Article
Chemistry, Analytical
Sungjin Kim, Deok-Hyun Cho, Hyeon-Kyung Chang, Ho-Nyun Lee, Hyun-Jong Kim, Tae Joo Park, Young Min Park
Summary: In this study, a controlled porous structure for photoactive gas sensors was fabricated using gas-flow thermal evaporation and atomic layer deposition method. By adjusting the pressure during thermal evaporation and depositing TiO2 layers on the surface of SnO2, selective response to specific gases was achieved. The experimental results showed that the nanoporous SnO2 exhibited high response rate and low detection limit, and the addition of TiO2 layer significantly improved the selective response to HCHO.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Qiumei Wang, Chenyu Wang, Xiao Chang, Xianghong Liu, Jun Zhang
Summary: By depositing Pd and Rh metals on porous In2O3 thin films using ALD technology, high and fast response to NO2 at room temperature was achieved. The Pd/Rh catalysts greatly improved the interaction and charge transfer between In2O3 and NO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Li-Wen Mao, Li-Yuan Zhu, Tao Tao Wu, Lei Xu, Xuan-Hong Jin, Hong-Liang Lu
Summary: This study synthesized heterostructured Nb2O5/SnO2 core-shell nanorods using a hydrothermal strategy and atomic layer deposition. The gas sensors based on these nanorods demonstrated improved sensing performance, stable operation, and low power consumption, making them promising for practical applications in oil and gas drilling platforms and other industrial fields.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yuxuan Wang, Chun Wang, Yanyan Xu, Yaqiu Sun
Summary: Novel Ag-doped ZnO/CdO ternary heterostructures (AZC composite) were fabricated and characterized, showing the generation of multiple heterojunctions and improved sensing performance compared to ZnO/CdO composite. The AZC sample with an Ag content of 3.04 wt% (AZC-2) exhibited a high response and ppb-level detection limit. This work highlights the promising use of Ag nanoparticles in enhancing the sensing property of transition metal oxide.
Article
Materials Science, Multidisciplinary
Preeti Kaushik, Marek Elias, Jan Prasek, Jan Michalicka, Lenka Zajickova
Summary: Multi-walled carbon nanotubes (MWCNTs) based heterostructures were prepared by oxygen plasma treatment and atomic layer deposition (ALD) of TiO2 on MWCNTs, resulting in different TiO2 structures on the nanotubes. The morphology of TiO2 and oxygen plasma treatment of the MWCNTs highly affected the NO2 sensing behavior of chemiresistive heterostructure sensors at room and elevated temperatures. The granular TiO2/MWCNTs heterostructure showed the highest response towards NO2 gas as compared to the island and continuous forms.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Guangzhou Geng, Wei Zhu, Ruhao Pan, Zhongshan Zhang, Changzhi Gu, Junjie Li
Summary: The atomic layer assembled nanofabrication based on soft-templates breaks through traditional limitations, providing scalability and powerful fabrication capability for generating complex multiple nanostructures.
Article
Engineering, Electrical & Electronic
Mohammed A. Alamri, Bo Liu, Michael Walsh, Jennifer L. Doolin, Cindy L. Berrie, Judy Z. Wu
Summary: UVC irradiation can effectively enhance H-2 gas response and response speed of Pt-NPs/SWCNTs/Gr sensors, with up to 4.3-fold increase in response and 3.6-fold increase in speed achieved at optimal conditions. This demonstrates the importance of carbon surface activation for high-performance H-2 sensors using carbon nanostructures.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Ehud Almog, Amit Sharma, Yuanshen Qi, Jonathan Zimmerman, Eugen Rabkin
Summary: Nanolattices, composed of nanometer-sized building blocks, have unique properties and are a rapidly growing class of metamaterials. This study fabricated a core-shell polymer-platinum nanolattice using various fabrication techniques. The thickness of the platinum coating significantly affected the strength and load-bearing capacity of the lattice.
Article
Engineering, Environmental
Chengming Lou, Hongyin Pan, Houshan Mei, Guocai Lu, Xianghong Liu, Jun Zhang
Summary: This study proposes an efficient strategy based on atomic layer deposition (ALD) to create low coordination atomic states in Co3O4/NiOx heterostructures, allowing for controllable regulation of oxygen vacancies and the electronic and band structure of the materials. The sensor device based on optimized Co3O4/NiOx sensing layer exhibits significantly enhanced performance for detecting triethylamine (TEA), including lower operating temperature, higher sensitivity, and lower limit of detection.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Viet Anh Cao, Minje Kim, Weiguang Hu, Sol Lee, Sukhyeong Youn, Jiwon Chang, Hyo Sik Chang, Junghyo Nah
Summary: This study reports the formation of SnS2/SnS heterostructure thin film using ALD to enhance the output performance of a PENG. The heterostructure significantly increased the piezoelectric response, resulting in improved output voltage and current density. Thickness-controllable large-area uniform thin-film deposition via ALD ensures reproducible output performance and adjustability of output density depending on applications.
Article
Materials Science, Ceramics
Chi-Chung Kei, Chih-Chieh Wang, Tsong-Pyng Perng
Summary: The study introduces a novel method to prepare an Al-doped ZnO nanotube oxygen sensor with tunable wall thickness, using tris(8-hydroxyquinoline) gallium nanowire as a template. The research shows that the gas response of the nanotubes is inversely proportional to wall thickness and is influenced by the Al2O3 content.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Jeanne Casetta, Celine Pochat-Bohatier, David Cornu, Mikhael Bechelany, Philippe Miele
Summary: By modifying the surface of polysulfone hollow fiber membranes using atomic layer deposition (ALD), coatings of titanium dioxide (TiO2), zinc oxide (ZnO), and alumina (Al2O3) can be applied to enhance the membrane's permeability and fouling resistance.
Article
Environmental Sciences
Sunil Babu Eadi, Han Yan, P. Senthil Kumar, Yuvakkumar Rathinam, Hi-Deok Lee
Summary: In this study, the performance of IGZO-decorated ZnO films for the detection of NO2 gas was investigated by changing the IGZO deposition time. The results showed that decorating ZnO with IGZO can significantly increase the sensor response.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Sungjin Kim, Hyeon-Kyung Chang, Kwang Bok Kim, Hyun-Jong Kim, Ho-Nyun Lee, Tae Joo Park, Young Min Park
Summary: Highly porous SnO2/TiO2 heterojunction films were prepared by introducing Ar gas during thermal evaporation to create porous SnO2, followed by ALD deposition of TiO2 layers. The heterostructure with TiO2 thickness of 50 cycles showed the highest photocatalytic efficiency due to the exposure of SnO2 on the surface, leading to efficient separation of photogenerated electrons and high production of reactive oxygen.
Article
Chemistry, Inorganic & Nuclear
Riya Alice B. John, A. Ruban Kumar
Summary: The present research synthesized pure Nickel Oxide (NiO) nanostructures with exceptional surface modification through temperature treatment. The prepared NiO was carefully tested for its morphology, structure, elements, and gas sensing abilities. The study revealed the sensing performances of various volatile organic compounds (VOCs), with a specific focus on formaldehyde (HCHO). Gas sensor testing of the prepared samples was carried out at room temperature (RT) and at different concentrations of the target gas. Among the different sensors tested, the NiO nanoparticles at 500 degrees C sintering temperature-based HCHO sensor showed the most significant response.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)