Article
Chemistry, Multidisciplinary
Longfei Liu, Dake Mao, Zhe Li, Mengxi Zheng, Kai He, Chengde Mao
Summary: Surface-assisted, tile-based DNA self-assembly is a powerful method for constructing large, two-dimensional nanoarrays. Incorporating different types of tiles into one assembly system is challenging due to the differential adsorptions on the solid surface. Our solution to this problem is to engineer the tiles with comparable molecular weights while maintaining their architectures. We have successfully demonstrated this strategy by assembling binary DNA 2D arrays using very different tiles, and we expect it to facilitate the assembly of other complex nanostructures as well.
Article
Multidisciplinary Sciences
Yuyan Wang, Xin Huang, Xinxing Zhang
Summary: The study presents a robust self-healing material with high strength, toughness, and healing efficiency by incorporating high density noncovalent bonds at the interfaces between nanosheets and matrix, overturning the traditional notion that high mechanical strength and healing ability are mutually exclusive in noncovalent bonding materials.
NATURE COMMUNICATIONS
(2021)
Review
Chemistry, Inorganic & Nuclear
Yuya Domoto, Makoto Fujita
Summary: The coordinative self-assembly of simple building blocks towards complex nanostructures is currently a popular research area in the development of artificial nanomaterials comparable to biological systems. Traditional coordination donors have been widely used in previous studies, but the recent emergence of weak pi-coordination between metal ions and unsaturated carbon-carbon bonds offers a flexible and highly tolerant bonding approach for complex nanoarchitectures. The combination of metal-acetylene pi-coordination with conventional coordination has allowed for the formation of large polyhedral complexes with unprecedented molecular entanglement, highlighting the potential advantages of this concept.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Christiaan H. W. A. Corbet, Bart W. L. van den Bersselaar, Bas F. M. de Waal, Robby Reynaerts, Kunal S. Mali, Steven De Feyter, Alain M. Jonas, E. W. Meijer, Ghislaine Vantomme
Summary: The synthesis and study of discrete oligomers of alkyl-bridged naphthalenediimides (NDIs) were reported. The study found that the discrete NDI oligomers preferentially formed lamellar structures in bulk, and the molecular architecture and crystallization conditions played significant roles in nanoscale ordering. Moreover, well-defined lamellar regions were observed at the liquid-solid interface.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jae-Myoung Kim, Chungyeon Lee, Yeonhee Lee, Jinhaeng Lee, So-Jung Park, Sungho Park, Jwa-Min Nam
Summary: Plasmonic gap nanostructures have attracted extensive research due to their strongly enhanced optical responses, but the reproducible and controlled preparation of highly uniform nanogaps and the prediction, understanding, and control of their optical properties remain challenging.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xiangyuan Ouyang, Yongli Wu, Linjie Guo, Le Li, Mo Zhou, Xinyi Li, Ting Liu, Yawen Ding, Huaiyu Bu, Gang Xie, Jianlei Shen, Chunhai Fan, Lihua Wang
Summary: In this study, the ordered self-assembly of CuNCs using DNA nanoribbon as the template (DNR/CuNCs) was found to improve the electrochemiluminescence (ECL) properties of CuNCs compared with individual CuNCs. The DNR/CuNCs showed a high ECL yield of 46.8% in K2S2O8, which was approximately 68 times higher than that of individual CuNCs. This strategy was also successfully applied to other ECL emitters, such as gold nanoclusters and the Ru(bpy)(3)(2+)/TPrA system. Furthermore, a DNR/CuNC-based ECL biosensor with higher sensitivity was constructed for dopamine determination, showing the potential of DNR/CuNCs as a new type of superior luminophore candidate in ECL bioanalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biology
Deepika Mathur, Harpreet Kaur, Anjali Dhall, Neelam Sharma, Gajendra P. S. Raghava
Summary: The study focuses on peptide nanostructures formed by self-assembly, creating a repository of short peptides with emphasis on the role of aromatic amino acids in forming these nanostructures. SAPdb provides comprehensive information in a user-friendly manner, making it a valuable resource for researchers in the field of nanobiotechnology.
COMPUTERS IN BIOLOGY AND MEDICINE
(2021)
Article
Chemistry, Physical
Yan-Yan Xie, Xiao-Tong Qin, Jiaxing Zhang, Mei-Yan Sun, Feng-Ping Wang, Meimei Huang, Shi-Ru Jia, Wei Qi, Yuefei Wang, Cheng Zhong
Summary: Molecular chirality plays a significant role in the self-assembly of antimicrobial peptides, ultimately affecting their antimicrobial activity. Heterochiral peptides exhibit more stable helical nanofibers and superior antimicrobial activity against bacteria, opening up possibilities for fabricating efficient antimicrobial materials by controlling the chirality and structure of the materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Hyunwoo Kim, Seunghyun Moon, Jongwoo Kim, Sang Hwan Nam, Dong Hwan Kim, Jeong Seop Lee, Kyoung-Ho Kim, Evan S. H. Kang, Kwang Jun Ahn, Taewan Kim, ChaeHo Shin, Yung Doug Suh
Summary: The study investigated photoluminescence enhancement from few-layer MoS2 transferred on Au nanostructure arrays with controlled localized surface plasmon resonance (LSPR) spectral positions. Two distinctive regimes in LSPR mode-dependent PL enhancement were revealed, with a maximum enhancement of around 40-fold at zero detuning and a modest enhancement of around 10-fold with red-shift detuned LSPR, attributed to LSPR-induced optical field enhancement and the Purcell effect, respectively.
Article
Chemistry, Physical
Xiao-Jing Wang, Cheng-Bin Yu, Shu-Jun Yu, Wei Wang
Summary: This study presents a novel strategy for fabricating nanostructures via the principles of lipid self-assembly, with a variety of nanostructures obtained by adjusting solvent polarity and molecular interactions. This systematic investigation provides insights into controlling self-assembled nanostructures in different solvents.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Zhida Wang, Yi Yang, Jiamei Mo, Chenglin Zhao, Changfeng Yan
Summary: Pt-containing ordered honeycomb nanocomposites were synthesized via self-assembly method, showing potential applications in hydrogen evolution reaction and oxygen reduction reaction, and the strategy could be expanded to other metals.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Shilin Mu, Hongxu Chen, Chenyu Shi, Junhu Zhang, Bai Yang
Summary: Gold nanoring arrays with tunable plasmonic resonances can be prepared using colloidal lithography, allowing for flexible control over the dimensions of the nanorings. The plasmonic resonance spectra of the nanoring arrays can be obtained using Fourier transform near-infrared (FT-NIR) absorption spectroscopy. The prepared gold nanoring arrays exhibit a strong MR or IR plasmonic resonance which can be tuned by varying the nanoring dimensions, with potential applications in surface-enhanced spectroscopy or plasmonic sensing.
Article
Engineering, Environmental
Yuan -Yuan Zhao, Zixuan Chen, Ling Zhang, Xue-Wei Qin, Hao Liu, Bi-Yuan Zheng, Meirong Ke, Jian-Dong Huang, Xingshu Li
Summary: A self-degradable nanostructured photothermal agent with high photothermal conversion efficiency was developed using a molecular surgery approach. This agent showed excellent efficacy in inhibiting tumor growth at a low light dose, and its degradation products had negligible cytotoxicity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Dong Uk Lee, Sang Bin Jeong, Byeong Jin Lee, Se Kye Park, Hyoung-Mi Kim, Jae Hak Shin, Seung Yeon Lee, Gunwoo Kim, Junghun Park, Gyu Man Kim, Jae Hee Jung, Dong Yun Choi
Summary: This study develops a novel coating based on petal-like nanostructures, which demonstrates high protection and disinfection efficiency on fabrics. It is of great importance for ensuring the safety of healthcare workers and managing contagious diseases in medical environments.
Article
Chemistry, Analytical
Zhipeng Xie, Simin Liu, Yueming Zhai
Summary: This study focuses on the translocation characteristics of DNA tetrahedrons to evaluate their self-assembly process and the advantage of tetrahedral DNA nanostructures as a signal amplification label.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Fu Huang, Feier Fang, Yue Zheng, Qi You, Henan Li, Shaofan Fang, Xiangna Cong, Ke Jiang, Ye Wang, Cheng Han, Wei Chen, Yumeng Shi
Summary: In this study, an optically-stimulated artificial synapse has been demonstrated using a heterostructure of Cs2AgBiBr6 perovskite and IGZO thin film. The heterostructure significantly enhances the photoresponse and synaptic plasticity, enabling the realization of various synaptic behaviors and achieving a high accuracy rate for pattern recognition in an artificial neural network simulation.
Article
Chemistry, Physical
Haotian Lu, Chunpeng Yang, Feifei Wang, Lu Wang, Jinghong Zhou, Wei Chen, Quan-Hong Yang
Summary: Lithium metal anodes have great potential for high-energy-density secondary batteries. However, uncontrolled lithium dendrite growth inhibits their practical application. This study proposes an interfacial high-concentration electrolyte induced by nitrogen- and oxygen-doped carbon nanosheets (NO-CNS) to stabilize lithium metal anodes. The interfacial high-concentration electrolyte improves charge transfer kinetics and ionic mass-transfer, leading to excellent electrochemical performance.
Article
Chemistry, Multidisciplinary
Meng Wang, Jie Chen, Zhangliu Tian, Wenrui Dai, Baihua Cui, Xinhang Cui, Dong Wang, Yukun Xiao, Xu Lian, Chonglai Jiang, Haotian Yang, Yihe Wang, Zejun Sun, Yishui Ding, Yi-Yang Sun, Jia Zhang, Wei Chen
Summary: Research reveals that by adjusting the surface structure of WO3 photocathodes, the formation of Li2O2 can be controlled and the photocatalytic reaction activity can be enhanced. Additionally, the (002) facet is found to have higher oxidation ability, resulting in an ultralow polarization overpotential and high discharge capacity over the (002) facet dominated WO3 photocathode.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Zhangliu Tian, Yumin Da, Meng Wang, Xinyu Dou, Xinhang Cui, Jie Chen, Rui Jiang, Shibo Xi, Baihua Cui, Yani Luo, Haotian Yang, Yu Long, Yukun Xiao, Wei Chen
Summary: Photoelectrochemical oxidation provides a promising strategy for glucaric acid production. In this work, selective oxidation of glucose to glucaric acid is realized on the photoanode of defective TiO2 decorated with single-atom Pt via a photoelectrochemical strategy. By optimizing oxygen vacancies, the defective TiO2 photoanode exhibits greatly improved charge separation, significantly enhanced selectivity, and yield of C-6 products.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yumin Da, Zhangliu Tian, Rui Jiang, Yuan Liu, Xu Lian, Shibo Xi, Yi Shi, Yongping Wang, Haotian Lu, Baihua Cui, Jinfeng Zhang, Xiaopeng Han, Wei Chen, Wenbin Hu
Summary: This paper reports the synthesis of a PtNi-NC catalyst with high catalytic activity. Density functional theory calculations reveal that PtNi dual atoms generate a synergistic effect by modulating the local electronic structure and optimizing the charge distribution, contributing to optimized adsorption properties and enhanced electrocatalytic performance. This work provides a new avenue for the fabrication of dual-atom catalysts.
SCIENCE CHINA-MATERIALS
(2023)
Article
Electrochemistry
Yuan Liu, Xu Lian, Chonglai Jiang, Zejun Sun, Jinlin Yang, Yishui Ding, Wei Chen
Summary: To stabilize sodium metal anodes (SMAs), various strategies have been developed, including employing anode hosts and electrolyte additives to establish protective layers. In this study, the interaction mechanism between sodium metal and sulfur-containing functional groups was investigated using comparative model systems of alpha-sexithiophene (6T) and p-sexiphenyl (6P). The results showed that sodium atoms tend to interact with sulfur atoms and their connected carbon atoms as well as the aromatic carbon atoms of the end groups of 6T molecules, while no chemical interaction between Na and 6P molecules was observed. These findings shed light on the rational design of sulfur-containing protective materials and relevant interface engineering to stabilize SMAs.
Article
Chemistry, Physical
Li Peize, Lian Xu, Gou Jian, Duan Sisheng, Ding Yishui, Niu Yuxiang, Chen Wei
Summary: Realizing effective Ohmic contact to SiC is a major challenge in high-power and high-frequency SiC electronics. Here, we grew a high-work-function interfacial molybdenum trioxide (MoO3) layer on 4H-SiC(0001) and investigated its surface properties during annealing in different gas environments. The results show that the MoO3 layer tends to be reduced and the surface work function decreases accordingly, making it a promising approach for achieving effective Ohmic contact with SiC.
Article
Chemistry, Physical
Yumin Da, Rui Jiang, Zhangliu Tian, Ganwen Chen, Yukun Xiao, Jinfeng Zhang, Shibo Xi, Yida Deng, Wei Chen, Xiaopeng Han, Wenbin Hu
Summary: Alloying platinum with early transition metals is a promising approach to optimize catalyst adsorption behaviors. A strategy combining thermal shock technique with electrochemical activation is reported for the first time to prepare Pt3V alloy as a hydrogen evolution reaction catalyst. The as-prepared catalyst exhibits exceptional catalytic activity and durability, outperforming the state-of-the-art Pt/C catalyst. This work may inspire future research on Pt-based early transition metal alloy catalysts for electrocatalysis.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yumin Da, Zhangliu Tian, Rui Jiang, Ganwen Chen, Yuan Liu, Yukun Xiao, Jinfeng Zhang, Shibo Xi, Wei Chen, Xiaopeng Han, Wenbin Hu
Summary: In this research, a highly efficient electrocatalyst for the hydrogen evolution reaction was developed by using Pt single atoms supported on ultrathin NiO nanosheets. A self-gating phenomenon was induced in the nanosheets, resulting in the formation of active and inert regions. The active region allows for the HER process to occur, while the inert region accumulates charge carriers, leading to high conductivity and stability of the electrocatalyst.
Article
Chemistry, Physical
Yishui Ding, Xiangyu Hou, Tengyu Jin, Yanan Wang, Xu Lian, Yuan Liu, Yihe Wang, Sisheng Duan, Xiangrui Geng, Meng Wang, Jingyu Mao, Yuanyuan Zhang, Peirong Tang, Minghua Li, Huamao Lin, Yao Zhu, Siewlang Teo, Qiang Zhu, Ming Lin, Wei Chen
Summary: In this study, the growth mechanism and interfacial chemistry of ultrathin platinum and molybdenum films on high-crystalline Al1-xScxN surface were investigated. The chemical and electronic structure evolution of the interface during the deposition process were examined using in-situ X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. The structural properties of the interface were characterized by cross-sectional transmission electron microscopy, X-ray diffraction spectroscopy, and atomic force microscopy. The study reveals the formation of ionic Pt2+-N bonds at the Pt/Al1-xScxN interface, while molybdenum does not bond with the substrate. Furthermore, electron transfer induces upward band-bending effects on the Al1-xScxN surface upon both platinum and molybdenum interactions. The research on the chemical and structural properties of ultrathin metal electrodes and Al1-xScxN interfaces provides guidance for designing high-performance micro-electromechanical devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiang Chen, Xinyue Xu, Yuwen Cheng, He Liu, Dongdong Li, Yumin Da, Yongtao Li, Dongming Liu, Wei Chen
Summary: The study presents a facile strategy to enhance the oxygen evolution reaction (OER) activity of Ni-based materials through doping and interfacial modulation. Experimental and theoretical results demonstrate that this strategy can effectively tune the binding energies of OER intermediates and reduce the energy barrier, leading to significantly improved OER activity.
Article
Chemistry, Physical
Xiangrui Geng, Yishui Ding, Yuan Liu, Xiangyu Hou, Tengyu Jin, Wei Chen
Summary: Achieving effective Ohmic contact between SiC and metal electrodes remains a challenge due to the high Schottky barrier. One promising approach is to introduce a high-work-function interfacial layer. However, the interaction mechanisms between the interfacial layer and the SiC substrate have been rarely studied. In this work, layers of high-work-function MoO3 and Pt were grown on the SiC surface, and the evolutions of the system during annealing under different environments were studied. The results provide a detailed understanding of the Pt/MoO3 interface and its response to various conditions.
Letter
Multidisciplinary Sciences
T. J. Whitcher, A. D. Fauzi, C. Diao, X. Chi, A. Syahroni, T. C. Asmara, M. B. H. Breese, A. H. Castro Neto, A. T. S. Wee, M. A. Majidi, A. Rusydi
NATURE COMMUNICATIONS
(2023)
Article
Electrochemistry
Yuan Liu, Xu Lian, Xiaojiang Yu, Yuxiang Niu, Jinlin Yang, Yishui Ding, Wei Chen
Summary: This study investigates the interaction processes between alkali metal anodes (AMAs) and organic protective materials containing nitrogen groups. The results show that Li and Na preferentially interact with the outer nitrile groups of the protective material before interacting with the inner imine groups. Additionally, the sodiophilicity difference between the two nitrogen-containing groups is smaller compared to their lithiophilicity difference. These findings provide valuable insights for the development of more effective protective materials in the future.
BATTERIES & SUPERCAPS
(2023)
Review
Chemistry, Multidisciplinary
Yumin Da, Rui Jiang, Zhangliu Tian, Xiaopeng Han, Wei Chen, Wenbin Hu
Summary: The development of cost-effective and highly efficient electrocatalysts is crucial for achieving a low-carbon footprint in the industry. Single-atom alloys (SAAs) have unique electronic structures, well-defined active sites, and maximum atom utilization, making them promising replacements for traditional noble metal catalysts. SAAs can tailor the adsorption properties of reaction species to promote electrocatalytic behaviors.
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)