Article
Engineering, Electrical & Electronic
Vinit Kumar Yadav, Amitabha Nath, Abhijit Das, Julaiba Tahsina Mazumder, Mitra Barun Sarkar
Summary: Enhanced photosensing performance was reported for Indium nanoparticles capped TiO2 nanowire array using GLAD technique, showing high ideality factor and improved photoresponsivity. The ON/OFF switching irradiation for the In NPs based photosensor increased with quick rise and fall times.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Laishram Thoibileima Chanu, Naorem Khelchand Singh
Summary: This study successfully presents the growth of NiO nanowire on Si substrate using the GLAD technique, and various analysis methods confirm its excellent performance characteristics, such as well-aligned growth, stable crystal structure, and larger bandgap. The fabricated device exhibits high responsivity, detectivity, and photosensitivity, along with rectifying behavior and low noise equivalent power. Furthermore, the device shows fast response time and a large linear dynamic range, making it a promising candidate for photodetector applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Zhongwei Wu, Peng Li, Jie Zhao, Ting Xiao, Hong Hu, Peng Sun, Zehan Wu, Jianhua Hao, Chunlin Sun, Haoli Zhang, Zhifeng Huang, Zijian Zheng
Summary: In this study, TiO2 nanopillar arrays were directly deposited on flexible substrates using glancing angle deposition at low substrate temperature, improving the performance and stability of flexible PSCs.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Engineering, Environmental
Shaeel Ahmed Althabaiti, Zaheer Khan, Salem Mohamed Bawaked, Soad Zahir Al-Sheheri, Mohamed Mokhtar, Maqsood Ahmad Malik, Katabathini Narasimharao
Summary: TiO2 nanotubes, Fe3O4-ZnO, and nanocomposites of Fe3O4-ZnO and TiO2 were synthesized by varying the amount of Fe3O4-ZnO. PtOx nanoparticles were then decorated onto the surface of the nanocomposites using a green synthesis method. The synthesized samples were characterized through various spectroscopy and microscopy techniques, revealing strong interaction between Fe3O4-ZnO and TiO2 nanotubes. Deposition of PtOx resulted in a decrease in the bandgap, and Fe3O4-ZnO/TiO2 nanocomposites exhibited higher surface area and pore volume compared to Fe3O4-ZnO sample. The presence of PtOx species inhibited the recombination of e-/h+ pairs, leading to improved photocatalytic H2 production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Mengsheng Yang, Kewei Gao, Pifeng Xing, Taimin Yi, Zhibing He, Bo Ke
Summary: Gold nanoarray films prepared by glancing angle deposition exhibit different thermal stabilities and degradation mechanisms based on their structural features at different temperatures.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ting Xiao, Jie Zhao, Peng Sun, Peng Li, Yaokang Zhang, Ni Zhao, Zhiwei Ren, Gang Li, Zhifeng Huang, Zijian Zheng
Summary: The study introduces a new type of broadband-transmitting built-in TiO2 metalens that can enhance the sensitivity, speed, and efficiency of photodetectors.
Article
Chemistry, Multidisciplinary
Weiye Yang, Junqi Tang, Quanhong Ou, Xueqian Yan, Lei Liu, Yingkai Liu
Summary: The ultrasensitive Ag-deposited TiO2 flower-like nanomaterial shows promising application in aquaculture due to its self-cleaning function, recyclability, and excellent SERS properties originating from localized surface plasmon resonance of Ag NPs and coupling field between Ag and TiO2 FLNMs.
Article
Materials Science, Multidisciplinary
Kamal Kant Kashyap, L. Hmar Jehova Jire, P. Chinnamuthu
Summary: In this article, Au-nanoparticle adorned TiO2-nanowire devices were synthesized using glancing angle deposition technique. These devices showed a large memory window and low interface trap density, indicating their potential for capacitive memory based applications. Compared to TiO2-nanowire devices, the Au-nanoparticle adorned TiO2-nanowire devices demonstrated higher endurance and stable retention.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Shi -Wei Lin, Mei-Hong Tong, Yan-Xin Chen, Rui Chen, Hai-Peng Zhao, Xia Jiang, Kai Yang, Can-Zhong Lu
Summary: Composite of rare earth oxides with TiO2 nanotube arrays effectively modifies the PEC behavior of TiO2. A CeO2/TiO2 heterojunction was prepared by loading CeO2 nanoparticles on anodized TiO2 nanotube arrays, demonstrating high photocurrent density and hydrogen evolution rate.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Benjamin D. Wiltshire, Mahnaz Alijani, Hanna Sopha, David Pavlinak, Ludek Hromadko, Raul Zazpe, Sitaramanjaneya M. Thalluri, Eva Kolibalova, Jan M. Macak, Mohammad H. Zarifi
Summary: To detect visible light at gigahertz frequencies, a planar microwave resonator was integrated with a high aspect ratio TiO2 nanotube (TNT) layer-sensitized CdS coating using atomic layer deposition (ALD). This integration improved the performance of light detection devices in digital technology. The CdS-coated TNT layer showed sensitivity to visible light up to a wavelength of approximately 650nm, and enhanced sensitivity to green and red light compared to the blank TNT layers. The CdS coating also improved the sensor's response to light exposure and resulted in shorter recovery times.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Mei-Hong Tong, Tian-Ming Wang, Shi-Wei Lin, Rui Chen, Xia Jiang, Yan-Xin Chen, Can-Zhong Lu
Summary: TiO2 is widely used as a photocatalyst for water splitting due to its high activity, low cost, abundance, safety, and stability. However, its further utilization is limited by its wide band gap and rapid recombination speed. In this study, ultra-thin carbon-doped TiO2 nanotube arrays were fabricated, which exhibited high photoelectrochemical activity and significantly narrowed band gaps and decreased charge resistance. The results suggest that ultra-thin carbon doping in TiO2 nanotube arrays can optimize photocatalysts for PEC water splitting.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Di Zhou, Rui Du, Zhenglong Hu, Shu Gao, Yafang Tu, Yunfei Fu, Guang Zheng, Youhua Zhou
Summary: Bi2MoO6/TiO2 heterostructures were synthesized, which exhibited excellent visible-light absorption due to the presence of Bi2MoO6 nanosheets. The hierarchical structure composed of Bi2MoO6 nanosheets and TiO2 nanorods significantly increased the specific surface area and pore volume of the photocatalysts. The improved performance of the Bi2MoO6/TiO2 heterostructures in methylene blue degradation was attributed to the extended absorption of visible light, the large specific surface area of the hierarchical structure, and the enhanced separation efficiency of electron-hole pairs.
Article
Nanoscience & Nanotechnology
Jamal Ahmad Khan, Yogita Maithani, J. P. Singh
Summary: In this study, Ag2Se nanorod arrays were fabricated using the GLAD technique and two-zone furnace, and Ag2Se planar films of different thickness were also prepared. The tilted Ag(2)Se nanorod arrays exhibited excellent thermoelectric performance with zT of 1.14 and a power factor of 3229.21 μW/m-K-2 at 300 K. The superior thermoelectric properties of the nanorod arrays could be attributed to the unique nanocolumnar architecture that facilitated efficient electron transport and phonon scattering at the interfaces. Furthermore, the nanoindentation measurements showed that the nanorod arrays had lower hardness values and elastic modulus compared to the Ag(2)Se films, indicating improved mechanical properties. The synergistic dependence between the tilt structure and thermoelectric properties, along with the simultaneous improvement in mechanical properties, provides a new avenue for the practical applications of Ag2Se in next-generation flexible thermoelectric devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Zijian Zhou, Kai Ou, Jiahong Dai, Wenting Zhang, Yongliang Tang, Yuxiang Ni, Yudong Xia, Hongyan Wang
Summary: In this study, multifold TiO2 nanorods with highly efficient photocatalytic performance for H-2 production were prepared using electron beam evaporation. The effects of annealing temperature and morphological structure on the photocatalytic performance were investigated. The optimal annealing conditions were found to be 550°C for 300 min in air. The multifold nanorods showed improved photocatalytic performances compared to the no-fold nanorods, with Z2 achieving a maximum photocurrent density of 1.35 mA/cm(2), which was six times higher than Z0 (0.2 mA/cm(2)). The smaller overall charge transfer resistance and larger BET surface area of Z2 were identified as the reasons for the maximum photocurrent density. The increase in specific surface area and number of active sites in the multifold structure contributed to the improved photocatalytic performance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Applied
Xiao Li, Xuezhe Yu, Haotian Zeng, Giorgos Boras, Kai Shen, Yunyan Zhang, Jiang Wu, Kwang Leong Choy, Huiyun Liu
Summary: GaAs nanowire-based metal-semiconductor-metal photodetectors achieve enhanced photoresponsivity and reduced response time through surface treatment and interfacial contact optimization. The design demonstrates good repeatability of dynamic photo-switching characteristics and stability, making GaAs nanowires a promising candidate for high-performance and reliable nano-photodetection in the visible range.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Stacy A. Lynrah, Pheiroijam Pooja, P. Chinnamuthu
Summary: Heterostructure MnO2/TiO2 thin film (TF) and nanowires (NW) were fabricated using Glancing angle deposition technique. The NWs showed a 15-fold enhancement in UV-Vis absorption and better noise performance compared to TF, with faster rise and fall time. This indicates great potential for NWs in applications of UV-Vis range photodetectors.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Singh H. Manas, Bijit Choudhuri, P. Chinnamuthu
Summary: This paper compares the advantages of a catalyst-free TiO2-NW/Ge-NW heterostructure to Ge-NW on Si substrate. The presence of TiO2 successfully suppresses GeO2 formation and reduces interface defects, leading to improved optical absorption and electrical characteristics. The Ag/TiO2-NW/Ge-NW/Si device exhibits superior performance with lower dark current and faster temporal response compared to Ag/Ge-NW/Si.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Pheiroijam Pooja, P. Chinnamuthu
Summary: Annealed TiO2/In2O3 nanowire metal-insulator-semiconductor devices exhibit superior performance with enhanced photosensitivity, responsivity, and quantum efficiency at 330 nm wavelength illumination, showing potential for efficient optoelectronics UV photodetection applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Correction
Chemistry, Physical
Pheiroijam Pooja, P. Chinnamuthu
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
S. Jimkeli Singh, P. Chinnamuthu
Summary: The study demonstrated that doping CuO nanoparticles with Ce can significantly improve the crystalline structure and optoelectronic properties, leading to enhanced photocatalytic degradation efficiency of dyes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Electrical & Electronic
Kamal Kant Kashyap, Monalisa Hazarika, Sardul Singh Dhayal, Paulsamy Chinnamuthu
Summary: The study focuses on the wettability switching behavior of gold-decorated titanium dioxide nanowires under UV light, showing improved wettability and transition rate compared to plain titanium dioxide nanowires. This enhancement is attributed to effective carrier separation and increased carrier lifetime, offering potential applications in self-cleaning and anti-fogging surfaces.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Amitabha Nath, Bikram Kishore Mahajan, Aniruddha Mondal, Laishram Robindro Singh, Mitra Barun Sarkar
Summary: This paper studies the impact of a high-performance nanostructured device using metal nanoparticle (NP) deposition, with a focus on an Ag NP coated In2O3 nanostructured device. Through analysis of morphology, crystal structures, and electrical characteristics, it was found that the Ag NP coated device exhibited improved conductance and trap states, making it suitable for various applications such as catalysts and medical devices.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2021)
Article
Engineering, Electrical & Electronic
Stacy A. Lynrah, P. Chinnamuthu
Summary: This work successfully fabricated MnO2 nanowires and examined the influence of gold and silver on the electrical characteristics of the metal-semiconductor junction, with gold proving to be a better candidate, especially in optoelectronics applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Avijit Dalal, Madhuri Mishra, Subhananda Chakrabarti, Rajeev Kumar Gupta, Aniruddha Mondal
Summary: Co-doping of Mg into chemically stable TiO2 thin film enhances the light sensitivity for deep UV detection. The Mg-doped TiO2 thin film exhibits superior hydrophobicity, while the undoped TiO2 thin film shows high responsivity in the visible region. The Mg:TiO2 photodetector demonstrates significantly higher light sensitivity compared to undoped TiO2 thin film at 200 nm illumination.
Article
Engineering, Electrical & Electronic
Avijit Dalal, Ankita Bebarta, Argha Deep Paul, Rabindranath Barman, Jean-Michel Nunzi, Alexey Tameev, Rajat Mahapatra, Aniruddha Mondal
Summary: We developed a three-terminal ion-sensitive device (TTISD) as a sensor for the detection of glucose and arsenic dissolved in water. The device was fabricated using the e-beam evaporation and glancing angle deposition (GLAD) technique. The TiO2 nanowires (NWs) were grown by GLAD on the conducting nafion channel of the TTISD to immobilize the test specimens. This work presents a nano-hybrid platform for the detection of low-concentration glucose and high-concentration arsenic in drinking water, with a rapid response time of approximately 1 second.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Applied
Ankita Choudhury, Arka Dey, Chiranjib Ghosh, Avijit Dalal, Rajat Mahapatra, Saikat Biswas, Nilanjan Halder, Aniruddha Mondal
Summary: Glancing angle deposition is used to synthesize undoped and Mg-doped GeO2 nanowires with different Mg concentrations. The morphology and crystallinity of the materials are examined through microscopic images and selected area electron diffraction (SAED) patterns. The introduction of Mg affects the crystallinity, leading to a transition from polycrystalline to amorphous structure. The presence of Mg is confirmed through Fourier transmission spectrum analysis. The electrical behavior of Au/undoped GeO2 devices follows the thermionic emission process, while the conductance of Mg-GeO2 devices decreases with increasing temperature due to the positive temperature coefficient of resistance caused by random grain boundaries and electron trapping at the junction.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Surbhi Pathania, Jehova Jire L. Hmar, Vinay Kumar, Paulsamy Chinnamuthu
Summary: This study investigates the resistive switching memory in conducting polymer PEDOT:PSS and finds that it exhibits stable non-volatile memory characteristics, making it suitable for low-power flexible non-volatile memory devices.
Article
Chemistry, Multidisciplinary
Kripasindhu Karmakar, Arka Dey, Subhendu Dhibar, Rajib Sahu, Subham Bhattacharjee, Priya Karmakar, Priyajit Chatterjee, Aniruddha Mondal, Bidyut Saha
Summary: A unique strategy for synthesizing a supramolecular metallogel using zinc ions and adipic acid in DMF medium was established at room temperature. Rheological analysis, field emission scanning electron microscopy, and transmission electron microscopy were used to investigate the mechanical and morphological characteristics of the supramolecular Zn(ii)-metallogel. The electrical conductivity of the metallogel-based device, which exhibited a hexagonal shape, was explored and found to be 7.38 x 10(-5) S m(-1). The device showed semiconductor properties, specifically a Schottky barrier diode nature.
Review
Chemistry, Multidisciplinary
Antonio F. A. A. Melo, Salam J. Singh, Paulsamy Chinnamuthu, Frank N. Crespilho, Gaulthier Rydzek
Summary: In recent years, magnetically stimulated bio-and electrochemical systems have become increasingly important due to their enhanced sensitivity and selectivity, improved spatial control, and ability to operate in complex environments, offering significant advantages over conventional systems. This review provides a comprehensive and informative survey on the state-of-art as well as recent efforts and applications in the past decade, focusing on new functional magnetic materials and nano-architectonic interfaces that have led to promising advances in biosensors, biofuel cells, and their integration into devices. Future directions and perspectives are also discussed.
Article
Engineering, Electrical & Electronic
Pheiroijam Pooja, P. Chinnamuthu
Summary: We report on the memory performance study of vertically stacked TiO2/In2O3 metal oxides heterostructure (MOH) nanowire (NW). TiO2/In2O3 MOH NW displayed a wide memory window of 8.8V and low interface trap density (D-it) & SIM; 2.55 x 10(11) eV(-1)cm(-2). The endurance of ON/OFF switching cycles for the TiO2/In2O3 MOH NW device was up to 1000 cycles, with a resistance ON/OFF ratio of & SIM;20 and a stable retention time of 6500s.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2023)
