Article
Materials Science, Coatings & Films
Ippei Tanaka, Hiroshi Okubo, Yasunori Harada
Summary: The study investigates the synthesis of diamonds on three-dimensional metal surfaces using MVP deposition, focusing on how pressure and bias voltage influence the diamond structure. The results show that MVP makes it possible to deposit diamond on 3D shape substrates, with diamond particles created at specific bias voltages and methane concentrations.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Octavian-Gabriel Simionescu, Oana Brincoveanu, Cosmin Romanitan, Silviu Vulpe, Andrei Avram
Summary: In this study, the growth process of self-sustained vertically aligned carbon nanotubes (VA-CNTs) is comprehensively investigated. The deposition of supporting and catalyst layers, as well as the CNT growth, are analyzed using different techniques, such as X-ray diffraction, X-ray reflectivity, and scanning electron microscopy. The crystalline structure, density, thickness, roughness, and morphology of different layers, including the titanium nitride supporting layer, nickel layers, and CNTs, are studied.
Article
Chemistry, Inorganic & Nuclear
Yifei Ma, Jiemin Han, Dewu Yue, Zhaomin Tong, Mei Wang, Liantuan Xiao, Suotang Jia, Xuyuan Chen
Summary: The morphology control of vertically oriented graphene (VG) is crucial for its application performance. In this study, a continuous morphology variation of VG is achieved by adjusting the growth positions, ranging from porous to wall-like structures, leading to changes in hydrophobicity and thermal emissivity. The relationship between plasma and VG morphology is investigated, and the role of radicals in the growth process is identified.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yan Wang, Yuanxing Fang, Yankun Wang, Haisu Wu, Masakazu Anpo, Jimmy C. Yu, Xinchen Wang
Summary: This study describes the synthesis of nitrogen-doped carbon (NDC) photocatalyst directly from ammonia and methane gases. The photocatalyst can selectively synthesize imines by photo-oxidation of amines, producing H2O2 simultaneously in the photoreduction reaction. These findings shed light on the chemical evolution of the Earth.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Di Yang, Li Guo, Bisheng Wang, Shuai Jin, Jiaqi Zhu, Ming Zhai
Summary: This paper studied the characteristics of hydrogen plasma in microwave plasma chemical vapor deposition chambers at different conditions. A multiphysics coupling model was established to calculate the effects of deposition pressure and microwave input power on the main characteristics of hydrogen plasma. The research found that different characteristic quantities have differing sensitivities to process parameters, and the volume of the plasma ball increases with increasing microwave power and shrinks with increasing deposition pressure.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Kallol Chakrabarty, Paul A. Baker, Vineeth M. Vijayan, Shane A. Catledge
Summary: Boron nitride is a synthetically produced advanced ceramic material that can exist in various polymorphic forms, similar to carbon. The deposition of metastable wurtzite boron nitride through microwave plasma chemical vapor deposition is facilitated by applying a negative DC bias to the substrate, resulting in a higher content of sp(3) bonded BN. This is confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy, with nano-indentation measurements showing an average coating hardness of 25 GPa.
Article
Chemistry, Physical
Ben McLean, Izaac Mitchell, Feng Ding
Summary: This study reveals the mechanism of single-walled carbon nanotube (SWCNT) growth in alcohol chemical vapor deposition (ACVD) through density functional tight binding molecular dynamics simulations. The results demonstrate that the catalyst composition can be controlled by reaction pathways mediated by hydroxyl OH radicals, leading to promotion of SWCNT growth.
Review
Engineering, Chemical
Gerhard Franz
Summary: Chemical Vapor Deposition (CVD) is a powerful tool for surface refinement, with its plasma-enhanced variation having equal strength. Different types of plasma methods have their own advantages and disadvantages, while surface analysis of deposited layers is crucial for assessing purity and quality of coatings.
Article
Biochemistry & Molecular Biology
Yotsarayuth Seekaew, Nantikan Tammanoon, Adisorn Tuantranont, Tanom Lomas, Anurat Wisitsoraat, Chatchawal Wongchoosuk
Summary: In this study, carbon dioxide gas was converted into graphene on copper foil using a thermal chemical vapor deposition method with hydrogen plasma pre-treatment. The number of graphene layers can be controlled by adjusting the pre-treatment power, and high-quality bilayer and few-layer graphene have been successfully synthesized.
Article
Chemistry, Physical
Erika Rajackaite, Domantas Peckus, Rimantas Gudaitis, Tomas Tamulevicius, Sarunas Meskinis, Sigitas Tamulevicius
Summary: This study investigated the growth of vertical graphene nanosheets (VGN) with various heights and densities on fused silica substrates using microwave plasma-enhanced chemical vapor deposition technique. The research focused on the evolution of VGN properties with different growth durations and found a correlation between TAS results and the defectiveness and disorder of VGN layers. Optimal growth conditions were determined with increasing deposition duration, ensuring high-quality graphene deposition. Further increase in deposition time resulted in the formation of different carbon allotropes.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Emily Schifano, Gianluca Cavoto, Francesco Pandolfi, Giorgio Pettinari, Alice Apponi, Alessandro Ruocco, Daniela Uccelletti, Ilaria Rago
Summary: The emergence of multidrug-resistant bacteria is a growing threat to public health, necessitating the development of non-antibiotic antibacterial approaches. In this study, vertically aligned carbon nanotubes (VA-CNTs) with controlled nanomorphology were proposed as effective platforms for bacteria eradication. Through a combination of microscopic and spectroscopic techniques, the topography of VA-CNTs was tailored in a controlled and time-efficient manner using plasma etching processes. The highest reduction in cell viability was observed for VA-CNTs modified using plasma etching with Ar and O-2, indicating their potential as a surface for inactivating both planktonic and biofilm infections.
Article
Nanoscience & Nanotechnology
Swapnil Ghodke, Motoyuki Murashima, Dennis Christy, Ngo Van Nong, Kenji Ishikawa, Osamu Oda, Noritsugu Umehara, Masaru Hori
Summary: The mechanical properties, including compressive strength and modulus, of the maze-like CNW structure synthesized by RI-PECVD technique were analyzed using nanoindentation method, revealing an elastoplastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Zewen Sun, Lei Huang, Yoshimine Kato, Kungen Teii
Summary: Electrical contacts to carbon nanowalls (CNWs) were studied with Ag, Au, and Mg as contact materials in a temperature range of 25°C to 300°C. The contact resistance and specific contact resistivity decreased with increasing temperature, with low thermal activation energies. The contact resistance dominated the current transport between the metal electrodes and had little dependence on the work function of the metal species, attributed to the semi-metallic feature of CNWs.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Review
Energy & Fuels
Surjit Sahoo, Gopinath Sahoo, Sang Mun Jeong, Chandra Sekhar Rout
Summary: Vertical graphene (VG) has gained attention as an electrode material for supercapacitors due to its unique properties. Progress has been made in growth and application of VG, but there are still many recent developments to be reviewed. By controlling the growth direction of graphene, its electronic band structure and bandgap can be controlled. VG exhibits superior performance in electrolyte and electron transport, making it a promising material for future energy storage devices. This review summarizes the importance of VG structure, growth methods, and strategies to enhance energy storage performance.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Materials Science, Multidisciplinary
Yanjing Liu, Jiawei He, Nan Zhang, Wencong Zhang, Yanping Zhou, Kama Huang
Summary: The review provides a comprehensive overview of the application of Microwave plasma chemical vapor deposition (MPCVD) in the fabrication of carbon nanotubes (CNTs), covering device summary, treatment methods, influencing factors, and listing product parameters and synthesis conditions.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Regaty Anitha Reddy, Kattepogu Rama Rao, Bitra Rajesh Babu, Guthikonda Kiran Kumar, Cherukupalli Rajesh, Anindita Chatterjee, Nadella Krishna Jyothi
Summary: This study systematically investigates the influence of Nd3+ substitution on the structural, magnetic, and electrical properties of cobalt ferrite. The experimental results show that Nd3+ substitution significantly affects the grain size, magnetic properties, and electrical resistivity of cobalt ferrite.
Article
Chemistry, Organic
Puli Venkat Swamy, Vukoti Kiran Kumar, Ruddarraju Radhakrishnam Raju, Regalla Venkata Reddy, Anindita Chatterjee, Gangarapu Kiran, Gattu Sridhar
SYNTHETIC COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Anil Pommidi, Asha Begum Shaik, Anindita Chatterjee, Vijaya Laxmi Somarapu
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2020)
Article
Physics, Applied
Seiya Suzuki, K. Kanishka H. De Silva, Masamichi Yoshimura, Tomonobu Nakayama
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Electrochemistry
Shuhei Ogawa, Masanori Hara, Seiya Suzuki, Prerna Joshi, Masamichi Yoshimura
Article
Chemistry, Physical
Venkat Swamy Puli, Mahesh Subburu, Yadagiri Bhongiri, Anuj Tripathi, K. R. S. Prasad, Anindita Chatterjee, Someshwar Pola, Prabhakar Chetti
Summary: This study reports the synthesis of new indolo[3,2-b]indoles in the presence of Ag-doped ZnO and (Diacetoxyiodo) benzene system under visible-light, thoroughly characterized by various spectroscopic methods. The photophysical properties, thermal stability, and frontier molecular orbitals of the compounds were investigated, and their performance as organic thin-film transistors was evaluated with promising results. The study demonstrates the potential applications of these compounds in organic electronic devices.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
K. Kanishka H. De Silva, Pamarti Viswanath, V. Kesava Rao, Seiya Suzuki, Masamichi Yoshimura
Summary: A new insight into the characterization of GO and thermally reduced GO monolayer flakes deposited on different commonly used Si-based substrates by Raman spectroscopy along with optical visualization has been reported. The study found that dielectric substrates with lower reflectance in the visible range provide better optical contrast and generate intense Raman signals under normal white light illumination. Additionally, a Si substrate with a 90 nm SiO2 layer was shown to offer the highest I-G'/I-G ratio and better optical visibility for monolayer RGO flakes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Organic
Venkat Swamy Puli, Suresh Kilaru, Yadagiri Bhongiri, Sreenath Reddy Marri, Anuj Tripathi, Prabhakar Chetti, Anindita Chatterjee, Kiran Kumar Vukoti, Someshwar Pola
Summary: A series of symmetrical fused heterocyclic aromatic hydrocarbons (HAHs) with an indolo[1,2-c]quinazoline (IQ) core moiety were synthesized and characterized in this study. The new HAHs IQ series were systematically investigated using spectroscopic methods, supported by density functional theory (DFT) and time-dependent density functional theory (TDDFT) studies. One compound, tetramethyl-substituted indolo[1,2-c]quinazoline (TMIQ), exhibited shifted pi-pi stacking interactions, making it a new semiconducting material with efficient charge transport behavior as confirmed by single-crystal field-effect transistor devices.
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY
(2021)
Article
Physics, Applied
Vasilios Karanikolas, Seiya Suzuki, Shisheng Li, Takuya Iwasaki
Summary: This Perspective presents the application of polariton modes in two-dimensional materials to enhance and control light-matter interactions at the nanoscale. By analyzing the optical response of various 2D material nanostructures, the hybrid light-matter modes are evaluated.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Anindita Chatterjee, Gourav Mondal, Kiran Kumar Guthikonda, Abhijit Saha
Summary: A green aqueous-based route was used to prepare ZnSe quantum dots with doping of transition metals in the presence of thiol mercaptopropionic acid as a growth moderator. Characterization using various techniques confirmed the structure and morphology of the synthesized ZnSe quantum dots, as well as the enhancement from transition metal doping.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Anindita Chatterjee, A. V. Ravindra, G. Kiran Kumar, Ch. Rajesh
Summary: Pure ZnO and CuO nanoparticles and their nanocomposites were successfully synthesized using co-precipitation method. The nanocomposites showed potential in improving light efficiency at low concentrations.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Anindita Chatterjee, Garbham Venkata Sivaprasad, Ravi Kumar Devarakonda, Ramachandrula Krishna Kumar, Bavireddi Basaveswara Rao, Gajjala Krishna Reddy, Ramayanam Satya Kameswara Sharma
Summary: A new synthetic approach was proposed in this study to reduce nitro aromatic compounds to amines using sodium dithionite without the use of metal catalysts. Various nitro compounds with reducible functional groups were selectively reduced with good to excellent yields. Some of the products underwent instantaneous chemical degradation and were characterized using spectral methods.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Seiya Suzuki, Yoshihiro Nemoto, Natsumi Shiiki, Yoshiko Nakayama, Masaki Takeguchi
Summary: Germanene, a two-dimensional germanium material similar to graphene, has unique topological properties that make it a promising candidate for next-generation electronics. However, the lack of chemical stability in germanene has hindered the development of germanene electronic devices. In this study, the behavior of germanium at high temperatures was observed using transmission electron microscopy (TEM) on a graphene/germanium/graphene encapsulated structure. The results demonstrated that Germanium can exist as a liquid phase between graphene layers at temperatures above its melting point, and that it can incorporate surrounding amorphous germanium to grow larger crystals. These findings provide important insights for the growth of germanene at solid interfaces.
ANNALEN DER PHYSIK
(2023)
Article
Chemistry, Multidisciplinary
Seiya Suzuki, Takuya Iwasaki, K. Kanishka H. De Silva, Shigeru Suehara, Kenji Watanabe, Takashi Taniguchi, Satoshi Moriyama, Masamichi Yoshimura, Takashi Aizawa, Tomonobu Nakayama
Summary: Germanene, a 2D honeycomb germanium crystal, is grown at graphene/Ag(111) and hexagonal boron nitride (h-BN)/Ag(111) interfaces by segregating germanium atoms. A simple annealing process in N-2 or H-2/Ar at ambient pressure leads to the formation of germanene, indicating that an ultrahigh-vacuum condition is not necessary. The grown germanene is stable in air and uniform over the entire area covered with a van der Waals (vdW) material.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Organic
Venu Kandula, Sravan K. Bandaru, C. Balakrishna, Anindita Chatterjee, Satyanarayana Yennam, Graham C. Saunders, Manoranjan Behera
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2020)
