Article
Engineering, Electrical & Electronic
Sahin Sorifi, Pallavi Aggarwal, Shuchi Kaushik, Rajendra Singh
Summary: In this study, the thickness-dependent optical and optoelectronic properties of mechanically exfoliated GaSe thin films were comprehensively studied. Raman and photoluminescence measurements were conducted on ultrathin GaSe flakes of different thicknesses to investigate the changes in their phonon modes and optical properties. Metal-semiconductor-metal (MSM) photodetectors were fabricated on GaSe flakes to understand the optoelectronic properties. Thicker GaSe flakes exhibited better performance, with a maximum photoresponsivity (R lambda) of approximately 0.21 A/W and an external quantum efficiency (EQE) of approximately 42 at 620 nm compared to thinner flakes. This study could contribute to the advancement of future high-performance optoelectronic devices based on quasi-2D materials.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yue Zhao, Gang Wu, Kuan-Ming Hung, Jiung Cho, Miri Choi, Cormac O. Coileain, Georg S. Duesberg, Xiang-Kui Ren, Ching-Ray Chang, Han-Chun Wu
Summary: In this work, we fabricated field effect transistor gas sensors based on mechanically exfoliated van der Waals (vdW) layered materials and investigated their electrical field-dependent gas sensing properties. The results showed good agreement between experimental and theoretical values, indicating the validity of the Langmuir absorption model for vdW materials. Additionally, we demonstrated that the device sensing behavior strongly depends on carrier availability, leading to giant sensitivities and strong selectivity at the sensitivity singularity. Furthermore, our study revealed that these features can be utilized to quickly detect and differentiate low concentrations of mixed hazardous gases using sensor arrays.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Wenhui Li, Qian Gao, Yu Wang, Peng Cheng, Yi-Qi Zhang, Baojie Feng, Zhenpeng Hu, Kehui Wu, Lan Chen
Summary: In this study, it is demonstrated that few-layer gallium selenide (GaSe) grown on highly ordered pyrolytic graphite (HOPG) exhibits coexistence of quantum well states (QWS) and a two-dimensional electron gas (2DEG). The QWS are located in the valence bands and the 2DEG is located in the conduction bands. Additionally, monolayer GaSe/HOPG heterostructures with different stacking angles form distinct moire patterns that effectively modulate the electronic properties of GaSe.
Article
Engineering, Electrical & Electronic
Ho Huu Hau, Truong Tien Hoang Duong, Nguyen Khac Man, Tran Thi Viet Nga, Chu Thi Xuan, Dang Thi Thanh Le, Nguyen Van Toan, Chu Manh Hung, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: MoS2 nanosheets exfoliated from bulk MoS2 through sonication probe exhibit enhanced NO2 gas sensing properties, with high response rates, low detection limits, and excellent long-term stability, showing potential for future practical applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
Satyam Sahu, Golam Haider, Alvaro Rodriguez, Jan Plsek, Martin Mergl, Martin Kalbac, Otakar Frank, Matej Velicky
Summary: This work introduces a novel method for preparing large-area monolayers of various layered materials using gold-assisted exfoliation, followed by their transfer to arbitrary substrates. The quality of the prepared layers and their optical properties are assessed using X-ray photoelectron, Raman, and photoluminescence spectroscopies. Field-effect transistors and photodetectors are then fabricated to demonstrate the suitability of this technique for large-area optoelectronic devices.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Chun Li, Liyun Zhao, Qiuyu Shang, Ruonan Wang, Peng Bai, Jun Zhang, Yunan Gao, Qiang Cao, Zhongming Wei, Qing Zhang
Summary: This study demonstrates room-temperature near-infrared lasing from mechanically exfoliated.-phase indium selenide (InSe) microflakes free from external optical microcavities at a center wavelength of similar to 1030 nm. The lasing action occurs at the sub-Mott density level and is generated by exciton-exciton scattering with a high net modal optical gain of similar to 1029 cm(-1). Microdisks fabricated by a simple laser printing sustain the lasing with a reduced threshold, indicating InSe as a promising material for near-infrared microlasers in various applications.
Article
Nanoscience & Nanotechnology
Rishi Ranjan Kumar, Mohammad Rezwan Habib, Afzal Khan, Po-Cheng Chen, Thangapandian Murugesan, Shivam Gupta, Aswin Kumar Anbalagan, Nyan-Hwa Tai, Chih-Hao Lee, Heh-Nan Lin
Summary: The study investigates the role of sulfur vacancies in MoS2 nanosheets in gas sensing response, with experiments and simulations showing a correlation between sulfur vacancies and enhanced NO2 adsorption. The findings propose a detailed temperature-dependent sensing mechanism for p-type MoS2 nanosheets considering sulfur vacancies as single electron acceptors.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Marcel S. Claro, Juan P. Martinez-Pastor, Alejandro Molina-Sanchez, Khalil El Hajraoui, Justyna Grzonka, Hamid Pashaei Adl, David Fuertes Marron, Paulo J. Ferreira, Oleksandr Bondarchuk, Sascha Sadewasser
Summary: Bandgap engineering and quantum confinement in semiconductor heterostructures allow for fine-tuning of material response to electromagnetic fields and light. However, forming semiconductor heterostructures on lattice-mismatched substrates has been a challenge. This study demonstrates the successful van der Waals epitaxy of 2D GaSe and InSe heterostructures on silicon and sapphire substrates with different lattice parameters. The GaSe/InSe heteroepitaxy enables the growth of quantum wells and superlattices with photoluminescence and absorption related to interband transitions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Linchangqing Yang, Junfang Li, Meng Yin, Qingkong Kong, Guangcheng Xi
Summary: Due to its layered structure, graphdiyne has a strong tendency to form 2D materials, and most of the current research is based on GDY 2D structures. However, the synthesis of ultrathin nanowires with a high aspect ratio has not been reported. In this study, ultrathin GDY nanowires with diameters below 3 nm were successfully synthesized using a two-phase interface method, exhibiting excellent crystallinity and an aspect ratio of over 2500. The formation of GDY ultrathin nanowires is believed to follow the oriented-attachment mechanism of nanoparticles. These nanowires demonstrate significant quantum confinement effect, enhanced photoelectric effect, and promising applications in surface-enhanced Raman sensing.
Article
Nanoscience & Nanotechnology
Tran Thi Thu Huong, Nguyen Thu Loan, Thi Dieu Thuy Ung, Nguyen Thanh Tung, HyukSu Han, Nguyen Quang Liem
Summary: This paper presents the systematic synthesis of AgInS2 nanocrystals with different sizes by controlling the reaction temperature. The synthesis process involves the synthesis of Ag2S nanocrystals followed by the exchange of Ag+ with In3+ to form AgInS2 nanocrystals. GaS is then shelled on the AgInS2 core to form core/shell structures. The synthesized AgInS2/GaS nanocrystals exhibit clear excitonic absorptions and strong, narrow excitonic luminescence.
Article
Chemistry, Physical
Michelle G. Barsukov, Cody L. Ritt, Igor V. Barsukov, Eva M. Syth, Menachem Elimelech
Summary: This study investigates the influence of graphite source on the yield of defect-free few-layer graphene (FLG). Different graphite types from various locations were examined and it was found that properties such as surface area and mineral impurities play a critical role in FLG yield. These findings are important for increasing the quantity of defect-free FLG for graphene-based research.
Article
Engineering, Electrical & Electronic
Eric A. Ponce, Steven B. Leeb
Summary: This paper discusses the use of internal mechanical motions to develop sensors for monitoring the operation state and diagnosing the health of dynamic systems. Bellows-and-diaphragm natural gas (BDNG) meters are used as an example to demonstrate how metering mechanisms can be transformed into high-quality flow meters. The methods presented in this paper can be applied to any dynamic machine for consumption estimation or fault detection, and can also be used with other nonintrusive field stimuli.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Ravindra Jha, Aman Nanda, Navakanta Bhat
Summary: By loading MoSe2 nanosheets on RGO sheets, the sensitivity and response time of the ammonia gas sensor were significantly improved in this study. The nanocomposite sensor showed a detection limit of 300 ppb, with a responsivity 2.6 times higher than that of the pure RGO sensor, and ultra-low power consumption.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Miao Liu, Ruiyang Sun, Zenghui Sima, Peng Song, Yongling Ding, Qi Wang
Summary: In this study, a facile method was used to prepare Au-In2O3/Ti(3)C(2)T(x )MXene composites, which exhibited significant sensitivity and excellent stability to formaldehyde at room temperature. The potential sensing mechanism of the composite sensor to formaldehyde was explored through density functional theory (DFT) simulations, providing an efficient tactic for the preparation of high-response formaldehyde-sensing materials for practical applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Ji Young Park, Yeonsu Kwak, Hyo-Ryoung Lim, Si-Woo Park, Min Seob Lim, Hong-Baek Cho, Nosang Vincent Myung, Yong-Ho Choa
Summary: In this study, a tunable and highly responsive methanol gas sensor device was developed using exfoliated graphene sheet (EGs) and ZnO quantum dots (QDs) on an aluminum anodic oxide (AAO) template. The device exhibited high sensitivity and fast response to methanol, thanks to the vertical electrode configuration of EGs-supported AAO and the enhanced polarization effect on the sensor surface achieved by the high surface area EGs and ZnO QDs with UV absorption capability.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Physics, Applied
Qiuliang Wang, Jianhua Liu, Jinxing Zheng, Jinggang Qin, Yanwei Ma, Qingjin Xu, Dongliang Wang, Wenge Chen, Timing Qu, Xingyi Zhang, Donghui Jiang, Yaohui Wang, Benzhe Zhou, Lang Qin, Huan Jin, Huajun Liu, Yujia Zhai, Feng Liu
Summary: This paper reports on the research status of UHF superconducting magnets in China from different perspectives, including design options, technical features, experimental progress, opportunities, and challenges.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Xingfan Li, Muhammad Riaz, Baiquan Song, Xilong Liang, Huajun Liu
Summary: The application of fomesafen herbicide in sugar beet crops has caused significant pollution. A study found that exogenous salicylic acid (SA) can alleviate the stress caused by fomesafen, promoting growth and photosynthetic performance in sugar beet seedlings. Furthermore, SA helps maintain cell membrane integrity by regulating antioxidant enzyme activities.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Materials Science, Multidisciplinary
Huanli Yao, Zhen Zhang, Chengtao Wang, Yingzhe Wang, Ze Feng, Jinrui Shi, Yalin Zhao, Hua Zhang, Chunyan Li, Rui Kang, Fang Liu, Huajun Liu, Rongjin Huang, Qingjin Xu
Summary: This paper investigates the effects of IR-3 impregnation on the performance of REBCO coils and compares it with other impregnating materials. The experimental results demonstrate that IR-3 impregnated REBCO coils exhibit superior electrical stability and no decay in critical current under thermal cycles and low-temperature high-field conditions.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Computer Science, Information Systems
Yajun Xia, Yuntao Song, Tao Ma, Jinxing Zheng, Huajun Liu, Fang Liu, Meng Song
Summary: This paper discusses the design and performance testing of a current-limiting superconducting cable, which is capable of transmitting high currents under low temperature and has successfully passed multiple tests.
Article
Materials Science, Composites
Lei Zhang, Yi Fan Chen, Huajun Liu, Benjamin Russell, Zi Wen Tham, Lin Ke, Uvarajan M. Velayutham
Summary: This paper introduces the use of shearography technique for real-time in-situ imaging of subsurface damage evolution in carbon fiber composites. Comparison with digital image correlation shows that shearography can provide better defect imaging results.
COMPOSITES COMMUNICATIONS
(2022)
Review
Nanoscience & Nanotechnology
Yecun Wu, Danfeng Li, Chun-Lan Wu, Harold Y. Hwang, Yi Cui
Summary: The doping or alteration of crystals to obtain desired properties has been a research frontier in materials science. However, the closely packed lattice structure in many crystals has limited the applicability of this strategy. The advent of 2D layered materials has revitalized interest in utilizing this approach through gating and intercalation, allowing reversible modulation of the host material's properties without breaking chemical bonds. These techniques have also enabled the synthesis of new hybrid materials.
NATURE REVIEWS MATERIALS
(2023)
Article
Chemistry, Physical
Chiheng Dong, Meng Han, Wenwen Guo, Xianping Zhang, Cong Liu, He Huang, Chao Yao, Dongliang Wang, Huajun Liu, Yanwei Ma
Summary: Iron-based superconducting wires fabricated by the powder-in-tube method with a stainless steel/ AgSn/Ag composite architecture and a scalable groove rolling process exhibit high-performance and dense superconducting filaments. The achieved critical current density is the highest reported in iron-based multifilament wires. Detailed analysis reveals the deformation mechanism of Ba0.6K0.4Fe2As2 grains and its influence on supercurrent transport properties, suggesting that higher critical current density can be achieved by improving grain texture. This method provides a simple and cost-effective approach to densify practical superconducting wires and can be scaled up to long wire productions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Qibin Zeng, Celine Sim, Anna Marie Yong, Hui Kim Hui, Yunjie Chen, Lei Zhang, Chee Kiang Ivan Tan, Huajun Liu, Kaiyang Zeng
Summary: During the past decade, Scanning Probe Microscopy (SPM) based surface strain detection techniques, referred to as Surface Strain Force Microscopy (SSFM), have been extensively used in the characterization of functional materials, structures, and devices. The development of SSFM has enabled the study of nanoscale physical properties by detecting local field-induced surface strain using a sharp tip. The introduction of multi-frequency SPM technology has further improved the performance and capabilities of SSFM, leading to the emerging of multi-frequency SSFM (MF-SSFM). MF-SSFM is expected to play an increasingly important role in future nanoscale characterization of physical properties.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Wenxiao Huang, Yusheng Ye, Hao Chen, Rafael A. Vila, Andrew Xiang, Hongxia Wang, Fang Liu, Zhiao Yu, Jinwei Xu, Zewen Zhang, Rong Xu, Yecun Wu, Lien-Yang Chou, Hansen Wang, Junwei Xu, David Tomas Boyle, Yuzhang Li, Yi Cui
Summary: This study demonstrates a nondestructive differential pressure sensing method for precise detection of lithium plating in fast-charging batteries. The method allows for early detection of the onset of lithium plating and can guide the development of fast-charging battery technologies.
NATURE COMMUNICATIONS
(2022)
Article
Plant Sciences
Xin Song, Baiquan Song, Jialu Huo, Huajun Liu, Muhammad Faheem Adil, Qiue Jia, Wenyu Wu, Abudukadier Kuerban, Yan Wang, Wengong Huang
Summary: Boron deficiency affects sugar beet production, and the use of nutrient-efficient varieties is an important solution. This study aimed to determine the effects of B deficiency on leaf phenotype and photosynthetic functions in B-efficient and B-inefficient sugar beet cultivars. The results showed that B-efficient cultivar had better adaptability to morphological changes and photosynthetic functions under B deficiency, providing theoretical basis for the selection of efficient sugar beet cultivars.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Kangho Lee, Beata M. Szydlowska, Oliver Hartwig, Kevin Synnatschke, Bartlomiej Tywoniuk, Tomas Hartman, Tijana Tomasevic-Ilic, Cian P. Gabbett, Jonathan N. Coleman, Zdenek Sofer, Marko Spasenovic, Claudia Backes, Georg S. Duesberg
Summary: Liquid-phase exfoliation (LPE) is a versatile and scalable method for producing two-dimensional (2D) materials. In this study, highly conductive films made of platinum diselenide (PtSe2) flakes were successfully fabricated using LPE. These films showed uniform morphology and electrical behavior, and were used to create a chemiresistive sensor structure capable of detecting ammonia gas at sub-0.1 parts per million (ppm) levels. Remarkably, the PtSe2-based devices remained fully functional even after 15 months, demonstrating their high stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Yue Zhao, Gang Wu, Kuan-Ming Hung, Jiung Cho, Miri Choi, Cormac O. Coileain, Georg S. Duesberg, Xiang-Kui Ren, Ching-Ray Chang, Han-Chun Wu
Summary: In this work, we fabricated field effect transistor gas sensors based on mechanically exfoliated van der Waals (vdW) layered materials and investigated their electrical field-dependent gas sensing properties. The results showed good agreement between experimental and theoretical values, indicating the validity of the Langmuir absorption model for vdW materials. Additionally, we demonstrated that the device sensing behavior strongly depends on carrier availability, leading to giant sensitivities and strong selectivity at the sensitivity singularity. Furthermore, our study revealed that these features can be utilized to quickly detect and differentiate low concentrations of mixed hazardous gases using sensor arrays.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xin Xiao, Zewen Zhang, Yecun Wu, Jinwei Xu, Xin Gao, Rong Xu, Wenxiao Huang, Yusheng Ye, Solomon T. Oyakhire, Pu Zhang, Baoliang Chen, Emre Cevik, Sarah M. Asiri, Ayhan Bozkurt, Khalil Amine, Yi Cui
Summary: Manganese-based aqueous batteries with Mn2+/MnO2 redox reactions are promising for grid-scale energy storage due to their high capacity, power capability, low cost, and safety. However, the insulating nature of deposited MnO2 limits the loading during charge/discharge cycles. This study investigates different MnO2 polymorphs and finds that increasing temperature can enhance conductivity, enabling ultrahigh loading of γ-MnO2 with great electrochemical performance. The results show a normalized loading of 33 mAh cm(-2) and long cycling stability at 20 mAh cm(-2) over 200 cycles with only 13% capacity loss.
ADVANCED MATERIALS
(2023)
Editorial Material
Physics, Applied
Qibin Zeng, Celine Sim, Anna Marie Yong, Hui Kim Hui, Yunjie Chen, Lei Zhang, Chee Kiang Ivan Tan, Huajun Liu, Kaiyang Zeng
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Kuanysh Zhussupbekov, Lida Ansari, Kenan Elibol, Ainur Zhussupbekova, Jani Kotakoski, Igor V. Shvets, Georg S. Duesberg, Paul K. Hurley, Niall Mcevoy, Cormac O'Coileain, Farzan Gity
Summary: The properties and performance of platinum diselenide (PtSe2) films, synthesized by thermally assisted conversion, were investigated using various spectroscopic and microscopic methods. The presence of distinct edge states was observed, and the origin of these states was investigated using theoretical tools and atomistic modeling. The results showed that the edges of polycrystalline films can have semiconducting or semimetallic properties depending on their configuration. The study also explored the potential of using a monomaterial heterojunction based field-effect transistor, which demonstrated excellent performance due to the critical role of the edge states in facilitating carrier transport.
APPLIED MATERIALS TODAY
(2023)