Article
Chemistry, Multidisciplinary
Yun Cai, Fengyu Yuan, Fan Li, Huihui Kang, Daxiang Xue, Siping Huo, Fengjiao Yu, Jun Fang, Yang Yang
Summary: The Au/TiO2-based system with the right combination of electronic configuration, structural dynamics, and stability has attracted wide attention in PEC water splitting for hydrogen generation. In this study, Au nanoparticles were used to fabricate TiO2 nanowire arrays, resulting in significantly increased photocurrent density and improved PEC activity towards water oxidation when used as a photoanode. The dewetted Au nanoparticles played dual functions in regulating and passivating the TiO2 nanowires, leading to efficient charge carrier generation, transfer, and separation for boosted PEC water oxidation performance.
Article
Chemistry, Multidisciplinary
Aijian Wang, Xiaoliang Shen, Yun Wang, Qi Wang, Laixiang Cheng, Xiaodong Chen, Cuncai Lv, Weihua Zhu, Longhua Li
Summary: A series of FeOx-MoP@MWCNT composite electrocatalysts were designed and prepared to investigate the influence of FeOx content on water splitting performance. The optimized FeOx-MoP@MWCNTs-2 demonstrated excellent activity for hydrogen and oxygen evolution reactions, achieving a cell voltage of 1.51 V and outstanding stability due to the synergistic effect of each component, as confirmed by experimental and density functional theory results. The observed electrocatalytic activity surpassed current state-of-the-art non-precious metal electrocatalysts.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Medicinal
Adriana Adamczyk, Ewelina Matuszyk, Basseem Radwan, Stefano Rocchetti, Stefan Chlopicki, Malgorzata Baranska
Summary: Multiple diseases are associated with altered endothelial function, and endothelial dysfunction contributes to their pathophysiology. Biochemical changes of the dysfunctional endothelium are linked to various cellular organelles, requiring organelle-specific insight for better understanding. Raman imaging, combining chemical specificity with microscopic resolution, is useful for detecting biochemical changes in ED at the cellular level.
JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Baris Akbali, Cedric Boisdon, Barry L. Smith, Boonphop Chaisrikhwun, Kanet Wongravee, Tirayut Vilaivan, Cassio Lima, Chen-Han Huang, Tsan-Yao Chen, Royston Goodacre, Simon Maher
Summary: In this study, we investigated the use of electrospray deposition (ESD) combined with ambient focusing DC ion funnel to deposit high-density and intact non-spherical gold nanoparticles (AuNPs) for highly sensitive surface-enhanced Raman scattering (SERS) analysis. Our SERS substrate exhibited excellent capture capacity for analyte molecules with detection limits in the region of 10(-11) M and demonstrated excellent linearity over a wide concentration range.
Article
Chemistry, Multidisciplinary
Yongtao Xu, Bingdong Yan, Caiyan Lai, Mingyu Wang, Yang Cao, Jinchun Tu, Delun Chen, Youbin Liu, Qiang Wu
Summary: In this study, a ZnO/ZnS nanocluster heterojunction photoelectrode with surface oxygen defects (Vo-ZnO/ZnS) was prepared using an in situ anion substitution and nitrogen atmosphere annealing method. The synergy between defect and surface engineering significantly improved the photocatalytic performance of Vo-ZnO/ZnS, allowing it to have a longer carrier lifetime, narrower band gap, higher carrier density, and better electron transfer under light conditions compared to ZnO. Vo-ZnO/ZnS also demonstrated excellent performance as a photocathode in a photoelectric sensor system for glucose detection, with a low detection limit, high sensitivity, and wide detection range.
Review
Chemistry, Multidisciplinary
Xiaofei Shi, Siming Zhao, Fei Wang, Qinyuan Jiang, Chenhao Zhan, Run Li, Rufan Zhang
Summary: Direct visualization and imaging of nanomaterials under ambient conditions is important for their characterization and application. Optical microscopes are more convenient than electron microscopes, but have lower resolution. Effective imaging strategies are needed for accurate location and manipulation of nanomaterials.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Daniel Amgar, Gur Lubin, Gaoling Yang, Freddy T. T. Rabouw, Dan Oron
Summary: Semiconductor nanocrystal emission polarization is a crucial factor for nanocrystal-based technologies. A direct characterization method of the doubly excited-state relaxation transition dipole is proposed using heralded defocused imaging. The results reveal different transition dipole moments for different types of nanorods.
Article
Nanoscience & Nanotechnology
Mazen Erfan, Martine Gnambodoe-Capochichi, Yasser M. Sabry, Diaa Khalil, Yamin Leprince-Wang, Tarik Bourouina
Summary: The integration of zinc oxide nanowires into a microfluidic chamber presents technological challenges and scientific opportunities explored in this study. By utilizing a unique experimental platform combining optical characterization with a microfluidic reactor, researchers were able to monitor the in situ growth of nanowires in real-time and assess their uniformity in a tiny microchamber. Factors such as flow rate and continuous renewal of the growth solution were observed to affect the diameter and length of the nanowires, demonstrating the synergetic effects of the chemical reaction environment.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Zhaobing Lu, Hui Wang, Yinghao Tao, Sheng Zhu, Weiju Hao, Xinjuan Liu, Yulin Min, Jinchen Fan
Summary: The electrocatalytic nitrogen reduction reaction is a sustainable and green alternative to the traditional process, but its catalytic performance is limited by the chemical inertness of nitrogen gas and the competitive hydrogen evolution reaction. A high-performance catalyst WOx/NPC was prepared to overcome these limitations and exhibited high stability and efficiency.
Article
Chemistry, Multidisciplinary
Lei Xie, Jinrong Liu, Xiaobing Bao, Jiadong Chen, Xiaozhong Zheng, Yanjun He, Wei Zhang, Jie Zeng, Yong Wang, Biao Kong
Summary: This study reports the synthesis of biomass-derived nanowire-arrays based mesoporous nanorods and teeth-like superstructures using a simple and straightforward polyelectrolyte-assisted soft-templating hydrothermal carbonization (HTC) approach. The polyelectrolyte plays a crucial role in stabilizing and directing the assembly of micelles, nanowires, and nanorods, leading to the successful production of supported catalysts for the hydrogen evolution reaction with improved performance compared to isotropic nanospheres based catalysts. This HTC approach presents new opportunities for the synthesis of anisotropic materials with various morphologies and dimensions, expanding the potential applications of these materials.
Article
Chemistry, Inorganic & Nuclear
Xiaoyi Zhao, Ke Yang, Yu Gong, Jiayi Wang, Zhongjun Chen, Xueqing Xing, Zhonghua Wu
Summary: In this study, orientationally aggregated CoOOH nanosheets and self-assembled strings of CoOOH nanodiscs were successfully prepared by hydrothermal method. The formation and self-assembly mechanisms of CoOOH nanodiscs were investigated using various techniques and calculations. The results provide meaningful insights into the controllable preparation of CoOOH nanomaterials.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yuchen Sun, Xiaowei Wang, Ahmad Umar, Xiang Wu
Summary: Transition metal molybdates are important electrode materials for supercapacitors. In this study, Ni1-xCoxMoO4·nH2O nanostructures with high specific capacitance and excellent electrochemical activity were successfully prepared through hydrothermal methods. The obtained electrode materials showed high energy density and excellent cycling and mechanical stability.
Article
Materials Science, Multidisciplinary
Juan Yao, Ludan Zhang, Hongli Zhao, Zhitao Chen, Tengfei Bi, Huan He, Xiaoming Shen, Yuechun Fu
Summary: In this study, ZnO nanowires were successfully grown on p-Si substrates using the hydrothermal method, and a self-powered ultraviolet photodetector was constructed. The morphology and performance of the ZnO nanowires changed with increasing growth time.
Article
Chemistry, Multidisciplinary
Zhiheng Lyu, Shangqian Zhu, Lang Xu, Zitao Chen, Yu Zhang, Minghao Xie, Tiehuai Li, Shan Zhou, Jingyue Liu, Miaofang Chi, Minhua Shao, Manos Mavrikakis, Younan Xia
Summary: This study successfully synthesized Pd-Cu Janus nanocrystals with controlled shapes, showing superior catalytic performance in the electrochemical reduction of CO2. Insights obtained in this work could guide the rational design and fabrication of bimetallic nanocrystals with desired properties for catalytic applications in the future.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Houfeng Zhang, Shenglong Gan, Dongfang Hou, Xiu-qing Qiao, Ruan Chi, Dong-Sheng Li
Summary: The optimization of charge-transfer pathway is crucial in a capable photocatalytic system. In this study, we synthesized Vo-ZnWO4/CdS-Ni Z-scheme photocatalysts to change the interface charge-transfer pathway and enhance the photocatalytic activities and stability. The introduction of oxygen vacancies and Ni particles led to a feasible and efficient Z-scheme band alignment, addressing the poor activity and stability issues.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Ujwal K. Thakur, Pawan Kumar, Sergey Gusarov, Alexander E. Kobryn, Saralyn Riddell, Ankur Goswami, Kazi M. Alam, Spencer Savela, Piyush Kar, Thomas Thundat, Alkiviathes Meldrum, Karthik Shankar
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Rubye H. Farahi, Aude L. Lereu, Anne M. Charrier, Udaya C. Kalluri, Brian H. Davison, Ali Passian
Article
Nanoscience & Nanotechnology
Kazi M. Alam, Pawan Kumar, Sergey Gusarov, Alexander E. Kobryn, Aarat P. Kalra, Sheng Zeng, Ankur Goswami, Thomas Thundat, Karthik Shankar
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Mohammad Moein Mohammadi, Abhishek Kumar, Jun Liu, Yang Liu, Thomas Thundat, Mark T. Swihart
Article
Nanoscience & Nanotechnology
Abhishek Kumar, Mohammad Moein Mohammadi, Yaoli Zhao, Yang Liu, Jun Liu, Thomas Thundat, Mark T. Swihart
Summary: A hydrogen (H-2) sensor based on a Pd NWs @ rGO @ ZIF-8 nanocomposite has been developed, showing high sensitivity and rapid response to 1% H-2 in air through optimized design.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Syed A. Bukhari, Ryan McGee, Amirhossein Mahdavi, Farid Bensebaa, Liang Zhou, Hyun-Joong Chung, Thomas Thundat, Ankur Goswami
Summary: Vanadium dioxide (VO2) exhibits an insulator to metal transition at 68 degrees C, displaying significant changes in multiple physical properties. By precise strain engineering, the transition temperature can be reduced. A noncontact, all-optical platform is demonstrated to study macroscopic dynamics related to localized structural rearrangements. Multiple stable frequencies of the resonator can be activated at different optical powers and wavelengths, showing potential applications in ultrafast optical switching and intelligent temperature sensors.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Abhishek Kumar, Yaoli Zhao, Mohammad Moein Mohammadi, Jun Liu, Thomas Thundat, Mark T. Swihart
Summary: Palladium nanosheets (PdNS) show promising performance in gas sensing applications, especially for detecting H-2 and CO at room temperature. Compared to pure Pd-based sensors, using multiwalled carbon nanotube@PdNS (MWCNT@PdNS) composites can enhance sensor performance.
Article
Chemistry, Multidisciplinary
Abhishek Kumar, Yaoli Zhao, Shema Rachel Abraham, Thomas Thundat, Mark T. Swihart
Summary: A low-cost sensor using Pd alloy nanosheets on paper is developed for sensitive detection of hydrogen gas. The sensor exhibits improved stability and lower detection limit compared to conventional interdigitated electrode-based sensors. This simple manufacturing method opens up possibilities for widespread use in fuel-cell vehicles and related infrastructure.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Abhishek Kumar, Thomas Thundat, Mark T. Swihart
Summary: One-dimensional nanomaterials are widely studied for gas-sensing applications due to their high surface-to-volume ratio and efficient electron transport pathways. In this study, ultrathin PdNWs were synthesized using colloidal solvothermal synthesis and a sensor with fast response, recovery times, stability, and high selectivity for H-2 was fabricated.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Abhishek Kumar, Kaiwen Chen, Thomas Thundat, Mark T. Swihart
Summary: This paper presents a paper-based sensor using ultrathin palladium nanowires for room-temperature hydrogen detection. The polycrystalline PdNWs showed a response of 4.3% and the quasi-single-crystalline PdNWs showed a response of 8% to 1 vol% H2. The sensor demonstrates excellent selectivity, stability, and sensitivity, and has the potential to be a low-cost alternative to current H2-sensing solutions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yaoli Zhao, Patatri Chakraborty, Ali Passian, Thomas Thundat
Summary: Molecular-level spectroscopy is essential for sensing and imaging applications, but the detection and quantification of minuscule quantities of chemicals are challenging, particularly when they adsorb in low numbers. In this study, a photothermal spectroscopic technique utilizing a microfabricated nanoscale thermocouple junction integrated into a microcantilever was introduced for high selectivity sensing of adsorbates with an attogram detection limit. The temperature variation driving the thermoelectric junction is caused by the nonradiative decay of molecular adsorbates' vibrational states on the tip. The detection of photothermal spectra of physisorbed trinitrotoluene (TNT) and dimethyl methylphosphonate (DMMP) molecules, as well as representative polymers, with an estimated mass of 10^(-18) g was demonstrated.
Article
Engineering, Electrical & Electronic
Sheng-Joue Young, Yi-Hsing Liu, M. D. Nahin Islam Shiblee, Kumkum Ahmed, Lin-Tzu Lai, Larry Nagahara, Thomas Thundat, Tsukasa Yoshida, Sandeep Arya, Hidemitsu Furukawa, Ajit Khosla
ACS APPLIED ELECTRONIC MATERIALS
(2020)
Article
Electrochemistry
Seonghwan Kim, Thomas Thundat
ELECTROCHEMICAL SOCIETY INTERFACE
(2019)
Article
Chemistry, Multidisciplinary
Jun Liu, Keren Jiang, Lan Nguyen, Zhi Li, Thomas Thundat
MATERIALS HORIZONS
(2019)
Article
Chemistry, Multidisciplinary
Kamalesh Chaudhari, Tripti Ahuja, Vasanthanarayan Murugesan, Vidhya Subramanian, Mohd Azhardin Ganayee, Thomas Thundat, Thalappil Pradeep