Article
Engineering, Electrical & Electronic
Alwin Daus, Sam Vaziri, Victoria Chen, Cagil Koroglu, Ryan W. Grady, Connor S. Bailey, Hye Ryoung Lee, Kirstin Schauble, Kevin Brenner, Eric Pop
Summary: Flexible nanoscale FETs based on 2D semiconductors are fabricated by transferring transition metal dichalcogenides from rigid growth substrates to polyimide films with nano-patterned metal contacts. The approach allows for channel lengths down to 60 nm and on-state currents up to 470 mu A mu m(-1) at a drain-source voltage of 1 V, demonstrating comparable performance to flexible graphene and crystalline silicon FETs.
NATURE ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Roman Anufriev, Yunhui Wu, Jose Ordonez-Miranda, Masahiro Nomura
Summary: This study investigates the thermal conductivity of SiC nanostructures and finds that it is lower than that in bulk materials and scales proportionally with the narrowest dimension of the structures. The observed suppression of heat conduction is linked to surface phonon scattering, which limits the phonon mean free path and reduces the thermal conductivity.
NPG ASIA MATERIALS
(2022)
Article
Optics
DaeHwan Ahn, Sunghan Jeon, Hoyoung Suh, Seungwan Woo, Rafael Jumar Chu, Daehwan Jung, Won Jun Choi, Donghee Park, Jin-Dong Song, Woo-Young Choi, Jae-Hoon Han
Summary: To achieve high-responsivity for low-intensity light detection, the research team integrated In0.53Ga0.47As/InAs/In0.53Ga0.47As quantum well photo-field-effect-transistors (photo-FETs) on a Si substrate using direct wafer bonding. The carefully designed InAs quantum well channel showed higher effective mobility and narrower bandgap compared to bulk In0.53Ga0.47As, with suppressed defect generation. The InAs quantum well photo-FETs demonstrated outstanding transport characteristics, resulting in 1.8 times higher optical responsivity than InGaAs photo-FETs and fast rising/falling times. The InAs quantum well photo-FETs also showed potential for short-wavelength infrared (SWIR) light detection in the 1.0-2.5 μm range through bandgap engineering.
PHOTONICS RESEARCH
(2023)
Article
Physics, Applied
Fan Wu, Zheng-Qiang Zhu, He Tian, Zhaoyi Yan, Yanming Liu, Yang Xu, Chao-Yang Xing, Tian-ling Ren
Summary: Vertical stacked WSe2/black phosphorus (BP)/MoS2 heterostructure can be used for both tunneling transistor and high-performance photodetector, by tuning the thickness of the BP layer; Different device characteristics and functionalities can be optimized and expanded through the use of varied BP thicknesses.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Jamie Cleron, Alexander A. Baker, Torn Nakotte, Alyssa Troksa, Jinkyu Han
Summary: The critical reaction parameters to improve the phase purity of ε-Fe2O3 were identified and their effects were systematically studied. Under optimal conditions, high-purity ε-Fe2O3 could be obtained and separated using a simple magnetic separation protocol.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Calla M. McCulley, Xin Xu, Kelly Liang, Xiao Wang, Liang Wang, Ananth Dodabalapur
Summary: This design approach significantly improves the electrical performance and mitigates short-channel effects in short-channel organic thin-film transistors, reducing the total source-to-drain resistance to about 50 ohm.cm.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Lei Liu, Dong Pan, Lianjun Wen, Ran Zhuo, Jianhua Zhao
Summary: We have developed a new approach to grow vertically aligned InAs nanowires on Si (111) substrates using Ag as catalysts. The diameters of the nanowires obtained by this method are mainly distributed between 20 and 50 nm, and the nanowires with thinner diameters have fewer stacking faults and twin defects, allowing the production of high-quality pure wurtzite nanowires. By using these vertically aligned InAs nanowires as the channel material of field effect transistors, we achieved a field-effect mobility of about 2800 cm(2) V-1 s(-1) and an I (on)/I (off) ratio of about 10(4) at room temperature.
Review
Chemistry, Physical
Tianlai Xia, Yu Yang, Qiang Song, Mingchuan Luo, Mianqi Xue, Kostya (Ken) Ostrikov, Yong Zhao, Fengwang Li
Summary: Recently, electrocatalytic reactions involving oxygen, nitrogen, water, and carbon dioxide have been developed to produce clean energy, fuels, and chemicals. Understanding catalyst structures, active sites, and reaction mechanisms is crucial for improving performance. In this review, we summarize state-of-the-art in situ characterisation techniques used in electrocatalysis, categorizing them into microscopy, spectroscopy, and other techniques. We discuss the capacities and limits of these techniques to guide further advances in the field.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Qiuhui Li, Chen Yang, Lin Xu, Shiqi Liu, Shibo Fang, Linqiang Xu, Jie Yang, Jiachen Ma, Ying Li, Baochun Wu, Ruge Quhe, Kechao Tang, Jing Lu
Summary: Through quantum transport simulations, researchers found that the performance gap between NMOS and PMOS can be eliminated in InAs nanowire transistors by using nanoscale gate-all-around structure, and further improvement of performance symmetry can be achieved through several strategies. Therefore, ultrasmall GAA InAs nanowire transistors have tremendous prospects in CMOS integrated circuits.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Business
Mario Daniele Amore, Orsola Garofalo, Alice Guerra
Summary: This study uses a lab experiment to examine how leaders influence workers' (un)ethical behavior through financial reporting choices. The results show that workers are more likely to choose automatic reporting when their leader voluntarily does so and can punish them. Even workers who choose self-reporting tend to cheat less when their leader chooses automatic reporting. However, most leaders do not opt for automatic reporting and instead choose self-reporting, punishing workers who choose automatic reporting. The findings suggest a dual effect of leadership on ethical behaviors in organizations.
JOURNAL OF BUSINESS ETHICS
(2023)
Review
Multidisciplinary Sciences
Qing Zhang, Chunsen Liu, Peng Zhou
Summary: As the size of transistors decrease, the use of silicon material faces challenges due to its fundamental limits. Additionally, energy and time are consumed by data transmission outside of transistor computing due to speed mismatch. To meet the energy efficiency demands of big data computing, transistors need smaller feature sizes and faster data storage. Two-dimensional (2D) materials, with their atomic thickness and dangling-bond-free surface, offer advantages in transistor scaling-down and heterogeneous structure innovation. This review discusses the opportunities, progress, and challenges of 2D materials in transistor applications, starting from the performance breakthrough of 2D transistors.
Review
Chemistry, Multidisciplinary
Binghao Wang, Wei Huang, Michael J. Bedzyk, Vinayak P. Dravid, Yan-Yan Hu, Tobin J. Marks, Antonio Facchetti
Summary: This article provides an overview of the research progress in transparent conducting oxides (TCOs) and amorphous metal oxide (a-MO) semiconductors. The focus is on combustion synthesis (CS) and polymer doping as two promising approaches to optimize materials quality and manufacturing efficiency. The article discusses the advantages and challenges of these methods.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Ao Liu, Huihui Zhu, Sai Bai, Youjin Reo, Mario Caironi, Annamaria Petrozza, Letian Dou, Yong-Young Noh
Summary: Advancements in metal halide perovskite semiconductors have created renewed interest in their use in transistors. Improvements in performance have been made through fine-tuning of material compositions, processing techniques, and device engineering. However, more understanding is needed regarding the electrical properties of these materials, as well as their potential for use in large-area and microscale electronics.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Chuan Liu, Xiaojie Li, Yiyang Luo, Ya Wang, Sujuan Hu, Chenning Liu, Xiaoci Liang, Hang Zhou, Jun Chen, Juncong She, Shaozhi Deng
Summary: This study presents a new physical picture to understand the conduction mechanisms of advanced FETs with nontrivial gates and hybrid integrations. It proposes an indicator based on material and device factors for characterizing the transport and derives a unified and simplified solution for describing the current-voltage relations, current saturation, channel potentials, and drift field. The concise and unified solution provides general rules for quick understanding and designing of these complex, innovative devices.
Article
Chemistry, Multidisciplinary
Hua Fan, Vivek Maheshwari
Summary: A stable bifunctional water-splitting catalyst with controlled nanoscale domains of Pt and Ni has been developed through a self-assembly process, demonstrating low overpotential and ultralow Tafel slope for both HER and OER. The nanowire-like morphology of the material at the macroscale ensures rapid kinetics and mass transfer, crucial for high power applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Chang Liu, Shuimei Ding, Qianlei Tian, Xitong Hong, Wanhan Su, Lin Tang, Liming Wang, Mingliang Zhang, Xingqiang Liu, Yawei Lv, Johnny C. Ho, Lei Liao, Xuming Zou
Summary: This study proposes a new device that combines optoelectronic memory and a detector, allowing for switchable functions. The device has long storage time, high on/off ratio, and excellent multi-bit storage in the memory mode. In the detector mode, it exhibits fast response, impressive responsivity, and self-driven broadband detection. Additionally, the device has the ability to quickly resolve polarization in the near-infrared range.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Ying-Chun Shen, Cheng-Yu Lee, Hsing-Hsiang Wang, Ming-Hsuan Kao, Po-Cheng Hou, Yen-Yu Chen, Wen-Hsien Huang, Chang-Hong Shen, Yu-Lun Chueh
Summary: Researchers have developed a flexible photodetector based on a two-dimensional Sb2Se3 film, which exhibits high photosensing current and detection ranges from visible to near-infrared. The photodetector was fabricated using an efficient field-effect transistor platform and showed quick response times and broadband absorption.
Article
Chemistry, Multidisciplinary
Pengshan Xie, Xu Chen, Zixin Zeng, Wei Wang, You Meng, Zhengxun Lai, Quan Quan, Dengji Li, Weijun Wang, Xiuming Bu, Sai-Wing Tsang, SenPo Yip, Jia Sun, Johnny C. C. Ho
Summary: This paper proposes large-scale artificial synaptic device arrays based on organic molecule-nanowire heterojunctions with tunable photoconductivity, which can mimic and realize the functions of visual systems. These devices have tunable photoconductivity and response to multiple wavelengths, which can improve the recognition rate of neural networks.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Wen-Jun Niu, Ying-Yun Yan, Ru-Ji Li, Wei-Wei Zhao, Jiang-Lei Chen, Ming-Jin Liu, Bingni Gu, Wen-Wu Liu, Yu-Lun Chueh
Summary: In this proof-of-concept study, Fe nanoparticles encapsulated by nitrogen-doped carbon were evaluated and compared to Fe single atoms for boosting the catalytic activity of the oxygen reduction reaction (ORR) in Znair batteries. The Fe single atoms and Fe nanoparticles embedded in nitrogen-doped carbon exhibited excellent ORR performance with good stability and remarkable methanol tolerance. The strong interaction between the atomically dispersed Fe-Nx and adjacent Fe nanoparticles alters the electronic structure and enhances the electrocatalytic kinetics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Dong Chen, Shaoce Zhang, Di Yin, Wanpeng Li, Xiuming Bu, Quan Quan, Zhengxun Lai, Wei Wang, You Meng, Chuntai Liu, SenPo Yip, Fu-Rong Chen, Chunyi Zhi, Johnny C. C. Ho
Summary: This study reports a method to tailor the interlayer spacing of 2D SnS nanosheets, which enhances the chemical affinity towards NO3- and NO2- while inhibiting hydrogen generation. This promotes the rate-determining step in electrochemical nitrate reduction to ammonia and achieves excellent Faradaic efficiency and yield rate.
ADVANCED ENERGY MATERIALS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Jillian M. Buriak, Deji Akinwande, Natalie Artzi, C. Jeffrey Brinker, Cynthia Burrows, Warren C. W. Chan, Chunying Chen, Xiaodong Chen, Manish Chhowalla, Lifeng Chi, William Chueh, Cathleen M. Crudden, Dino Di Carlo, Sharon C. Glotzer, Mark C. Hersam, Dean Ho, Tony Y. Hu, Jiaxing Huang, Ali Javey, Prashant V. Kamat, Il-Doo Kim, Nicholas A. Kotov, T. Randall Lee, Young Hee Lee, Yan Li, Luis M. Liz-Marzan, Paul Mulvaney, Prineha Narang, Peter Nordlander, Rahmi Oklu, Wolfgang J. Parak, Andrey L. Rogach, Mathieu Salanne, Paolo Samori, Raymond E. Schaak, Kirk S. Schanze, Tsuyoshi Sekitani, Sara Skrabalak, Ajay K. Sood, Ilja K. Voets, Shu Wang, Shutao Wang, Andrew T. S. Wee, Jinhua Ye
Review
Chemistry, Multidisciplinary
Yifei Luo, Mohammad Reza Abidian, Jong-Hyun Ahn, Deji Akinwande, Anne M. Andrews, Markus Antonietti, Zhenan Bao, Magnus Berggren, Christopher A. Berkey, Christopher John Bettinger, Jun Chen, Peng Chen, Wenlong Cheng, Xu Cheng, Seon-Jin Choi, Alex Chortos, Canan Dagdeviren, Reinhold H. Dauskardt, Chong-an Di, Michael D. Dickey, Xiangfeng Duan, Antonio Facchetti, Zhiyong Fan, Yin Fang, Jianyou Feng, Xue Feng, Huajian Gao, Wei Gao, Xiwen Gong, Chuan Fei Guo, Xiaojun Guo, Martin C. Hartel, Zihan He, John S. Ho, Youfan Hu, Qiyao Huang, Yu Huang, Fengwei Huo, Muhammad M. Hussain, Ali Javey, Unyong Jeong, Chen Jiang, Xingyu Jiang, Jiheong Kang, Daniil Karnaushenko, Ali Khademhosseini, Dae-Hyeong Kim, Il-Doo Kim, Dmitry Kireev, Lingxuan Kong, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Lee, Fengyu Li, Jinxing Li, Cuiyuan Liang, Chwee Teck Lim, Yuanjing Lin, Darren J. Lipomi, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Liu, Xian Jun Loh, Nanshu Lu, Zhisheng Lv, Shlomo Magdassi, George G. Malliaras, Naoji Matsuhisa, Arokia Nathan, Simiao Niu, Jieming Pan, Changhyun Pang, Qibing Pei, Huisheng Peng, Dianpeng Qi, Huaying Ren, John A. Rogers, Aaron Rowe, Oliver G. Schmidt, Tsuyoshi Sekitani, Dae-Gyo Seo, Guozhen Shen, Xing Sheng, Qiongfeng Shi, Takao Someya, Yanlin Song, Eleni Stavrinidou, Meng Su, Xuemei Sun, Kuniharu Takei, Xiao-Ming Tao, Benjamin C. K. Tee, Aaron Voon-Yew Thean, Tran Quang Trung, Changjin Wan, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Wang, Paul S. Weiss, Hanqi Wen, Sheng Xu, Tailin Xu, Hongping Yan, Xuzhou Yan, Hui Yang, Le Yang, Shuaijian Yang, Lan Yin, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Yu, Evgeny Zamburg, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhang, Siyuan Zhao, Xuanhe Zhao, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zheng, Tao Zhou, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zhu, Guijin Zou, Xiaodong Chen
Summary: Humans are increasingly relying on flexible sensors to address challenges and improve quality of life in the digital and big data era. However, the market adoption of flexible sensors is still limited despite advancements in research. In this paper, we identify the bottlenecks hindering the maturation of flexible sensors and propose potential solutions to expedite their deployment and commercialization.
Article
Chemistry, Multidisciplinary
Mayur Chaudhary, Tzu-Yi Yang, Chieh-Ting Chen, Po-Chien Lai, Yu-Chieh Hsu, Yu-Ren Peng, Ashish Kumar, Chih-Hao Lee, Yu-Lun Chueh
Summary: This study demonstrates that the diffusion of metal ions can be modulated by defects in the switching medium, leading to the confinement of metal filaments in a precise 1D channel. This filament confinement achieved through defect engineering enables two interchangeable switching modes and could potentially address speed, size, and energy issues in computing.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dengji Li, You Meng, Yuxuan Zhang, Pengshan Xie, Zixin Zeng, Wei Wang, Zhengxun Lai, Weijun Wang, Sai-Wing Tsang, Fei Wang, Chuntai Liu, Changyong Lan, SenPo Yip, Johnny C. Ho
Summary: The surface of low-dimensional perovskites is crucial for determining their intrinsic properties, and understanding their characteristics and the influence of specific surfaces is valuable for designing functional surface-engineered structures. Surface passivation can also be used to stabilize and optimize perovskite-based optoelectronics. In this study, cesium lead bromide (CsPbBr3) microwire parallel arrays with specific (100)-terminated crystal planes were fabricated, showing excellent photodetection performance and long-term environment stability (>3000 h). It was found that environmental oxygen can passivate Br-vacancy-related trap states on the (100) surface and create charge carrier nanochannels to enhance the (opto)electronic properties. The coupling effects between oxygen species and the specific terminated crystal planes of perovskites highlight the importance of surface engineering for designing and optimizing perovskite-based devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sivacarendran Balendhran, Mohammad Taha, Shifan Wang, Wei Yan, Naoki Higashitarumizu, Dingchen Wen, Nima Sefidmooye Azar, James Bullock, Paul Mulvaney, Ali Javey, Kenneth B. Crozier
Summary: Flexible optoelectronics is a rapidly growing field with a wide range of potential applications, but current devices have limitations in their spectral range. This study demonstrates flexible photodetectors using a VOx nanoparticle ink, with an extremely broad operating wavelength range of 0.4 to 20 μm. These devices show mechanical flexibility, wide spectral response, and ease of fabrication, making them highly desirable for various applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiajia Zha, Shuhui Shi, Apoorva Chaturvedi, Haoxin Huang, Peng Yang, Yao Yao, Siyuan Li, Yunpeng Xia, Zhuomin Zhang, Wei Wang, Huide Wang, Shaocong Wang, Zhen Yuan, Zhengbao Yang, Qiyuan He, Huiling Tai, Edwin Hang Tong Teo, Hongyu Yu, Johnny C. Ho, Zhongrui Wang, Hua Zhang, Chaoliang Tan
Summary: In this work, an electronic/optoelectronic memory device based on tellurium-based 2D van der Waals heterostructure is reported. It features both long-term and short-term memory behaviors using electrical and optical pulses in the short-wave infrared (SWIR) region. This device enables a fully memristive in-sensor RC system for optical fiber signal processing.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Zhengxun Lai, Yuxuan Zhang, You Meng, Xiuming Bu, Wei Wang, Pengshan Xie, Weijun Wang, Chuntai Liu, SenPo Yip, Johnny C. Ho
Summary: This study reports a new type of electrode, metalloid electrode, which is more stable than conventional noble metals as electrical contacts for halide perovskites. The degradation mechanism of noble metal electrodes compared to metalloid electrodes is investigated, and it is found that noble metals are prone to halogenation in halide perovskites, while metalloid electrodes remain intact after long-term storage. Furthermore, the long-time operation stability of perovskite devices with metalloid electrodes is higher than that of noble metals. First-principles calculations confirm the exceptional stability of metalloid electrodes.
Article
Chemistry, Physical
Yezhan Li, Zhengxun Lai, You Meng, Wei Wang, Yuxuan Zhang, Xuwen Zhao, Di Yin, Weijun Wang, Pengshan Xie, Quan Quan, SenPo Yip, Johnny C. Ho
Summary: Organic-inorganic halide perovskite is a low-cost and solution-processable material with remarkable optoelectronic properties, making it an ideal candidate for high-performance photodetectors and reduce device costs.
JOURNAL OF MATERIOMICS
(2023)
Article
Materials Science, Multidisciplinary
Huide Wang, Haoxin Huang, Jiajia Zha, Yunpeng Xia, Peng Yang, Yonghong Zeng, Yi Liu, Rui Cao, Bing Wang, Wei Wang, Long Zheng, Ye Chen, Qiyuan He, Xing Chen, Ke Jiang, Ja-Hon Lin, Zhe Shi, Johnny C. Ho, Han Zhang, Chaoliang Tan
Summary: A tellurium (Te)-based infrared photodetector is reported with a specifically designed asymmetric electrical contact area, achieving low dark current and high sensitivity at room temperature.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yu-Chieh Hsu, Yan-Yu Chen, Jia-Min Shieh, Wen-Hsien Huang, Chang-Hong Shen, Yu-Lun Chueh
Summary: A pulsed laser annealing method is used to directly synthesize nickel silicide (NiSi) as a contact material to improve the contact of electric devices. The integration of NiSi into different devices significantly improves their performance.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
