Article
Chemistry, Physical
Elena Hajdeu-Chicarosh, Victoria Rotaru, Sergiu Levcenko, Rosalia Serna, Ivan A. Victorov, Maxim Guc, Raquel Caballero, Jose Manuel Merino, Ernest Arushanov, Maximo Leon
Summary: This study investigated the vibrational and optical properties of Sb2Se3 and Sb2S3 polycrystalline materials using Raman scattering and spectroscopic ellipsometry. The presence of desired phases was confirmed, and optical parameters were obtained, serving as a reference for the optimal design of optoelectronic devices based on these compounds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jumana Hasin Marayathungal, Neeraja Puthuparambil, Deep Das, Mini Kalyani, Rangarajan Bakthavatsalam, Janardan Kundu
Summary: This article reports a novel class of emerging solid-state materials called multicomponent heterometallic zero-dimensional halide hybrids, which have multiple functionalities due to the unique electronic properties of the constituent metal halide units. The synthesis of such materials is challenging due to the preferential crystallization of one-component structures. In this study, a single-crystalline bulk assembly of a 0D heterometallic halide hybrid was successfully achieved, demonstrating multimodal emission and strong white light emission without utilizing a secondary down-converting blue light source. The thermochromism observed in the material was also exploited for optical thermometry, indicating its potential applications in lighting and temperature sensing.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Muhammad Zeewaqar Manzoor, Joshua Zide, Zahoor Ahmad, Hassan M. Khan, Saeed Ahmad Buzdar, Yuejing Wang, Hafeez Ullah, Zahida Batool
Summary: This study reports the electronic band structure of dilute GaAsBi-GaAs quantum wells experimentally and theoretically. The innovative GaAsBi quantum wells were analyzed for their optical functions and critical point transition energies, providing important parameters for the design of optoelectronic devices using these alloys.
Article
Chemistry, Multidisciplinary
Yanbiao Shi, Guangming Zhan, Hao Li, Xiaobing Wang, Xiufan Liu, Lujia Shi, Kai Wei, Cancan Ling, Zhilin Li, Hao Wang, Chengliang Mao, Xiao Liu, Lizhi Zhang
Summary: This study presents a novel approach for achieving high efficiency and stability in photocatalytic CO2 reduction using homogeneously doped BiOCl nanosheets synthesized via an innovative molten strategy. By concurrently engineering bulk and surface structures, the method demonstrates exceptional selectivity and impressive rate for CO generation.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Bharathi Rajeswaran, Rajashree Konar, Sriram Guddala, Tali Sharabani, Eti Teblum, Yaakov Raphael Tischler, Gilbert Daniel Nessim
Summary: Low-wavenumber Raman (LWR) spectroscopy determines signatures in structural information and layer-to-layer dependency of transition metal dichalcogenides (TMDCs). This study investigates using Al/ Al2O3 coatings to enhance the LWR scattering of different 2H-WS2 layers and understand the structures of these large-area nanosheets.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Manohar Singh, Anit K. Ambedkar, Shrestha Tyagi, Virendra Kumar, Prashant Yadav, Ashwani Kumar, Yogendra K. Gautam, Beer Pal Singh
Summary: In this study, pure ZnO and Cu-doped ZnO thin films were deposited on a glass substrate using reactive co-sputtering. The structural, morphological, and optical properties of the thin films were characterized. The results showed that Cu doping modified the crystal structure, surface morphology, and optical properties of ZnO thin films. These findings are important for the research and applications of Cu-doped ZnO thin films.
Article
Chemistry, Inorganic & Nuclear
Elena Hajdeu-Chicarosh, Sergiu Levcenko, Rosalia Serna, Ivan V. Bodnar, Ivan A. Victorov, Oxana Iaseniuc, Raquel Caballero, Jose Manuel Merino, Ernest Arushanov, Maximo Leon
Summary: This study focuses on the synthesis and determination of the dielectric function of Cu2Zn(GexSi1-x)Se-4 solid solutions, with x = 0.4 and 0.8, in the range of 1-4.5 eV. Spectroscopic ellipsometry analysis is used to achieve suitable band gap tuning. The results show that the band gap of Cu2Zn(GexSi1-x)Se-4 alloys varies nonlinearly with composition, with band gap values reaching up to 1.87 eV. These findings are crucial for the design of efficient tailored photovoltaic solar cells and demonstrate the potential of kesterite compounds for the development of low-cost sustainable future solar cells.
SOLID STATE SCIENCES
(2022)
Article
Physics, Applied
Xiaofan Wang, Keisuke Shinokita, Kazunari Matsuda
Summary: Research has shown that the radiative lifetime of the negative trion in three-layered ReS2 increases linearly with temperature, indicating that the trions are in an optically allowed state.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Analytical
Mustafa Oguzhan Caglayan, Zafer Ustundag, Samet Sahin
Summary: Spectroscopic ellipsometry (SE) and attenuated internal reflection spectroscopic ellipsometry (TIRE) are promising methods in label-free biosensing applications. The sensors developed in this study have competitive detection ranges and limits, but show poor selectivity against analogs of BTX. The new derived aptamer has lower selectivity than its predecessors. Both SE and TIRE configurations successfully detect BTX spiked into real fish and shrimp samples.
Article
Materials Science, Multidisciplinary
Viktor Bender, Tobias Bucher, Mohammad Nasimuzzaman Mishuk, Yuxuan Xie, Isabelle Staude, Falk Eilenberger, Kurt Busch, Thomas Pertsch, Bayarjargal N. Tugchin
Summary: Photoluminescence spectroscopy is used to study the excitonic properties of mechanically exfoliated monolayer MoS2 under various physical and chemical stimuli. The study characterizes midgap exciton states originating from lattice defects and compares them to existing models. Statistical data analyses reveal a photoluminescence enhancement through physisorption of water molecules on the controversial excited-state A biexciton (AXX*). Additionally, the study shows that surface roughness does not account for changes in doping level within monolayer MoS2 on gold substrates, and reports a shift in the electron-phonon coupling properties due to physisorbed water films on top of the samples.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
M. A. Ebdah
Summary: The original manuscript of the published paper (Applied Physics A 128:378, 2022) was not revised properly pre-submission, resulting in scientific errors in its current published form. These errors lead to intrinsic contradictions and inconsistencies in the paper, which need to be outlined and corrected. Furthermore, corrections are required for the reported photovoltaic performance parameters in the paper. Using the FF% values reported in Table 1 and the correct J(SC) and V-OC values from the J-V curves' intercepts, the lowest power conversion efficiency (PCE%) value is 10.73% for the 5% Cs-doped film, not the 7% Cs-doped one.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Applied
Lung-Chien Chen, You-Siang Wei, Meng Zhang
Summary: We used MAPbBr(3) quantum dots and MABr salt as buffer layers to enhance the optoelectronic characteristics of CsPbBr3 perovskite light-emitting diodes (PeLEDs). The MAPbBr(3) QDs were prepared using a ligand-assisted reprecipitation method and bulk single crystals as the source material. The purified bc-MAPbBr(3) QDs and MABr salt were incorporated into the PeLED structures. The best brightness achieved was 7555 cd m(-2), and the external quantum efficiency reached 0.318%.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Lixuan Kan, Fenggui Zhao, Jiaji Hu, Sheng Tao, Ruiheng Pan, Wubiao Duan, Kai Wang
Summary: The magneto-photocurrent (MPC) is a powerful and versatile method for unraveling the photovoltaic spin-dynamics. A joint experimental and theoretical study on organic bulk heterojunction (BHJ) solar cells reveals that singlet polaron pair dissociation and triplet exciton-polaron reaction are the dominant mechanisms for photocurrent generation.
CHEMISTRY OF MATERIALS
(2022)
Article
Polymer Science
Saif M. H. Qaid, Hamid M. Ghaithan, Huda S. Bawazir, Abdullah S. Aldwayyan
Summary: Perovskite-type lead halides show promise in optoelectronic applications, especially in laser technology. However, their poor chemical and colloidal stability at the nanoscale limits further device development. Bulk perovskites, on the other hand, have potential as optical amplifiers. Material development is crucial for achieving high photoluminescence quantum yields and optical gains.
Article
Materials Science, Multidisciplinary
Hyun Jae Lee, Semin Ko, Hyejin Na, Hyeon Woo Jeong, Sun Sook Lee, Seon Joo Lee, Jaemin Lee, Soong Ju Oh, Hyun Seok Lee, Jae Yong Suh, Sungho Choi, Chul Hoon Kim
Summary: Molecular engineering is necessary to improve the photoluminescence efficiency of perovskite nanocrystals. By using time-resolved photoluminescence measurements and chemometric analysis, it is found that the structural difference between different quaternary alkylammonium ligands affects the accessibility of PbI2 additives to surface defects. The TDAI ligand shows the best PL performance due to its intrinsic structural properties.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kun Zhang, Xing Li, Yong Yang, Zhongxin Chen, Li Ma, Yaohua Zhao, Yijia Yuan, Fangzheng Chen, Xiaowei Wang, Keyu Xie, Kian Ping Loh
Summary: Simultaneously achieving high gravimetric energy density (E-g) and volumetric energy density (E-v) in practical Li-S batteries is a longstanding challenge. In this study, anthraquinone-containing polymer tubes (PQT) were designed and prepared to regulate the redox chemistry of sulfur species. The PQT/S cathode exhibited stable cycling capacity, remarkable rate performance, and high areal capacity under lean electrolyte condition. The assembled Li-S pouch cell met the requirement for practical operation with high E-g and E-v.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zehong Chen, Xinwen Peng, Zhongxin Chen, Tingzhen Li, Ren Zou, Ge Shi, Yongfa Huang, Peng Cui, Jian Yu, Yuling Chen, Xiao Chi, Kian Ping Loh, Zhaoqing Liu, Xuehui Li, Linxin Zhong, Jun Lu
Summary: The by-product of the papermaking industry, lignosulfonate, is used as a bioligand to produce single-atom catalysts (SACs) with highly active M-N-4-S sites (M represents Fe, Cu, and Co) through metal-nitrogen/sulfur coordination. This study demonstrates that the SACs produced have excellent catalytic performance in oxygen reduction and evolution reactions for Zn-air batteries, paving the way for the industrial production of cost-effective SACs in a sustainable manner.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xing Li, Kun Zhang, Zhen Li, Youguo Yan, Yijia Yuan, Li Ma, Keyu Xie, Kian Ping Loh
Summary: Nanoporous covalent organic frameworks (COFs) are designed as gas diffusion layers (GDLs) for non-aqueous Li-air batteries, significantly improving their stability and performance. The COF GDLs with tailored pore size and superhydrophobicity can prevent the intrusion of organic electrolytes and moisture, allowing the batteries to have high capacity, fast kinetics, and excellent stability even in humid and diverse atmospheres.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xiaohan Wu, Da Lan, Chengjun Sun, Hua Zhou, Xiaojiang Yu, Ping Yang, Xiaoqian Yu, Chao Liu, Pingfan Chen, Jun Ding, Jingsheng Chen, Gan Moog Chow
Summary: This study reports a two-step magnetization reversal in PZT/LSMO superlattices, which is attributed to the combined effects of strain, ferroelectric polarization, and exchange. The results demonstrate enhanced magnetoelectric coupling in PZT/LSMO superlattices, which holds significant implications for the application of multiferroic-based devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Stalin Joseph, Gurwinder Singh, Jang Mee Lee, Xiaojiang Yu, Mark BH. Breese, Sujanya Maria Ruban, Suresh Kumar Bhargava, Jiabao Yi, Ajayan Vinu
Summary: In this study, a hierarchical carbon structure embedded with micro-and meso-pores was successfully synthesized through a unique one-pot synthesis method. Soft drink was utilized as the carbon source, converting industrial waste into value-added products for energy systems. The optimized hierarchical structure exhibited a larger specific surface area and delivered promising functionalities in various applications such as batteries and CO2 capture.
Article
Chemistry, Physical
Eri Widianto, Natalita Maulani Shobih, Natalita Maulani Nursam, Muhammad Yusrul Hanna, Kuwat Triyana, Andrivo Rusydi, Iman Santoso
Summary: We investigate the optical properties of methylammonium lead iodide (MAPbI3) combined with graphene oxide (GO) and reveal unusual optical changes and spectral weight transfer using spectroscopic ellipsometry. Our analysis shows that the electronic correlation effect induced by GO leads to tunable optical properties of MAPbI3. The increase in absorption in the MAPbI3 layer indicates a decrease in the number of holes, suggesting the hole transport properties of GO. This study provides critical information for the future development of high-performance PSCs and reconciles previous experimental studies on the positive impact of GO on charge extraction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Weixin He, Yali Yang, Chuanzhao Li, Walter P. D. Wong, Fanica Cimpoesu, Ana Maria Toader, Zhenyue Wu, Xiao Wu, Zexin Lin, Qing-hua Xu, Kai Leng, Alessandro Stroppa, Kian Ping Loh
Summary: It is discovered that the polar axis in ferroelectric 2D Dion-Jacobson (DJ) perovskites can be tuned from the out-of-plane (OOP) to the in-plane (IP) direction by substituting the iodide with bromide in the lead halide layer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Budi Mulyanti, Muhammad Raihan Anwar, Chandra Wulandari, Lilik Hasanah, Roer Eka Pawinanto, Ida Hamidah, Andrivo Rusydi
Summary: Perovskite solar cells (PSC) are being increasingly researched due to their flexibility, attractive properties, and low production cost. However, the thin-film structure of PSC often results in incomplete absorption of incident light, which affects PSC efficiency. This study demonstrates the successful improvement of light absorption in PSC by embedding corrugated void-like structures and modifying the perovskite thickness using theoretical simulations based on the FDTD technique.
Article
Physics, Applied
Muhammad Shoufie Ukhtary, Ahmad R. T. Nugraha, Adam B. Cahaya, Andrivo Rusydi, Muhammad Aziz Majidi
Summary: We propose and investigate the performance of a hybrid quantum battery, called the Kerr quantum battery, which consists of two interacting quantum oscillators, a harmonic oscillator as the charger and an anharmonic oscillator with Kerr nonlinearity as the battery. The nonuniform spacing between energy levels, increasing with energy level, allows the Kerr quantum battery to store more energy and reach maximum stored energy faster than a qubit battery or a harmonic oscillator battery. The Kerr quantum battery exhibits a larger average charging power than a qubit battery and allows for efficient energy extraction. The strength of nonlinearity controls all properties of the Kerr quantum battery, transforming it from a harmonic oscillator to a qubit battery.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Muhammad Avicenna Naradipa, Prayudi Lianto, Gilbert See, Arvind Sundarrajan, Andrivo Rusydi
Summary: Metallic contaminants in complex heterostructures play important roles in determining physical properties and devices' performance. This study investigates the optical properties and influence of metal contaminants on device performance in polyimide heterostructures using spectroscopic ellipsometry and finite-difference time-domain calculations.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Xun Geng, Gurwinder Singh, C. I. Sathish, Zhixuan Li, Rohan Bahadur, Yang Liu, Sean Li, Xiaojiang Yu, Mark Breese, Jiabao Yi, Ajayan Vinu
Summary: Biomass-derived nanoporous carbons with embedded graphene-like structures and surface oxygenated functional groups were prepared using a solid-phase activation strategy. The optimized material showed high CO2 adsorption and impressive specific capacitance, making it promising for CO2 capture and energy storage.
Article
Chemistry, Organic
Luoqiang Zhang, Dao-Yong Zhu, Jingyao Hu, Minjun Feng, Tze Chien Sum, Haoran Sun, Hajime Hirao, Yonggui Robin Chi, Jianrong Steve Zhou
Summary: In this study, direct alkylation of 5- and 6-membered heteroarenes, including azoles and azines, was achieved using alkanes, ethers, and carbamates under LED irradiation. Through the discovery of an organic photosensitizer, 9,10-dichloroanthracene, the overall efficiency of radical couplings was significantly increased via energy transfer of exciplexes, enabling successful oxidative couplings even with 1.5 equivalents of alkanes.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Nanoscience & Nanotechnology
Sankaran Ramesh, Minjun Feng, Tomoki Furuhashi, Tze Chien Sum
Summary: This article introduces a method for studying excitonic interactions and dynamics in layered perovskites using a 2DES setup with a hollow-core fiber compressor (HCFC). By modifying a commercial 2DES setup, high-resolution 2D spectra can be obtained, and exciton delocalization is observed in a representative two-phase Ruddlesden-Popper perovskite thin film.
Article
Nanoscience & Nanotechnology
Riki Subagyo, Pramitha Y. D. Maulida, Dominik Kowal, Sri Hartati, Rossyaila M. Muslimawati, Yulfi Zetra, Lina J. Diguna, Syafsir Akhlus, Muhammad H. Mahyuddin, Lei Zhang, Chi S. Tang, Caozheng Diao, Andrew T. S. Wee, Muhammad D. Birowosuto, Andrivo Arramel, Andrivo Rusydi, Yuly Kusumawati
Summary: In this study, low-dimensional hybrid organic-inorganic perovskites were successfully designed and synthesized by selecting specific ionic liquid components. The characteristics of electronic interactions and optical responses were revealed using X-ray absorption spectroscopy measurements and photoluminescence spectroscopy.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zhongxin Chen, Jia Liu, Kian Ping Loh
Summary: The article introduces the application of single-atom catalysts in the flow synthesis of fine chemicals. The researchers discuss the reaction mechanism of SAC-catalyzed processes and the advantages of SACs in drug preparation. They also emphasize the importance of continuous-flow techniques in improving productivity and simplifying process transfer. Additionally, the article identifies technical barriers in SAC research and offers perspectives on standardized and scalable protocols for mass production.
ACCOUNTS OF MATERIALS RESEARCH
(2023)
