Article
Chemistry, Physical
Dong-Hoon Yang, Jae-Hun Kim, Ali Mirzaei, Hyoun Woo Kim, Sang Sub Kim
Summary: In this study, WS2 nanosheets were co-decorated with In2O3 and Au nanoparticles to fabricate CO gas sensors, which were operated in self-heating mode at low temperature to reduce power consumption. It was found that the co-decorated gas sensor exhibited higher sensing performance and selectivity compared to bare WS2 nanosheets, due to the resistance modulation from In2O3-WS2 heterojunctions and the catalytic effect of Au nanoparticles on oxygen dissociation and CO adsorption.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Duan Zhang, Xiaodie Yang, Yujian Shen, Longkun Yang, Oscar Leonardo Camargo Moreira
Summary: Gas sensing devices are important for safety production, environment protection, and human health. Two-dimensional layered materials have been widely used for gas sensor design, and sensitivity and selectivity are major concerns. This study shows that the sensitivity and selectivity of SnSe2 gas sensors can be manipulated by decorating them with Au nanoparticles. The findings deepen our understanding of SnSe2 gas sensing mechanisms and provide an effective strategy for designing high-performance and low-cost gas sensors.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Hongying Lin, Junhe Wang, Shiqiang Xu, Qiang Zhang, Yongqiang Cheng, Dan Han, Hongtao Wang, Kai Zhuo
Summary: By functionalizing Au into WO3 nanofibers, the effect of different Au layer thicknesses on the sensor performance was studied. It was found that the 10 nm Au-WO3 composite nanomaterial sensor exhibited the most significant improvement, with optimal operating temperature at 175℃, excellent selectivity, and high sensitivity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Chujun Yao, Li Wu, Hua Li, Ning Xu, Jian Sun, Jiada Wu
Summary: In this study, WS2/Au/ZnO nanorods were synthesized and evaluated as gas sensors with improved sensing performance for NO2 gas under light activation. The WS2/Au/ZnO nanorod-based sensor exhibited better performance compared to the bare ZnO nanorod-based sensor under 365 or 455 nm light activation.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Shah Zeb, Xiujing Peng, Yushu Shi, Jianhui Su, Junhua Sun, Miaomiao Zhang, Guoxin Sun, Yong Nie, Yu Cui, Xuchuan Jiang
Summary: This study developed a simple and effective method to deposit bimetal Au-Pd nanoparticles onto WO3 nanowires, enhancing the sensitivity to n-butanol gas. The addition of Pd decoration significantly reduced the operating temperature of the WO3 sensor and improved the sensing performance for n-butanol gas in VOCs.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Jae-Hun Kim, Isao Sakaguchi, Shunich Hishita, Taku T. Suzuki, Noriko Saito
Summary: A new ternary structure was designed to enhance the sensing properties of WS2 nanosheet-based gas sensors at room temperature in self-heating mode. SnO2 nanowires were added to WS2 nanosheets and Au nanoparticles were deposited on the surface of the resulting composites. The presence of SnO2 nanowires effectively enhanced the diffusion and adsorption of gas species, while the chemical sensitization of Au contributed to an enhanced response to CO gas. The results showed the potential of the Au-decorated SnO2-WS2 as a low-power, low-voltage CO gas sensor in wet environments.
Article
Chemistry, Multidisciplinary
Lei Shangguan, Long-Bing He, Sheng-Pan Dong, Yu-Tian Gao, Qian Sun, Jiong-Hao Zhu, Hua Hong, Chao Zhu, Zai-Xing Yang, Li-Tao Sun
Summary: In this paper, a facile method for fabricating β-Ga2O3 nanotubes using GaSb nanowires as sacrificial templates is reported. The length, diameter, and thickness of the nanotubes can be customized by using different GaSb nanowires and heating parameters. It is found that the Kirkendall effect and the sublimation process play critical roles in the transformation dynamics of the β-Ga2O3 nanotubes. The obtained β-Ga2O3 nanotubes exhibit promising photoelectric properties with high photoresponsivity and detectivity.
Review
Chemistry, Inorganic & Nuclear
Sen Luan, Jinhu Hu, Mingliang Ma, Jiale Tian, Di Liu, Jianyi Wang, Jin Wang
Summary: Gas sensors are crucial in detecting harmful gases for social life and industrial production. Traditional MOS-based sensors suffer from limitations such as high operating temperature and slow response time, hindering their detection capabilities. Noble metal functionalization, particularly the use of Au NPs, offers a promising solution to enhance the performance of MOS gas sensors. This paper reviews recent research on Au-decorated MOS-based sensors and explores their sensing mechanism.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Junhao Ma, Wenhe Xie, Jichun Li, Haitao Yang, Limin Wu, Yidong Zou, Yonghui Deng
Summary: A strategy of site-selective modification using poly(ethylene oxide)-block-polystyrene (PEO-b-PS) micellar nanoreactors has been proposed to partially deposit transition metal oxides (e.g., FeOx) on metal nanoparticles (NPs) embedded in mesopores, leading to improved catalytic performance and functional properties of the carrier.
Article
Nanoscience & Nanotechnology
Luke A. M. Lyle, Tyson C. Back, Cynthia T. Bowers, Andrew J. Green, Kelson D. Chabak, Donald L. Dorsey, Eric R. Heller, Lisa M. Porter
Summary: Chemical and electrical measurements of Ti/(010) beta-Ga2O3 and Ti/(001) beta-Ga2O3 interfaces were conducted with XPS, J-V, and C-V measurements as a function of annealing temperature. The results show that the reactivity of Ti on the beta-Ga2O3 surface strongly affects the electrical performance and stability of Ti/beta-Ga2O3 ohmic contacts at elevated temperatures. The oxidized Ti amount increased with annealing temperature, and the Schottky barrier height had variations with temperature changes.
Article
Physics, Applied
Hongrong Hu, Alexander Scholz, Surya Abhishek Singaraju, Yushu Tang, Gabriel Cadilha Marques, Jasmin Aghassi-Hagmann
Summary: This study presents an inkjet-printed resistive switching device based on an Ag/ZnO/Au structure, exhibiting excellent performance and a stable conduction mechanism.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Daria I. Markina, Sergey S. Anoshkin, Mikhail A. Masharin, Soslan A. Khubezhov, Ivan Tzibizov, Dmitriy Dolgintsev, Ivan N. Terterov, Sergey V. Makarov, Anatoly P. Pushkarev
Summary: Detection of hazardous volatile organic and inorganic species, such as hydrogen halides (HX, X = Cl, Br, I), is crucial in ensuring human safety in the chemical industry. In this study, a cost-effective and highly sensitive detector was developed for optical detection of hydrogen chloride gas using solution-processed halide perovskite nanowire lasers. An anion exchange reaction between CsPbBr3 nanowires and vaporized HCl molecules led to the formation of a structure with a bromide core and a thin mixed-halide CsPb(Cl,Br)3 shell, which resulted in an increase in laser frequency. The optical response allowed for the detection of HCl molecules in the range of 5-500 ppm.
Article
Multidisciplinary Sciences
O. V. Skryabina, S. V. Bakurskiy, A. G. Shishkin, A. A. Klimenko, K. S. Napolskii, N. V. Klenov, I. I. Soloviev, V. V. Ryazanov, A. A. Golubov, D. Roditchev, M. Yu. Kupriyanov, V. S. Stolyarov
Summary: In this study, the influence of electron bath overheating on the critical current of bridge-like Josephson junctions built on a single Au-nanowire was measured. By utilizing the Usadel theory and a two-fluid description, the mutual influence of neighboring junctions and various electron gas overheating processes were revealed and explained. These results offer additional methods for controlling nanowire-based superconducting devices.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Hang Wang, Jiawei Yang, Anqi Wang, Ying Wang, Ning Han, Jun Yang, Yunfa Chen
Summary: In this study, single-crystalline Ga/Ga2O3 nanowires were successfully synthesized by chemical vapor deposition. The growth of the nanowires was found to be dependent on the size of the catalysts, with smaller Au and Pd catalysts favoring Ga/Ga2O3 nanowire growth. The Au and Pd catalysts were found to preferentially promote the growth of <110>- and <100>-oriented nanowires.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Engineering, Environmental
Md Shoriful Islam, Lakshya Mathur, Yeon Namgung, Bhupendra Singh, Jun -Young Park, Sun-Ju Song
Summary: Real-time monitoring and quantification of exhaust pollutants is crucial but difficult due to harsh conditions. In this study, BiVO4 nanoparticles are used to enhance the sensing performance in mixed-potential sensors. The results show that the nanoparticle decoration improves the microstructure and extends the triple phase boundary, resulting in higher sensitivity and faster response time. The fabricated sensor also exhibits good selectivity and stability.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Polymer Science
N. Senthil Kumar, J. H. Chang, Mon-Shu Ho, Babu Balraj, S. Chandrasekar, B. Mohanbabu, M. Gowtham, Donghui Guo, K. Mohanraj
Summary: The effects of Zn(2+) doping on the microstructural and morphological properties of V(2)O(5) nanorods were studied in this research. The XRD analysis confirmed the crystalline nature of both pure and Zn(2+) doped samples, with the latter showing mixed phases. Morphology analysis revealed that Zn(2+) substitution gradually transformed the shape of the nanorods from hexagonal face rods to a mixture of short rods and plate-like structures. Luminescence features of the nanostructures were analyzed using photoluminescence studies, and the parameters of V2O5/p-Si and ZnV2O5/p-Si photodiodes were investigated under different lighting conditions.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Physics, Applied
Yu-Li Chen, Babu Balraj, Pei-Fang Chung, Chandrasekar Sivakumar, Wen-Jay Lee, Mon-Shu Ho
Summary: Resistive Random Access Memories (ReRAMs) are promising candidates for nonvolatile memory due to resistive switching in high-k dielectric layers. Nonequilibrium molecular dynamics simulations with charge equilibration method were used to study electrochemical reactions of ReRAMs, showing that applying external electric field on grain boundaries is crucial for resistive switching. The study provides details of resistance switching mechanisms at atom length scale and picosecond timescale, suggesting useful aspects for future development of ReRAM technology.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Mohanbabu Bharathi, Babu Balraj, Chandrasekar Sivakumar, Zhiwei Wang, Jianwei Shuai, Mon-Shu Ho, Donghui Guo
Summary: Nanoscale non-volatile memory technology shows promise for in-memory computing and neuromorphic computing, but further understanding of charge transport and resistive switching mechanisms in memristor devices is needed. A study on MoO3 nanorods revealed improved device performance through analysis of resistive switching behavior and conductive mechanisms. Silver doping into the MoO3 structures showed enhanced bipolar resistive switching performance in the devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
B. Chakraborty, I Maity, P. Chung, M. Ho, P. Bhattacharyya
Summary: This paper reports the synthesis, characterizations, and highly selective methanol sensing performance of pristine electrodeposited MoS2 thin film, which was annealed at 550 degrees C to offer the most promising sensing performance. Density functional theory (DFT) based computations showed that MoS2 exhibited enormous potential in terms of adsorption energy and adsorption distance for methanol compared to its nearest interfering species, ethanol.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Chandrasekar Sivakumar, Gang-Han Tsai, Pei-Fang Chung, Babu Balraj, Yen-Fu Lin, Mon-Shu Ho
Summary: This study investigates resistance switching phenomena and proposed possible switching and electron conduction mechanisms in one-dimensional nanowires, with a focus on the underexplored application of low-dimensional beta-Ga2O3 nanowires in resistive memory technology. Structural characteristics were analyzed using SEM, TEM, and XRD techniques, while EDS, CL, and XPS analyses confirmed the composition of individual elements and the bonding characteristics essential for ReRAM performances. The study also discussed the forming-free bipolar resistance switching of a single beta-Ga2O3 nanowire ReRAM device and proposed a mechanism based on the formation and annihilation of conductive filaments through oxygen vacancies.
Article
Chemistry, Physical
Chandrasekar Sivakumar, Babu Balraj, Pei-Fang Chung, Mohanbabu Bharathi, Mohanraj Kumar, Senthil Kumar Nagarajan, Donghui Guo, Mon-Shu Ho
Summary: Novel NiO nanostructured materials were synthesized by hydrothermal method and used for fabricating high-performance ReRAM devices with superior switching and conducting filament formation attributed to oxygen vacancies. The study illustrates the mechanism of conductive filament construction and annihilation by oxygen ions and vacancies, providing insight into the potential applications of NiO nanostructures in next generation information storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Babu Balraj, Chandrasekar Sivakumar, Pei-Fang Chung, Mohanbabu Bharathi, Senthil Kumar Nagarajan, Mon-Shu Ho
Summary: This study synthesized two structurally distinct WO3 nanostructures, namely nanoplates and nanocubes, through hydrothermal method, characterized their properties effectively, and showed their performance differences in ReRAM devices.
Article
Chemistry, Multidisciplinary
Yu-Hsuan Lin, Chandrasekar Sivakumar, Babu Balraj, Gowtham Murugesan, Senthil Kumar Nagarajan, Mon-Shu Ho
Summary: The non-enzymatic glucose sensing response of pure and Ag-decorated vertically aligned ZnO nanorods grown on Si substrates was investigated. Ag@ZnO NR glucose sensor device exhibited a better sensing ability with excellent stability over time than pure ZnO NRs. The Ag@ZnO NR glucose sensor device recorded 2792 mu A/(mM center dot cm(2)) sensitivity with a lowest detection limit of 1.29 mu M.
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)
