Article
Chemistry, Multidisciplinary
Qingda Liu, Xun Wang
Summary: The self-assembly of clusters provides a feasible approach for the bottom-up fabrication of functional materials with tailored properties. This paper introduces recent progress on cluster-based assemblies, including noble metal and polyoxometalate (POM) clusters, and discusses their structures, formation mechanism, and properties from experimental and theoretical aspects. The research aims to provide new insights into the design and manufacture of sub-nanometer materials based on clusters.
Article
Chemistry, Physical
Pierre Tomasini
Summary: The silicon chemical vapor deposition process via silane is determined using classical thermodynamics, showing that a linear function of temperature controls silicon growth rates and neatly maps the response of growth rate activation energy, providing clarity to the parameter space. The study demonstrates the portability of the linear function of temperature across reactors and extracts reactor scaling factors, reducing the complex silicon deposition process to its essentials through thermodynamics.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Seon Namgung, Steven J. Koester, Sang-Hyun Oh
Summary: This study demonstrates an ultraflat nanogap platform based on atomic layer deposition for fabricating 2D material-based optical and electronic devices. Short-channel field-effect transistors based on black phosphorus and MoS2, as well as photodetectors with a nanoscale photosensitive channel, were successfully fabricated on this platform, showing higher photosensitivity compared to microscale gap channels.
Article
Materials Science, Coatings & Films
Jan-Willem J. Clerix, Golnaz Dianat, Annelies Delabie, Gregory N. Parsons
Summary: This study investigates the adsorption of DMATMS on SiO2 and the subsequent reactions during TiCl4/H2O ALD. It is found that DMATMS selectively reacts with -OH groups on SiO2 and inhibits the reaction with TiCl4. Additionally, DMATMS can also react with residual -OH groups and reduce nucleation. The effectiveness of DMATMS passivation on SiO2 and H-terminated Si is quantified using Rutherford backscattering spectrometry.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Chemistry, Physical
Petros Abi Younes, Evgeniy Skopin, Medet Zhukush, Laetitia Rapenne, Herve Roussel, Nicolas Aubert, Lhoussain Khrouz, Christophe Licitra, Clement Camp, Marie-Ingrid Richard, Nathanaelle Schneider, Gianluca Ciatto, Nicolas Gauthier, Denis Rouchon, Elsje Alessandra Quadrelli, Hubert Renevier
Summary: In this study, a 2D titanium disulfide (TiS2) film was successfully grown on a SiO2/Si substrate using atomic layer deposition/molecular layer deposition (ALD/MLD) method. The research found that by controlling the annealing conditions, lamellar TiS2 layers parallel to the substrate can be obtained, and their properties were characterized by various techniques. Experimental results showed that the thin films grown on SiO2/Si substrates behaved as heavily doped semiconductors.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Nilabh Dish, Rakesh Behera, A. Satyaprasad, Abhay Gautam
Summary: This study successfully grows epitaxial Ag, Au, and Cu films on NaCl crystals using a simple approach, and shows a considerable tolerance towards surface misorientation.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kevin Ament, Nicolas Koewitsch, Dianwei Hou, Thomas Goetsch, Jutta Kroehnert, Christopher J. Heard, Annette Trunschke, Thomas Lunkenbein, Marc Armbruester, Josef Breu
Summary: This study demonstrates the fabrication of a new catalyst structure using liquid crystalline phases of fluorohectorite nanosheets, which performed better in oxidation reactions compared to traditional catalysts. By effectively trapping Pd nanoparticles in the gaps between nanosheets, the structure improved catalytic performance by preventing CO poisoning.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Maritza Mujica, Amar Mohabir, Pralav P. Shetty, Wesley R. Cline, Daniel Aziz, Matthew T. McDowell, Victor Breedveld, Sven Holger Behrens, Michael A. Filler
Summary: In this study, we demonstrate the growth of single-crystalline i-Si, i-Si/n-Si, and SixGe1-x/SiyGe1-y nanowires via the Geode process. The use of microcapsules improves scalability while maintaining programmability of the nanowires. Heat and mass transport limitations introduced by the microcapsule wall are shown to be negligible, allowing for consistent compositional control. The efficient transport also minimizes structural variations in nanowires grown in microcapsules with different sizes and wall thicknesses.
Article
Chemistry, Analytical
Yunyoung Choi, Younseong Song, Younghak Cho, Kyung-Hak Choi, Chulmin Park, Dong-Gun Lee, Raeseok Lee, Nakwon Choi, Ji Yoon Kang, Sung Gap Im, Hyejeong Seong
Summary: This article introduces a PCR tube based on surface-modified polymer poly-(2-dimethylaminomethylstyrene) (pDMAMS) for diagnosing COVID-19. The tube achieves nearly 100% RNA capture efficiency within 25 minutes, and the captured RNA is detected by chamber digital PCR, enabling sensitive, accurate, and rapid diagnosis.
ANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Jimmy Melskens, Roel J. Theeuwes, Lachlan E. Black, Willem-Jan H. Berghuis, Bart Macco, Paula C. P. Bronsveld, W. M. M. Kessels
Summary: A fast pulsed-flow PECVD process for POx layer deposition has been introduced, maintaining high-quality POx/Al2O3 surface passivation. It is suitable for n-type silicon solar cells, providing excellent surface passivation with high positive fixed charge density and ultralow interface defect density.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Fan Liu, Naoto Nishioka, Fumio Ogawa, Toshiyuki Hashida
Summary: This study discusses the growth mechanism of epitaxial PyC layers on CNT surfaces achieved by low-pressure ethylene pyrolysis, distinct from previous studies using higher gas pressures. The average thickness of deposited PyC layers is calculated by analyzing TEM images, and the crystallinity is evaluated by Raman spectroscopy and X-ray diffraction. A two-stage nonlinear behavior in the growth kinetics of PyC layers is found, indicating the influence of surface active sites on the radial growth rate.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Rui-Pu Wang, Chun-Rui Hu, Yu Han, Ben Yang, Gong Chen, Yang Zhang, Yao Zhang, Zhen-Chao Dong
Summary: The investigation of molecular adsorption structures on nonmetallic surfaces is important. In this study, the TERS signal from a single molecule on a nonmetallic surface was successfully detected, and the spatial resolution was found to be comparable to that on metallic substrates. This offers promise for applying subnanometer resolved TERS to various systems involving nonmetallic substrates.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Chang Yu, Yue Du, Ruhan He, Yao Ma, Zhenhui Liu, Xinyuan Li, Wen Luo, Liang Zhou, Liqiang Mai
Summary: A SiOx/C@SGC lithium host material with excellent Coulombic efficiency and stability has been successfully prepared through the design of a three-dimensional host. The synergistic effect of the lithiophilic inner shell and highly conductive SGC coating layer effectively controls the growth of lithium.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Anand B. Puthirath, Eliezer F. Oliveira, Guanhui Gao, Nithya Chakingal, Harikishan Kannan, Chenxi Li, Xiang Zhang, Abhijit Biswas, Mahesh R. Neupane, Bradford B. Pate, Dmitry A. Ruzmetov, A. Glen Birdwell, Tony G. Ivanov, Douglas S. Galvao, Robert Vajtai, Pulickel M. Ajayan
Summary: The study found that Hummer's method is very effective in oxidizing pristine diamond surfaces, especially in the presence of strong oxidizing agents. Microcrystalline diamond powder is more prone to oxidation to polycrystalline diamond wafers.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Kazuki Uchiyama, Takashi Yamamoto, Yasuaki Einaga
Summary: Silicon carbide (SiC) has excellent properties but lacks sufficient electrical conductivity for electrochemical applications, leading to the exploration of boron-doped SiC (SiC:B). The electrochemical properties of SiC:B were evaluated and found to have reactivity and sensitivity comparable to that of glassy carbon electrodes.