Article
Physics, Applied
Ziqian Qi, Linning Wang, Yingze Liang, Pengzhan Liu, Hongbo Zhu, Yongjin Wang
Summary: This article introduces a solar-blind full-duplex light communication system using 275-nm DUV LEDs, which eliminates electromagnetic interference and solar noise. The system allows a maximum communication distance of 7 meters and supports real-time video and file sharing.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Youkui Zheng, Hong Li, Tongsheng Yang, Junpeng Li, Shuqing Yang, Jing Zhu
Summary: A single-phase white-emitting phosphor Bi4BPO10 (BBP):Dy3+ was synthesized via a solid-state reaction route, and it exhibits satisfactory thermostability and potential for application in solid-state white lighting sources.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jinpeng Huo, Guisheng Zou, Yu Xiao, Tianming Sun, Bin Feng, Daozhi Shen, Luchan Lin, Wengan Wang, A. Zhanwen, Lei Liu
Summary: This study demonstrates a novel BN-encapsulated CuO/MoS2 2D-1D van der Waals heterostructure photodetector with significantly improved interfacial contact and photodetection capabilities. The device shows highly sensitive, gate-tunable, and robust photoelectronic properties, and h-BN encapsulation effectively protects the device from electrical depletion by gas molecules, greatly improving stability and service life.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Ceramics
Dan Yang, Zhenyu Fang, Youkui Zheng, Yuefei Xiang, Ruitong Song, Tongsheng Yang, Jialiang Song, Jing Zhu
Summary: Microsized borophosphate-based phosphors of RbBaBP2O8:Sm were successfully prepared in this research, showing high thermal stability, good color stability, and low correlated color temperature, promising for applications in warm white LEDs.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xin Zhou, Li Zhang, Xiaodong Zhang, Yongjian Ma, Xing Wei, Tiwei Chen, Wenbo Tang, Kun Xu, Zhongming Zeng, Xinping Zhang, Houqiang Fu, BaoShun Zhang
Summary: In this work, ultrawide bandgap epsilon-Ga2O3/h-BCN heterojunctions were epitaxially grown on sapphire substrates by metalorganic chemical vapor deposition (MOCVD). The heterojunction was systematically studied by various material characterization techniques, revealing a clear interface and specific band alignment. This work provides valuable information on the epitaxial growth and band alignment of the heterojunction, expanding its potential in electronic and photonic applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Junkai Ren, Luigi Stagi, Luca Malfatti, Carlo Maria Carbonaro, Gaetano Granozzi, Laura Calvillo, Sebastiano Garroni, Stefano Enzo, Plinio Innocenzi
Summary: Hexagonal boron nitride (h-BN) nanodots of 10 nm have been successfully synthesized via top-down route, showing fluorescent emissions in both the UV and visible regions. Experimental results suggest that a specific combination of treatments is crucial for achieving UV emission, and quantum chemistry calculations indicate that Stones-Wales defects may be possible causes of the optical and vibrational properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Wei Wang, Weijun Wang, You Meng, Quan Quan, Zhengxun Lai, Dengji Li, Pengshan Xie, SenPo Yip, Xiaolin Kang, Xiuming Bu, Dong Chen, Chuntai Liu, Johnny C. Ho
Summary: A gate-tunable and anti-ambipolar phototransistor based on 1D GaAsSb nanowire/2D MoS2 nanoflake mixed-dimensional van der Waals heterojunctions is reported. The device shows asymmetric control over anti-ambipolar transfer characteristics, enabling electronic functions and gate-tunability of the photoresponse. It exhibits high-performance photodetection and photovoltaic response.
Article
Engineering, Environmental
Yunxiu Liu, Yu Tian, Qiuyang Han, Jie Yin, Junchuan Zhang, Yue Yu, Weizhong Yang, Yi Deng
Summary: The novel NIR-activated MXene/CoNWs heterojunctions demonstrate excellent antibacterial efficacy through NIR-triggered ROS and hyperthermia, while also showing acceptable cytocompatibility.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Chao Ding, Chengxiao Zhao, Shi Cheng, Xiaofei Yang
Summary: Rationally designing heterojunction photocatalysts with well-defined nanostructures and intimate interfacial contact significantly improves the photocatalytic hydrogen evolution reaction (HER) activity. The 1D CdS/2D MoSe2 heterostructure exhibited an enhanced hydrogen-evolving rate of 25.8 mmol g(-1) h(-1) with an apparent quantum efficiency of 30% at 420 nm, attributed to the synergistic effect between the CdS nanorods and MoSe2 nanosheets in accelerating electron-hole separation and interfacial charge transport. This study suggests that morphology control and interfacial engineering can effectively tune the efficiency and long-term stability of heterojunction photocatalysts for hydrogen production, providing insights for robust high-performance visible light photocatalysts.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Keng Chen, Huazhang Guo, Jiye Zhang, Liang Wang, Minghong Wu
Summary: This work focuses on the development of a highly efficient photocatalyst for clean hydrogen production. The metal-free 2D/2D boron/g-C3N4 nanosheet heterojunction (B-CN) was designed and synthesized, which showed a hydrogen generation rate 35 times higher than g-C3N4. The tight heterojunction architecture allows for enhanced light absorption, increased carrier concentration, and efficient charge transfer, leading to improved photocatalytic activity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Optics
Orhan Ozdemir, Hanife Bas, Neslihan Ayarci Kuruoglu, Kutsal Bozkurt, Mustafa Aydin, Fahrettin Sarcan, Ayse Erol, Bandar Alshehri, Karim Dogheche, Elhadj Dogheche
Summary: Temperature-dependent photoluminescence and surface photovoltage measurements were performed on InGaN/GaN quantum well blue light-emitting devices. The emissions, peaking at 3.03 eV and 2.89 eV, showed an S-shaped behavior with temperature, decreasing-increasing-decreasing from 30-150 K, and then saturating above 150 K. The first variation below 150 K was attributed to composition fluctuation of In atom in the InGaN MQW layer, while the second significant shift in peak energy was caused by localization effect. The strong localization effect was also responsible for negative capacitance in admittance spectroscopy measurement.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
Tuhin Kumar Maji, Kumar Vaibhav, Anna Delin, Olle Eriksson, Debjani Karmakar
Summary: This study highlights the enhanced electronic and optical functionalization in the hybrid heterojunction of one-dimensional tellurene with a two-dimensional monolayer of graphene and MoS2, and indicates their potential applications in broadband photodetection, absorption, and green energy harvesting.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Moumita Chandra, Utsab Guharoy, Debabrata Pradhan
Summary: The present research focuses on improving the efficiency and sustainability of solar-to-chemical energy conversion. By utilizing nanostructured materials, the water splitting technology has been revolutionized to produce decoupled hydrogen and value-added organic chemicals simultaneously. Through theoretical modeling and experimental verification, a non-noble metal-based catalyst has been demonstrated to exhibit high efficiency in successful redox reactions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Bo Wang, Hao-Zhi Qian, Yin Peng
Summary: Novel 2D/1D Bi12O17Cl2/beta-Bi2O3 heterostructures were synthesized by calcining Bi(OHC2O4)center dot 2H(2)O/BiOCl precursors, exhibiting higher photocatalytic activity due to improved interface quality and enhanced charge separation and transfer rate. Radical scavenger experiments show that photogenerated holes and O-2(-) play key roles in the photodegradation process.
Article
Chemistry, Multidisciplinary
Yuliang Mao, Zheng Guo, Jianmei Yuan, Tao Sun
Summary: Based on first-principles calculations, van der Waals heterojunctions consisting of CNTs and GeSe were proposed, showing different stabilities, metallic properties, and bandgap sizes for (n,0)CNT/GeSe. Additionally, (11,0)CNT/GeSe exhibited a high photoelectric conversion efficiency and potential applications in photoelectronics.
Article
Chemistry, Physical
Sayan Bayan, Sourabh Pal, Samit K. Ray
Summary: In this study, a textile-based triboelectric nanogenerator (T-TENG) was developed using silver nanoparticles and a nylon layer. The T-TENG showed enhanced triboelectric characteristics and could generate high voltage and electrical output under mechanical agitation. The T-TENG also exhibited stability at higher operating temperatures and higher power conversion efficiency, making it a potential candidate for integration into textile-based wearable electronic devices.
Article
Nanoscience & Nanotechnology
Susmita Mondal, Sayan Bayan, Ria Ghosh, Monojit Das, Aniruddha Adhikari, Dipanjan Mukherjee, Asim Kumar Mallick, Samit Kumar Ray, Samir Kumar Pal
Summary: This study reports the synthesis of citrate-capped C3N4 nanodots and their potential application as a nanomedicine against lead poisoning. The nanodots can generate a significant amount of reactive oxygen species and effectively bind to Pb(II), eliminating it from circulation. They also have the potential to protect cellular components from ROS-associated damages.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Soni Ngadong, Tani Chekke, Ringshar Narzary, Sayan Bayan, Upamanyu Das
Summary: A nanocomposite consisting of CuO and PVDF-HFP has been fabricated for flexible piezoelectric nanogenerators. The incorporation of optimal CuO nanostructures in PVDF-HFP increases the output voltage of the nanogenerator. Furthermore, the nanogenerator exhibits high power and can be enhanced under illumination condition.
Article
Chemistry, Multidisciplinary
Ajoy Mandal, Samik Mallik, Sovanlal Mondal, Suvani Subhadarshini, Riya Sadhukhan, Tanmay Ghoshal, Suman Mitra, Mousam Manna, Suman Mandal, Dipak K. Goswami
Summary: Rapid and accurate identification of pathogens is crucial for controlling disease spread. This study introduces a sensor based on the OFET platform that utilizes ACE2 molecules as receptor molecules for the SARS-CoV-2 virus. The sensor achieves 94% sensitivity and less than one minute detection time, using saliva samples without the need for sample preparation. A prototype module for remote monitoring has also been developed, confirming suitability for large-scale testing in crowded areas.
Article
Nanoscience & Nanotechnology
Tai Mayu, Ringshar Narzary, Tani Chekke, Upamanyu Das, Sayan Bayan
Summary: This study reports on the fabrication of a flexible and cost-effective single electrode triboelectric nanogenerator (STENG) based on zinc oxide (ZnO) nanorods on a cellulose paper platform. The influence of surface functional groups of ZnO nanorods on the STENG output was investigated. It was found that post-annealing of nanorods improves the output voltage, while oxygen accumulation reduces the output. The optimized STENG was demonstrated to work as a wearable biomechanical sensor.
INTERNATIONAL JOURNAL OF NANOSCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Tani Chekke, Ringshar Narzary, Soni Ngadong, Biswarup Satpati, Sayan Bayan, Upamanyu Das
Summary: We report on the fabrication of a tungsten disulphide (WS2) nanosheet-based single-electrode triboelectric nanogenerator (STENG) for possible application in nanoscale power generators and motion sensors. The STENG device with the WS2-PTFE pair exhibits the highest open-circuit voltage (V-oc) of about 11.02 V and delivers a maximum output power of about 1.7 mu W. The STENG demonstrates its potential as a force sensor and motion sensor for tactile and motion sensing applications, respectively.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Tani Chekke, Ringshar Narzary, Soni Ngadong, Biswarup Satpati, Sayan Bayan, Upamanyu Das
Summary: We have fabricated a self-powered Au decorated WS2-based single-electrode triboelectric nanogenerator (STENG) for potential application as a photodetector. The flexible and wearable STENG was constructed on a cellulose paper and PVA membrane substrate. Different triboelectric counter layers including Al and PTFE were used to investigate the triboelectric operation, and it was found that the Au-WS2-PTFE STENG generated the highest output voltage among all the counter electrode systems. The device exhibited a maximum power of 1.4 μW and was capable of accumulating a charge of up to 64 nC within 3 seconds. The STENG showed higher output voltage in the presence of light compared to dark conditions, and demonstrated photo-detection property with a sensitivity of 0.4 Vm2/W. The measured voltage in the UV to visible region suggested that the photodetector could be utilized in broadband applications. The excellent durability and long-term stability of the fabricated STENG indicated its potential for long-term performance, and this study could lead to the development of a prototype WS2-based self-power photodetector for the next generation.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Sayan Bayan, Sourabh Pal, Samit K. Ray
Summary: In this study, a boron carbonitride (BxCyNz) nanosheets based single electrode triboelectric nanogenerator (STENG) was fabricated for UV photodetection. The properties of the BxCyNz material were characterized using microscopy and spectroscopy. The STENG showed excellent photoresponsivity and a capacitive voltage growth mechanism, which can be used as an alternative method for photodetection.
APPLIED MATERIALS TODAY
(2023)
Article
Nanoscience & Nanotechnology
Samik Mallik, Shyam Chand Pal, Snehanjan Acharyya, Shiv Prakash Verma, Ajoy Mandal, Prasanta Kumar Guha, Madhab C. Das, Dipak Kumar Goswami
Summary: The selective and rapid detection of trace amounts of highly toxic chemical warfare agents using metal-organic frameworks (MOFs) is imperative for military and civilian defense. However, efficiently using MOFs as electronic devices has been challenging. In this study, a new approach integrating MOF as a receptor in a pentacene semiconducting film for sensor fabrication was reported. The resulting sensors showed a strong response toward diethyl sulfide, a stimulant of the highly toxic sulfur mustard, making them potential candidates for real-time detection of sulfur mustard below 10 ppm.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Monojit Mondal, Dipak Kumar Goswami, Tarun Kanti Bhattacharyya
Summary: The obstacles faced by flexible batteries and their lower specific power have improved the position of flexible supercapacitors as a new efficient solution for energy storage. Supercapacitors have desirable attributes such as specific energy, long-cycle stability, and rapid ion transport, making them important candidates for energy storage devices. In this study, Ni4CuO5-mw-CNT and rGO-FeVO3 were fabricated using a solvothermal process to create high-energy asymmetric solid-state supercapacitors. The synthesized oxide was analyzed using various techniques to confirm its phase and structural features. An asymmetric supercapacitor device consisting of Ni4CuO5-mw-CNT as the cathode and rGO-FeVO3 as the anode was assembled and exhibited high specific capacitances, long-cycle stability, and rate capabilities. The device achieved a maximum specific energy and specific power density, as well as a high retention of capacitance after 10,000 cycles, due to its porous morphology network.
Article
Chemistry, Physical
Bikash Baro, Sammun Khimhun, Upamanyu Das, Sayan Bayan
Summary: This study reports the fabrication of a textile-based wearable sweat sensor utilizing the principle of triboelectrification. The single electrode triboelectric nanogenerator (STENG) composed of zinc oxide (ZnO) nanorods on a textile platform was explored for sweat sensing application, showing promising results in terms of motion sensing and sensitivity to changes in saline water concentration. A miniaturized proof of concept prototype of the STENG was developed and found to be efficient in sweating conditions when attached to the human body. Additionally, the integration of the textile-based STENG with a microcontroller unit enabled remote sensing of the generated signals.
Article
Chemistry, Multidisciplinary
Ajoy Mandal, Suman Mandal, Shiv Prakash Verma, Samik Mallik, Subhendu Sekhar Bag, Dipak K. Goswami
Summary: This work demonstrates the control of peptide-based receptor molecule growth in grain boundaries of pentacene semiconducting films to maintain crystallinity and improve device performance.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Abhijit Narayan Eshore, Sayan Dey, Dipak Kumar Goswami, Prasanta Kumar Guha
Summary: This study reports the formation of a crystallographic junction consisting of (002) and (110) oriented crystals of bismuth ferrite (BFO) for ultrasensitive carbon monoxide (CO) detection. The growth orientation and crystallinity of the solution-processed BFO were controlled by varying calcination times. The junction-based sensor showed a significantly higher response and specificity for CO compared to other chemically compatible species, and demonstrated excellent stability during continuous testing.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sourav Pratim Das, Rimlee Bhuyan, Bikash Baro, Upamanyu Das, Rupam Sharma, Sayan Bayan
Summary: In this study, a self-powered human motion detector based on triboelectric nanogenerator (TENG) with chemically developed Au-g-C3N4/ZnO based nanocomposite on cellulose paper platform was developed. The hierarchical morphology of the nanocomposite showed higher output voltage, which was attributed to the contribution of Au and ZnO in increasing dielectric constant and surface roughness. The flexible TENG exhibited power generation of approximately 3.5 μW cm(-2) and sensitivity of approximately 3.3 V N-1, and could detect human body movement and its frequency. Machine learning techniques were used to accurately predict body movement based on data from multiple TENG sensors, with accuracy of 99% and 100% achieved using artificial neural network and random forest classifier, respectively. The hierarchical structure-based flexible TENG sensor demonstrated superior sensitivity and accuracy in biomechanical motion recognition using machine learning.
Article
Engineering, Electrical & Electronic
Arindam Pal, Murali Gedda, Dipak K. Goswami
Summary: Phenyl-substituted perylene diimide derivative N,N-diphenyl perylene tetracarboxylic diimide (PTCDI-Ph) has been used as a single-component organic material to fabricate an efficient photodetector. The structure formation of one-dimensional microneedles composed of stacks of molecular layers is due to the lower diffusion activation energy of the molecules along the length of the microneedles. The high substrate temperature leads to enhanced diffusion of the molecules, reducing traps and improving the photoresponse.
ACS APPLIED ELECTRONIC MATERIALS
(2022)