Article
Chemistry, Multidisciplinary
Anton A. Babaev, Ivan D. Skurlov, Sergei A. Cherevkov, Peter S. Parfenov, Mikhail A. Baranov, Natalya K. Kuzmenko, Aleksandra V. Koroleva, Evgeniy V. Zhizhin, Anatoly V. Fedorov
Summary: Lead chalcogenide nanoplatelets (NPLs) are a promising material for devices operating in the near IR and IR spectrum region. In this study, PbSe/PbS core/shell NPLs were synthesized using the cation exchange method. The shell growth improved the stability and passivated surface trap states of the NPLs. A photoconductor was fabricated using PbSe/PbS NPLs, demonstrating enhanced conductivity and responsivity with fast rise and fall times.
Article
Chemistry, Analytical
Xu-Xiu Chen, Li Chen, Gang Li, Liu-Xin Cai, Guang-Ya Miao, Zheng Guo, Fan-Li Meng
Summary: CdO-decorated porous ZnO nanobelts were prepared by ion exchange reaction and calcination, showing improved sensing performance to volatile organic compounds and enhanced selectivity to n-butanol. The gas sensors based on CdO-decorated porous ZnO nanobelts exhibited a low detection limit of less than 5 ppb, excellent stability, and repeatability for practical applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Zekun Shi, Xiaoli Lu, Xiaowen Tang, Dangpo Wang, Zhezhe Cong, Xiaohua Ma, Yue Hao
Summary: This study investigates the flexibility and strain-induced properties of AlN by fabricating a free-standing AlN film. It is found that bending strain can effectively reduce the bandgap of AlN film and flexible ultraviolet photodetectors show improved performance under bending stress.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Kai-Ge Zheng, Tian-Yu Yang, Zheng Guo
Summary: Partially cation exchanged porous Pb-doped ZnO nanobelts were prepared and showed excellent sensing performance with selectively enhanced response to n-butanol. The specific synergistic effect from the Pb dopant contributed to the results.
Article
Physics, Applied
Yuliang Mao, Jicai Deng, Hao Chen, Xin Wu
Summary: Germanium diselenide (GeSe2) nanobelts have been synthesized by atmospheric-pressure chemical vapor deposition using Se and Ge powders as precursor materials. The nanobelts exhibit growth directionality, forming tightly spaced, rectangular nanobelt arrays. The prepared GeSe2 material has a thickness of less than 5 nm and a single array can reach an area of 0.96 mm(2). The experimental results show that hydrogen directly affects the growth of GeSe2. First-principles calculations indicate the electronic properties and in-plane anisotropic optical absorption of the few-layer two-dimensional GeSe2 material. Optical absorbance measurements reveal high ultraviolet absorbance of GeSe2 nanobelt arrays (200-400 nm). Photodetectors based on GeSe2 nanobelts are p-type and demonstrate high responsivity, superior detectivity, and fast response time. These findings suggest that GeSe2 is an excellent UV photoelectric material with potential photoelectronic applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Clara Otero-Martinez, Muhammad Imran, Nadine J. Schrenker, Junzhi Ye, Kangyu Ji, Akshay Rao, Samuel D. Stranks, Robert L. Z. Hoye, Sara Bals, Liberato Manna, Jorge Perez-Juste, Lakshminarayana Polavarapu
Summary: This research reports the fast exchange of A-site cations between perovskite nanocrystals (NCs) made of different A-cations at room temperature. The exchange of A-cations is found to be as fast as the exchange of halide ions. It is shown that the optical properties of perovskite NCs can be finely tuned by the composition of A-cations, and different cations are evenly distributed in the lattice.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Xin Geng, Shuwei Li, Lalani Mawella-Vithanage, Tao Ma, Mohamed Kilani, Bingwen Wang, Lu Ma, Chathuranga C. Hewa-Rahinduwage, Alina Shafikova, Eranda Nikolla, Guangzhao Mao, Stephanie L. Brock, Liang Zhang, Long Luo
Summary: The study introduces a novel bimetallic PbCdSe quantum dot gel sensor with high sensitivity and fast response for detecting NO2 gas. By employing the strategy of atomically dispersed metal ions, the sensor achieves an optimal combination of response and recovery, leading to high performance in NO2 detection.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yangyang Bai, Yanting Ma, Shizheng Zheng, Cuiqing Zhang, Changyuan Hu, Baiping Liang, Yuling Xu, Guiping Huang, Ruofan Yang
Summary: This study successfully synthesized single crystal and oxygen vacancy-enriched α-MoO3-x nanobelts through a hydrothermal method, and revealed their higher specific capacitance and stronger adsorption capacity compared to stoichiometric MoO3. The improved electrochemical capability can be attributed to the presence of oxygen vacancies and the single crystal structure, which provide more exposed active sites and increased conductivity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Dalal Alezi, Julius J. Oppenheim, Patrick J. Sarver, Andrei Iliescu, Bhavish Dinakar, Mircea Dinca
Summary: The development of a tunable MOF for efficient atmospheric water capture across a range of uptake humidity conditions is a significant challenge. By controlling the metal and coordinating anion, the water uptake capacity can be increased and the relative humidity can be modulated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yuhao Liu, Lingmei Liu, Xu Chen, Yan Liu, Yu Han, Yong Cui
Summary: Highly ordered two-dimensional (2D) materials with in-plane nanopores are important for various applications, but their synthesis and characterization remain challenging. This study shows that ultrathin 2D MOF nanosheets with intrinsic porosity can be prepared by exfoliating layered MOFs. The nanosheets can be incorporated into polymer matrices to form mixed-matrix membranes, and their fluorescence can be quenched by chiral terpenes for chiral optical sensing applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Yuxuan Ling, Handong Ge, Jiawen Chen, Yuqi Zhang, Yunxia Duan, Minghui Liang, Yanjun Guo, Tai-Sing Wu, Yun-Liang Soo, Xiong Yin, Liming Ding, Leyu Wang
Summary: A general strategy for the fabrication of hydrophilic single atom catalysts (SACs) by cation-exchange approach is reported. The SACs are highly dispersible and stable in hydrophilic solvents, facilitating catalysis reactions in alcohols.
Article
Chemistry, Analytical
Jing Li, Fan Mo, Lei Guo, Junhua Huang, Zheng Lu, Qin Xu, Hongbo Li
Summary: The study proposes a novel design using 3-thiopropionic acid-capped CdTe quantum dots (QDs) for copper ion photoelectrochemical sensing, which offers a wider linear range and lower detection limit, as well as additional advantages in terms of cost-effectiveness, simplicity, and selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Shengnan Li, Tianyu Liu, Bing Yan
Summary: A multifunctional fluorescent material with ultrahigh stability has been successfully fabricated, which shows excellent performance in detecting 2-methoxyacetic acid and sulfide ions, and the quenching mechanism has been discussed.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Su Yunqi, Li Jiaming, Lin Guoming, Xie Kui
Summary: Porous single-crystalline molybdenum nitrides microcubes exhibit superior HER and OER performance, with significantly lower overpotential compared to single crystal and polycrystal molybdenum nitrides, displaying better electrochemical properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Xiaoyan Yu, Fangyuan Cheng, Xiuyun Duan, Kui Xie
Summary: By fabricating porous single-crystalline vanadium nitride and doping Fe and Co, the active sites at the surface were engineered. The material showed high-density active sites and remarkable stability, achieving outstanding performance in the nonoxidative dehydrogenation of ethane to ethylene.