Article
Chemistry, Physical
Alexandra Apostoluk, Yao Zhu, Pierrick Gautier, Audrey Valette, Jean-Marie Bluet, Thibaut Cornier, Bruno Masenelli, Stephane Daniele
Summary: ZnO nanoparticles with a wide spectrum of visible emission are attracting more and more interest as a material for light sources and energy downshifting systems due to their intrinsic defects. However, achieving defect emission with a high luminescence quantum efficiency (PL QY) is difficult. In this study, we found that the nature of zinc precursors and alkaline hydroxide used in co-precipitation synthesis affects the emission spectra and PL QY of ZnO nanoparticles.
Article
Materials Science, Ceramics
M. Milanova, L. Aleksandrov, A. Yordanova, R. Iordanova, N. S. Tagiara, A. Herrmann, G. Gao, L. Wondraczek, E. I. Kamitsos
Summary: The structure and luminescence properties of glasses with compositions 50ZnO:40B2O3:10WO3:xEu2O3, 0 <= x <= 10 mol% were studied using infrared, Raman and photoluminescence spectroscopic techniques. The physical properties of the glasses were also determined. The results indicate the efficiency of the 50ZnO:40B2O3:10WO3 glass structure for the luminescence performance of doped Eu3+ and suggest that these glasses are potential materials for red emission.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Electrical & Electronic
Chen Li, Jiale Hou, Zijun Ye, Raz Muhammad, Aihua Li, Mingtao Ma, Guofa Wu, Kaixin Song, Tao Zhou, Minmin Mao, Bing Liu, Hadi Barzegar Bafrooei, Ehsan Taheri-nassaj, Shaojin Luo, Feng Shi, Shikuan Sun, Dawei Wang
Summary: In this study, MgxY3-xAl5-xSixO12 ceramics were prepared and the effects of crystal structure and microstructure on microwave dielectric properties were investigated. Liquid phase sintering induced by doping of Mg2+-Si4+ reduced the sintering temperature and time of YAG ceramics. The results established a structure-property relation for MgxY3-xAl5-xSixO12 ceramics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
H. A. Alburaih, Muhammad Aadil, Warda Hassan, Larissa Souza Amaral, Syeda Rabia Ejaz, Salma Aman, Ibrahim A. Alsafari
Summary: In this study, a multifunctional nanohybrid was synthesized and successfully used for crystal violet degradation and disinfection of S. aureus and E. coli under visible light irradiation. The nanohybrid exhibited enhanced photocatalytic and bactericidal activities compared to nanoparticles. The results suggested that the nanohybrid could improve charge separation and migration efficiency, leading to enhanced catalytic activity.
Article
Environmental Sciences
Sucheewan Krobthong, Tipawan Rungsawang, Sutthipoj Wongrerkdee
Summary: ZnO nanoparticles were synthesized using precipitation and combustion techniques. The precipitation method resulted in larger crystal sizes compared to the combustion method, while the particle sizes were similar. The functional analysis revealed surface defects in the ZnO structures. In the photocatalytic degradation of methylene blue, ZnO precipitation exhibited better degradation performance due to its larger crystal sizes, which facilitated carrier movement and reduced electron-hole recombination. The crystallinity of ZnO nanoparticles is thus an important factor in photocatalytic activity. Furthermore, precipitation is an interesting method for synthesizing ZnO nanoparticles with large crystal sizes.
Article
Chemistry, Physical
Meriem Haddad, Akila Belhadi, Loubna Boudjellal, Mohamed Trari
Summary: The study successfully synthesized the heterojunction CuO/ZnO using co-precipitation method and evaluated its photoactivity using various analytical techniques. The results showed that CuO/ZnO can produce hydrogen under visible light, with the highest catalytic efficiency of 5% CuO/ZnO at pH 7 in solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
H. V. S. Pessoni, A. Franco Jr
Summary: The influence of structural defects on the magnetic properties of Co-doped ZnO polycrystalline ceramics was investigated, and it was found that with increasing Co concentration, the saturation magnetization decreased and changed to antiferromagnetic and paramagnetic ordering. Additionally, the high-temperature sintering process resulted in the increase of antiferromagnetic ordering due to the homogenous dilution of Co ions in the ZnO structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
A. Krishnanunni, Akshayakumar Kompa, Dhananjaya Kekuda, M. S. Murari, K. Mohan Rao
Summary: This study investigates the impact of defects on the magnetic behavior of ZnO based samples, specifically Co-Sm co-doped ZnO nano powder. The results show that the prepared samples exhibit wurtzite phase with enhanced defects on doping and co-doping. The presence of defects in the samples enhances their magnetic behavior.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Letter
Chemistry, Multidisciplinary
Jia-Min Lai, Muhammad Umair Farooq, Yu-Jia Sun, Ping-Heng Tan, Jun Zhang
Summary: The multiphonon process is crucial for understanding the electron-phonon coupling in solids, which affects their optical and transport properties. This study investigates the characteristics of high-order Raman scattering and hot luminescence in Mn-doped ZnO nanowires to shed light on the multiphonon-involved decay process of excited states, providing insights for further studies on the statistical characteristics of excited state decay.
Article
Materials Science, Multidisciplinary
Alexander M. Antipin, Elena A. Volkova, Victor A. Rassulov, Nikolay N. Kuzmin, Elena Yu. Borovikova, Elena Latanova, Elizaveta V. Koporulina
Summary: New nonstoichiometric SmAl-dimetaborate crystals were synthesized using spontaneous nucleation from Sm2O3 - B2O3 - K2Mo3O10 flux melt. The crystals were characterized through single-crystal XRD, scanning electron microscopy, luminescence spectroscopy, and Raman measurements, providing comprehensive information about their structure and properties.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Miao Wang, Yingying Guo, Zhiqin Zhu, Quan Liu, Tongming Sun, Huihui Cui, Yanfeng Tang
Summary: A facile solvothermal approach was developed with the assistance of DEA to prepare ZnO with tunable morphologies, and the photocatalytic activities of different morphologies were evaluated. The results showed that the volume ratio of DEA/H2O had a significant influence on the morphology of ZnO products, and ZnO polyprisms exhibited enhanced photocatalytic efficiency.
Article
Materials Science, Ceramics
Ayesha Ahmed Sumra, Muhammad Aadil, Syeda Rabia Ejaz, Saima Anjum, Tahira Saleem, Maryam Zain, Ibrahim A. Alsafari
Summary: In this study, a two-dimensional nanoarchitecture of ZnO was successfully fabricated by reducing zinc nitrate precursor using plant extract. The synthesized ZnO sample was characterized using various techniques, and its photocatalytic and antibacterial properties were evaluated. The results demonstrated that the ZnO nanoarchitecture exhibited excellent photo-mineralization and antibacterial characteristics.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Liu Yang, Yingxue Wu, Hongyi Shu, Chuang Wang, Changetong Song, Xianhong Zhang, Dong Chen, Yuhong Ma, Wantai Yang
Summary: Polymer-supported catalysts have been the focus of extensive research due to their easy handling, facile separation, and excellent recycling performance. In this study, a simple and efficient strategy was developed to fabricate isocyanate-functionalized polymer microspheres that can serve as a versatile support for photocatalyst immobilization. The resulting supported TiO2 nanoparticles exhibited higher photocatalytic performance, facile separation, and better reusability compared to pristine TiO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Baskaran Palanivel, Romulo R. Macadangdang Jr, Md Shahadat Hossain, Fahad A. Alharthi, Mohanraj Kumar, Jih-Hsing Chang, Sreedevi Gedi
Summary: In this work, a Gd/La@ZnO nanoflower photocatalyst was successfully synthesized via co-precipitation method and used for the degradation of rhodamine B and tetracycline under direct sunlight irradiation. The introduction of rare earth elements extended the optical absorption wavelength of ZnO from the UV region to the visible-light region. The co-doped ZnO nanoflower showed excellent degradation efficiency and a lower charge recombination efficiency compared to pure ZnO.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Inorganic & Nuclear
Aziz Alaoui Tahiri, Brahim El Bali, Mohammed Lachkar, Claire Wilson, David Bauer, Christoph Haisch
Summary: This study presents the synthesis and characterization of a new organically templated dihydrogen-pyrophosphate compound, including crystal structure determination, Raman and FTIR spectroscopy analysis, as well as UV-Vis spectrophotometry results.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Optics
R. Raji, R. G. Abhilash Kumar, K. G. Gopchandran
JOURNAL OF LUMINESCENCE
(2019)
Article
Nanoscience & Nanotechnology
G. Dhanu Krishna, V. P. Mahadevan Pillai, K. G. Gopchandran
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2020)
Article
Materials Science, Multidisciplinary
V. S. Kavitha, S. R. Chalana, R. Reshmi Krishnan, K. G. Gopchandran, V. P. Mahadevan Pillai
Article
Chemistry, Inorganic & Nuclear
Sajesh Sasidharan, G. Jyothi, S. Sameera, K. G. Gopchandran
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Engineering, Electrical & Electronic
G. Dhanu Krishna, V. P. Mahadevan Pillai, K. G. Gopchandran
OPTICAL FIBER TECHNOLOGY
(2020)
Article
Chemistry, Physical
Nithin Jayan Suraja, Ambazhathil Mahesh, Kaithakkal Solaman Sibi, Subodh Ganesanpotti
Summary: This work reports the crystal structure and multifunctional optical properties of A-site substituted double perovskite compounds in A(2)CdTeO(6) (A=Ba, Sr, Ca) system, synthesized through high-temperature solid-state reaction. The observed number of vibrational modes is used to investigate the crystal structure and the compounds are confirmed to belong to cubic, tetragonal, and monoclinic symmetries. The optical band gaps of Ba2CdTeO6, Sr2CdTeO6, and Ca2CdTeO6 are calculated, indicating their potential as host lattices for novel phosphor materials. Photoluminescence studies show intense red emission from Eu3+ substituted Sr2CdTeO6, with potential applications in temperature sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Spectroscopy
Sunil Thomas, Rani George, Naser Qamhieh, K. G. Gopchandran, Saleh T. Mahmoud, Alessia Quatela
Summary: This study synthesized a Sr1.0Ba2.0B6O12:O.5Sm(3+) phosphor using the solid-state reaction method, and explored its spectroscopic properties including morphology, elemental composition, phase changes, crystallite phases, molecular vibrations, energy bandgap, bonding nature, and radiative properties. The phosphor emits cool-white light with high spectroscopic quality factor, stimulated-emission cross-section, quantum efficiency, and white-light emission, making it useful for display and lighting applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
C. R. Rekha, S. G. Jiji, V. U. Nayar, K. G. Gopchandran
Summary: Hexagonal hollow Au-Ag nanostructures were synthesized using galvanic replacement mechanism with silver nanoparticles as sacrificial templates. The cavity dimension in the hollow structures was found to be dependent on the amount of HAuCl4 used, and the optimal Ag: Au ratio was determined. The SERS activity of these hollow nanostructures was investigated using PCA, revealing them as reliable substrates for multiplexed SERS detection.
VIBRATIONAL SPECTROSCOPY
(2021)
Article
Optics
Sajesh Sasidharan, G. Jyothi, K. G. Gopchandran
Summary: Perovskite titanate nanophosphors, Ca1-x-yYxTiO3:yEu3+, have been successfully synthesized through solution combustion synthesis, achieving a tenfold increase in luminescence intensity and high color purity and long luminescence lifetime. X-ray Photoelectron Spectroscopy studies confirmed the 3+ oxidation state of yttrium and europium ions, as well as their occupancy at Ca2+ sites. The presence of Raman modes and TEM analysis also revealed the high crystallinity of the phosphors.
JOURNAL OF LUMINESCENCE
(2021)
Article
Engineering, Electrical & Electronic
P. Sajith Sethu, K. G. Gopchandran, Sam Solomon
Summary: The study proposes an optical system based on non-binary quasi-cyclic LDPC codes with a chi-square channel model to achieve large coding gains with smaller codeword lengths. Non-binary LDPC codes offer better error performance compared to their binary versions, while the quasi-cyclic property helps reduce encoding complexity.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ramachandrapanicker Devi Chandra, Lalan Veena, Kunnel Gopalan Gopchandran
Summary: Cobalt (Co)-doped ZnO nanoparticles were synthesized at 100°C using a simple chemical technique, resulting in nanoparticles with high crystallinity and reduced defect density. Co-doping suppressed oxygen-vacancy-related defects at lower doping densities, but increased defect density at higher doping densities. Co-doping was found to significantly suppress defects in ZnO for electronic and optoelectronic applications, as demonstrated by XPS, PL, electrical conductivity, and Mott-Schottky analysis. Photodetectors fabricated with Co-doped ZnO nanoparticles showed faster response time due to the reduced defect density.
INORGANIC CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Veena Lalan, V. P. Mahadevan Pillai, K. G. Gopchandran
Summary: The synthesis of a new ternary nanocomposite, Ag-CaTiO3@rGO, with high photocatalytic dye degradation efficiency is reported. The high degradation efficiency of this photocatalyst is attributed to the synergistic effect of plasmon-induced visible light-harvesting due to Ag and enhanced adsorption and electron-transport properties due to rGO.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Ramachandrapanicker Devi Chandra, Kunnel Gopalan Gopchandran
Summary: Wurtzite ZnO nanoparticles were synthesized via a one-step process at temperatures ranging from 30-100 degrees C, resulting in highly crystalline particles with low oxygen vacancies that cause green emission. Various analyses such as XRD, HRTEM, photoluminescence, and XPS confirmed the characteristics of the nanoparticles. Optical absorption spectroscopy was used to estimate the band gap, and photodetectors made from the nanoparticles exhibited a clear response to UV light, making them promising candidates for linear optical synaptic devices.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
G. Jyothi, K. G. Gopchandran
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Viji Vidyadharan, S. Sameera, K. G. Gopchandran
MATERIALS TODAY-PROCEEDINGS
(2020)
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)
