Article
Materials Science, Composites
Zijian Lu, Wei Wu, Dietmar Drummer, Yi Wang, Chao Liu, Shuo Li, Xintong Zhao
Summary: Studying new thermal conductivity fillers is important for practical thermal management applications. In this study, a multi-scale assembled thermal conductivity composite Al2O3-ZnO NWs/GO/EP was developed. The composite exhibited good thermal conductivity and mechanical properties with low content of fillers.
POLYMER COMPOSITES
(2023)
Article
Energy & Fuels
Steaphan M. Wallace, Wipakorn Jevasuwan, Naoki Fukata
Summary: Schottky junction photovoltaic devices were successfully assembled using nanowire shaped graphene sheets grown on-site onto nano-imprint lithography silicon nanowires, simplifying the fabrication process and improving power conversion efficiency. However, high recombination losses likely limited device performance in this simple system.
Article
Nanoscience & Nanotechnology
Cihyun Kim, Tae Jin Yoo, Kyoung Eun Chang, Min Gyu Kwon, Hyeon Jun Hwang, Byoung Hun Lee
Summary: The performance of a graphene/Ge Schottky junction near-infrared photodetector is significantly enhanced by inserting a thin Al2O3 interfacial layer between graphene and Ge. Dark current is reduced by two orders of magnitudes, and the specific detectivity is improved to 1.9 x 10(10) cm . Hz(1/2)W(-1). The responsivity is improved to 1.2 AW(-1) with an interfacial layer from 0.5 AW(-1) of the reference devices. The normalized photo-todark current ratio is improved to 4.3 x 10(7) W-1 at a wavelength of 1550 nm, which is 10-100 times higher than those of other Ge photodetectors.
Article
Nanoscience & Nanotechnology
Cihyun Kim, Tae Jin Yoo, Min Gyu Kwon, Kyoung Eun Chang, Hyeon Jun Hwang, Byoung Hun Lee
Summary: The structure of a gate-controlled graphene/germanium hybrid photodetector was optimized by splitting the active region, resulting in significantly improved infrared detection capability.
Article
Chemistry, Analytical
Raoul Joly, Stephanie Girod, Noureddine Adjeroud, Patrick Grysan, Jerome Polesel-Maris
Summary: The study investigates the presence of negative capacitance values in a system comprising metal-semiconductor-metal structures, demonstrating that the flow of electrons can be modulated by light and strain to control capacitance and conductance characteristics. A mechanism involving impact-loss process linked to the injection of hot electrons at the metal-semiconductor junction interface is proposed to be responsible for the appearance of negative capacitance values, offering new perspectives and applications for highly sensitive environmental sensors and impedance matching in radio frequency applications.
Article
Chemistry, Physical
A. S. R. A. Subki, M. H. Mamat, M. Z. Musa, M. H. Abdullah, I. B. Shameem Banu, N. Vasimalai, M. K. Ahmad, N. Nafarizal, A. B. Suriani, A. Mohamad, M. D. Birowosuto, M. Rusop
Summary: This work presents a nanocomposite-based humidity sensor that achieves enhanced sensing performance at room temperature by incorporating reduced graphene oxide (rGO) into zinc oxide nanostructured powder (ZNP) nanoparticles. The nanocomposite-based humidity sensor was fabricated using cellulose filter paper and clear paper glue through a brush printing method. Various characterization techniques were employed to investigate the properties of the nanocomposites. The sensor showed the highest sensitivity and sensing response when loaded with 1.0 wt% of rGO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Ankita Pathak, S. Samanta, B. Bhangare, Sinjumol K. Rajan, J. Bahadur, N. S. Ramgir, M. Kaur, A. Singh, A. K. Debnath
Summary: By modifying ZnO nanowire films with reduced graphene oxide, materials with selective and outstanding NO2 response can be obtained. The improved NO2 response of hybrid films is attributed to the synergetic balance of the depletion width at the ZnO/rGO interface with the Debye length.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Pavan K. Narayanam
Summary: The growth of ultra-thin luminescent reduced graphene oxide (rGO)-zinc oxide (ZnO) composite nanostructures was achieved through Langmuir-Blodgett (LB) transfer and subsequent oxidation. The layer structure and oxidation procedure determined the properties of the grown ZnO, such as size distribution, density, structural order, and optical quality. The introduction of specific compositing procedures and optimized oxidation conditions in this work facilitated the development of rGO-ZnO composite nanostructures with high optical, crystalline quality, and conductive characteristics, which is significant for optoelectronic device applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Zelia Alves, Claudia Nunes, Paula Ferreira
Summary: The study investigates the synthesis of zinc oxide nanostructures grown in situ on graphene oxide sheets using a solvothermal method with simultaneous reduction of the graphene oxide. It was found that the morphology of the zinc oxide particles is dependent on the precursor, while the particle size decreases with lower NaOH concentration and higher concentration of the GO suspension. Additionally, zinc oxide composites with higher amounts of GO suspension exhibit a lower band gap and higher specific surface area.
Article
Engineering, Electrical & Electronic
Aakash Kumar Jain, Aniket Singha
Summary: The proposed SC NW JLFET effectively reduces the detrimental leakage mechanisms and parasitic bipolar junction transistor action, leading to a significant improvement in device performance. Additionally, the Schottky junction helps to reduce short-channel effects, making the device promising for sub-10-nm technology nodes.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Environmental Sciences
Dibya Ranjan Rout, Hara Mohan Jena
Summary: In this study, a functionalized composite material RGO-PEG-ZnO was successfully synthesized for the adsorptive removal of phenolic pollutants from water, achieving a good removal effect. The composite material showed rapid adsorption and high adsorption capacity, making it an efficient adsorbent for treating phenolic pollutants from wastewater.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Abinash Das, Trinayana Deka, P. Mathan Kumar, Muthuraaman Bhagavathiachari, Ranjith G. Nair
Summary: The study focused on the preparation of Ag-ZnO composite at different weight percentages for photoelectrochemical water oxidation and photocatalytic dye degradation. The optimal catalyst showed superior performance due to surface plasmon resonance and synergistic improvement in optical response and charge carrier separation. The inclusion of Ag improved photocatalytic and water oxidation performance by affecting defect concentration and Schottky junction at the metal-metal oxide interface.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Environmental
Lijun Ding, Jie Wei, Yu Qiu, Yuan Wang, Zuorui Wen, Jing Qian, Nan Hao, Caifeng Ding, Yaqi Li, Kun Wang
Summary: The MoTe2 NPs/RGO heterostructures demonstrate excellent photoelectric performance and show promise as visible light-responsive materials for PEC biosensors. The label-free PEC aptasensor based on this material has a wide linear range and relatively low detection limit, showcasing its potential in the field of photoelectric sensing.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Anton Landstrom, Alessandro Gradone, Raffaello Mazzaro, Vittorio Morandi, Isabella Concina
Summary: The study investigated the impact of enwrapping reduced graphene oxide (rGO) in ZnO hierarchical microstructures on the photocatalytic performance. Various characterization tools were used to evaluate the changes in physical, optical, and electrical features, revealing the complexity of using graphene derivatives as supporters of semiconducting metal oxides functionality.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Binghui Xu, Longbiao Yu, Xu Zhao, Haoran Wang, Chao Wang, Lian Ying Zhang, Guanglei Wu
Summary: An effective method to synthesize zinc ferrite nanoparticles and prepare ZnFe2O4/RGO composite has been developed. The composite electrode shows excellent lithium-ion storage performance, with high reversible capacity and long cycle life, attributed to its well-designed structure and electrochemical behavior.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Hao Liu, Min-Ju Choe, Raul A. Enrique, Bernardo Orvananos, Lina Zhou, Tao Liu, Katsuyo Thornton, Clare P. Grey
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Electrochemistry
Hao Liu, Haodong Liu, Saul H. Lapidus, Y. Shirley Meng, Peter J. Chupas, Karena W. Chapman
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Hao Liu, Mark Wolf, Khim Karki, Young-Sang Yu, Eric A. Stach, Jordi Cabana, Karena W. Chapman, Peter J. Chupas
Article
Chemistry, Physical
Haodong Liu, Hao Liu, Ieuan D. Seymour, Natasha Chernova, Kamila M. Wiaderek, Nicole M. Trease, Sunny Hy, Yan Chen, Ke An, Minghao Zhang, Olaf J. Borkiewicz, Saul H. Lapidus, Bao Qiu, Yonggao Xia, Zhaoping Liu, Peter J. Chupas, Karena W. Chapman, M. Stanley Whittingham, Clare P. Grey, Ying Shirley Meng
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Article
Multidisciplinary Sciences
Wei Zhang, Hui-Chia Yu, Lijun Wu, Hao Liu, Aziz Abdellahi, Bao Qiu, Jianming Bai, Bernardo Orvananos, Fiona C. Strobridge, Xufeng Zhou, Zhaoping Liu, Gerbrand Ceder, Yimei Zhu, Katsuyo Thornton, Clare P. Grey, Feng Wang
Article
Nanoscience & Nanotechnology
Hao Liu, Saeed Kazemiabnavi, Antonin Grenier, Gavin Vaughan, Marco Di Michiel, Bryant J. Polzin, Katsuyo Thornton, Karena W. Chapman, Peter J. Chupas
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Hao Liu, Zhuo Li, Antonin Grenier, Gabrielle E. Kamm, Liang Yin, Gerard S. Mattei, Monty R. Cosby, Peter G. Khalifah, Peter J. Chupas, Karena W. Chapman
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2020)
Article
Chemistry, Multidisciplinary
Antonin Grenier, Philip J. Reeves, Hao Liu, Ieuan D. Seymour, Katharina Marker, Kamila M. Wiaderek, Peter J. Chupas, Clare P. Grey, Karena W. Chapman
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Krystal Lee, Carrie Siu, Marc F. Hidalgo, Jatinkumar Rana, Mateusz Zuba, Youngmin Chung, Fredrick Omenya, Louis F. J. Piper, Hao Liu, Natasha A. Chernova, M. Stanley Whittingham
Summary: Lithium vanadyl phosphate has a theoretical capacity of 305 mA h g(-1) but faces challenges in capacity retention at faster rates and sluggish kinetics in the high-voltage region. Cr substitution has been shown to enhance electrochemical performance for better Li-ion diffusion and reaction reversibility.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Electrochemistry
Ben Pei, Hui Zhou, Anshika Goel, Mateusz Zuba, Hao Liu, Fengxia Xin, M. Stanley Whittingham
Summary: Replacing manganese with aluminum through a continuous co-precipitation approach significantly enhances the electrochemical performance of NMC 811 cathodes. Among different Al% substituted samples, LiNi0.8Mn0.06Co0.1Al0.04O2 cathodes reduced the first capacity loss of pristine NMC 811 by 50% (18.0 vs 35.9 mAh g(-1)) and improved the capacity retention from 81.4% to 96.4% after 60 cycles at 0.5C in the voltage range of 2.8-4.4 V.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Review
Chemistry, Multidisciplinary
Hanlei Zhang, Hao Liu, Louis F. J. Piper, M. Stanley Whittingham, Guangwen Zhou
Summary: This article reviews recent progress in understanding the phenomena of oxygen loss and the resulting structural degradation in layered oxide cathodes. The major driving forces and associated structural degradation resulting from oxygen loss are presented. The kinetic pathways enabling oxygen loss and the resulting electrochemical fade are discussed, along with possible approaches to mitigate oxygen loss and novel analytical methods for probing oxygen loss.
Article
Nanoscience & Nanotechnology
Qinglu Fan, Mateusz Jan Zuba, Yanxu Zong, Ashok S. Menon, Anthony T. Pacileo, Louis F. J. Piper, Guangwen Zhou, Hao Liu
Summary: The surface structure and chemistry of the layered transition metal oxide cathode play a crucial role in its function and degradation. Modification of the surface using a chemical reduction method can improve the long-term capacity retention but compromise the rate capability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jiwei Wang, Grayson Hoteling, Robert Shepard, Matthew Wahila, Fei Wang, Manuel Smeu, Hao Liu
Summary: In this study, the structure features of the Co3+/Co2+ redox couple in Na2-xCoSiO4 phases were elucidated using high-resolution synchrotron X-ray diffraction and X-ray pair distribution function analysis. The results indicate that the formation of modulated structures is induced by Na+/vacancy and Co2+/Co3+ charge orderings, which is crucial for understanding the function and performance of sodium transition metal silicate electrodes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Yaosen Tian, Yingzhi Sun, Daniel C. Hannah, Yihan Xiao, Hao Liu, Karena W. Chapman, Shou-Hang Bo, Gerbrand Ceder
Article
Chemistry, Physical
Antonin Grenier, Hao Liu, Kamila M. Wiaderek, Zachary W. Lebens-Higgins, Olaf J. Borkiewicz, Louis F. J. Piper, Peter J. Chupas, Karena W. Chapman
CHEMISTRY OF MATERIALS
(2017)
