Article
Physics, Applied
Shagolsem Romeo Meitei, Leimapokpam Sophia Devi, Naorem Khelchand Singh
Summary: In this study, thin-film of beta-Ga2O3 was fabricated on Si-substrate using e-beam evaporation technique. The average crystallite size was found to be around 39.8 nm. The beta-Ga2O3 thin-film exhibited a smooth surface without cracks or pits, with an average thickness of approximately 375 nm. The photodetector made from beta-Ga2O3 thin-film showed excellent performance, with minimum dark current, high L/D ratio, and short rise and fall times. The remarkable consistency and reproducibility of the beta-Ga2O3 thin-film photodetector suggest promising practical applications for UV PDs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Lin-Bao Luo, Ting Fang, Chao Xie, Li Wang, Di Wu, Feng-Xia Liang
Summary: A wavelength sensor capable of distinguishing illumination with wavelengths ranging from ultraviolet to near infrared has been developed. The sensor is composed of two parallelly stacking graphene/thin Si/graphene heterojunction devices, displaying different optical properties under various light illuminations according to theoretical simulation. The numerical equation can accurately determine the wavelength in the range from 265 to 1050 nm with a low error rate, suggesting potential application for future optoelectronic systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Akshta Rajan, Vishal Gupta, Kashima Arora
Summary: ZnO films with varying thicknesses were deposited for UV photodetection. The photoconductivity parameters of the photodetector were studied for UV radiation with a 365 nm wavelength. The deposited ZnO films showed poly-crystallinity with rough surfaces and oxygen-related defects, which enhanced UV photosensitivity. The photoconducting mechanism was studied using statistical interpretation of defects observed from photoluminescence spectra deconvolution. The 221 nm thick ZnO film exhibited improved photoconducting parameters due to increased defect density.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yurun Liang, Yuewen Zhang, Jie Xu, Jingli Ma, Huifang Jiang, Xin Li, Baolin Zhang, Xu Chen, Yongtao Tian, Yanbing Han, Zhifeng Shi
Summary: SrZrS3 is a promising chalcogenide perovskite with unique advantages, including high abundance of consisting elements, high chemical stability, strong light absorption, and excellent carrier transport ability. A large-area and uniform SrZrS3 thin film was prepared by facile sputtering method, which exhibited high crystallinity and a band gap of 2.29 eV. The thin film showed high light absorption coefficient and carrier mobility, making it suitable for photodetector applications.
Article
Chemistry, Physical
Yurun Liang, Yuewen Zhang, Jie Xu, Jingli Ma, Huifang Jiang, Xin Li, Baolin Zhang, Xu Chen, Yongtao Tian, Yanbing Han, Zhifeng Shi
Summary: In this study, large-area and uniform SrZrS3 thin film was successfully prepared, demonstrating high crystallinity, high absorbance coefficient, and high carrier mobility. These advantages make SrZrS3 thin film a promising candidate for photodetectors, solar cells, and other optoelectronic devices.
Article
Materials Science, Ceramics
M. Chakraborty, E. S. Kadir, R. N. Gayen
Summary: By varying the graphene oxide (GO) content, the modification of UV photo-response characteristics in transparent titanium dioxide-graphene oxide (TiO2-GO) nanocomposite thin films was studied. The presence of GO improves the optical band gap of TiO2 without affecting its transparency. The fabricated metal-semiconductor (MS) Schottky junctions with TiO2-GO nanocomposite thin films show rectifying behavior and improved UV response characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Nashreen F. Patel, Sanjay A. Bhakhar, Hiren S. Jagani, G. K. Solanki, Pratik M. Pataniya
Summary: In recent years, semiconducting transition metal chalcogenides (TMCs) have shown promising potential for optoelectronic applications due to their strong light absorption across a wide spectrum. Photodetectors based on layered TMCs have garnered significant attention as a substitute for silicon-based materials. In this study, a large area photodetector based on thermally evaporated Bi2Se3 thin film for visible light detection was fabricated. The thin film had a thickness of 5000 angstroms and exhibited a highly crystalline structure with a prominent orientation of (006). The photodetector demonstrated excellent light sensitivity in a broad spectral range from 485 to 670 nm, achieving a photocurrent as high as 50.96 mu A and a photo responsivity of 2.12 mA/W under white light with a power intensity of 100 mW/cm2. Moreover, the photodetector exhibited excellent stability towards pulse photoresponse during numerous cycles of light pulse, thanks to the stable nature of the Bi2Se3 thin film. This study presents the development of Bi2Se3 thin film as a light harvesting material for future optoelectronic devices, contributing to pollution-free energy generation through sunlight utilization.
Article
Chemistry, Analytical
Natheer A. Algadri, Ahmad M. AL-Diabat, Naser M. Ahmed
Summary: The chemical spray pyrolysis technique was used to synthesize zinc sulfide thin films without annealing treatment. The ZnS films showed distinct characteristics with different Zn:S ratios, and exhibited a strong response to UV illumination when used in MSM photodetectors.
INSTRUMENTATION SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Shuvaraj Ghosh, Malkeshkumar Patel, Chanhyuk Choi, Junghyun Lee, Joondong Kim
Summary: In this study, a co-sputtered Mo-doped BiVO4 thin films-based self-powered transparent photodetector (TPD) was developed. The TPD device showed a high photo-to-dark current ratio and detectivity, and exhibited fast response speed and high visible transparency. This Mo:BiVO4-based TPD device explores the potential of BiVO4 in the field of transparent optoelectronics and onsite power generation.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
P. V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy, Vasudeva Reddy Minnam Reddy, Maddaka Reddeppa, Moon-Deock Kim
Summary: Tungsten trioxide (WO3) deposited at 10 mTorr sputter pressure demonstrated high sensitivity and external quantum efficiency (EQE) for UV photodetector applications. The effect of sputter pressure on the crystallinity, morphology, and photodetector performance of WO3 films was studied, showing that films deposited at 10 mTorr had higher crystallinity and surface roughness, making them suitable for UV photodetector applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Multidisciplinary
Umit Dogan, Fahrettin Sarcan, Kamuran Kara Koc, Furkan Kuruoglu, Ayse Erol
Summary: This paper investigates the effects of annealing temperature on the performance of a ZnO thin film-based UV photodetector. The results show that increasing the annealing temperature leads to larger grain sizes in the ZnO film, resulting in a red shift in the cut-off wavelength and enhanced sensitivity and speed of the photodetector.
Article
Chemistry, Physical
Bo Feng, Haiyuan Lv, Jie Liu, Rongrong Chen, Hongyan Zhu, Xinyu Han, Caina Luan, Hongdi Xiao
Summary: In this study, high-quality p-type CuInO2 epitaxial thin films were successfully grown on GaN wafers using pulsed laser deposition technology. The films exhibited a bandgap of around 3.99 eV. The quality of the CuInO2 thin film improved with decreasing oxygen pressure, and the highest quality film demonstrated high photoresponsivity and fast response speed in a solar-blind wavelength.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yi-Bo Tian, Koichi Tanaka, Li-Mei Chang, Christof Woell, Zhi-Gang Gu, Jian Zhang
Summary: In this study, monolithic and highly oriented chiral metal-organic framework (MOF) thin films were successfully prepared using a layer-by-layer method. The helicity-sensitive absorption of these films showed excellent performance, with an anisotropy factor of 0.41. The chiral MOF thin films also exhibited significant differences in the uptake of enantiomers. A portable sensor device was fabricated to demonstrate the potential for chiral recognition and analysis by monitoring photocurrent signals. This research introduces a new concept for direct circularly polarized photodetectors using chiral building blocks and offers a blueprint for novel devices in chiral optics.
Article
Chemistry, Physical
Qiang Hui, Qiankun Li, Shun Wang, Jinshuo Xue, Ziwen Zhou, Yiqi Hu, Zhou Zhou, Zhijian Feng, Qingyu Yan, Fengang Zheng, Yuyan Weng, Lu You, Liang Fang
Summary: A high-quality BVO film photodetector was successfully fabricated using magnetron sputtering and postannealing treatment, and its performance was improved by optimizing the grain size distribution and grain boundary density modulation. The basic mechanism of photocurrent optimization was discussed in detail. Additionally, by reducing the thickness of the mica substrate, the BVO film photodetector exhibited high mechanical flexibility and bending robustness with optimized optoelectronic properties, showing great potential for future flexible device applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Laishram Thoibileima Chanu, Mir Waqas Alam, Mohd Farhan, Naorem Khelchand Singh
Summary: This work presents the fabrication and characterization of NiO thin films on Si substrates. The as-deposited and annealed samples were analyzed using field emission scanning electron microscopy and X-ray diffraction. The electrical properties of the devices were tested with an Au electrode. The results demonstrate the suitability of NiO thin films for photodetector applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Yen-Pu Chen, Mengwei Si, Bikram Kishore Mahajan, Zehao Lin, Peide D. Ye, Muhammad Ashraful Alam
Summary: Recently, BEOL compatible In2O3 thin-film transistors grown by ALD have achieved high drain current and small threshold voltage shift under stress conditions. The reliability issues of PBTS and HCD, characterized by a two-stage threshold voltage shift, are attributed to electron trapping/trap-generation and hydrogen-assisted formation of donor-traps. The correlation between HCD and PBTS in BEOL-TFTs is due to the stronger vertical field in an ultrathin device.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Clinical Neurology
Hee Sahng Chung, Gerd Melkus, Pierre Bourque, Santanu Chakraborty
Summary: This study aimed to investigate the prevalence of motor band sign (MBS) in amyotrophic lateral sclerosis (ALS) and primary lateral sclerosis (PLS), its correlation with clinical upper motor neuron (UMN) signs, and its prognostic value in ALS. The results showed a high frequency of MBS in ALS and PLS, with significantly positive correlations between susceptibility measurements in motor cortices and contralateral UMN signs in ALS. However, there were no significant differences in clinical outcomes between ALS patients with and without MBS at last follow-up.
CANADIAN JOURNAL OF NEUROLOGICAL SCIENCES
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
David McComiskey, Undrakh-Erdene Erdenebold, Matthew D. F. McInnes, Jean-Paul Salameh, Robert Chatelain, Carlos Torres, Santanu Chakraborty, Nader Zakhari
Summary: The role of dual-energy computed tomography (DECT) and virtual monoenergetic energy levels in reducing shoulder artifact to improve visualization of the cervical spinal canal was explored in this study. A retrospective review of 171 DECT scans of the neck was performed, and subjective comparisons and objective image noise were analyzed to determine the optimal DECT energy level.
JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY
(2023)
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
Engineering, Electrical & Electronic
Ratul Kumar Baruah, Bikram Kishore Mahajan, Sujay Routh
Summary: In this study, a double-gate junctionless SiC FET with an embedded P+ pocket in the oxide layer (P+-SiCJLT) is investigated for high-temperature and high-voltage applications. The P+-SiCJLT exhibits better performance compared to a device of similar dimensions without the P+ layer (SiCJLT), as it allows for efficient volume depletion, improves current ratios, enhances intrinsic gain, and enables enhancement-mode operation.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
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.
Article
Otorhinolaryngology
Nauman H. Malik, Rui Fu, Nicolin Hainc, Christopher W. Noel, John R. de Almeida, Ali Hosni, Shao Hui Huang, Eugene Yu, Agnieszka Dzioba, Andrew Leung, Arvindpaul Mangat, Danielle MacNeil, Anthony C. Nichols, Shivaprakash B. Hiremath, Santanu Chakraborty, Alboorz Jooya, Marc Gaudet, Stephanie Johnson-Obaseki, Jonathan Whelan, Reza Forghani, Michael P. Hier, Gregoire Morand, Khalil Sultanem, Joseph Dort, John Lysack, Wayne Matthews, Steven Nakoneshny, Gia Gill, Adam Globerman, Paul Kerr, Pejman Maralani, Irene Karam, Antoine Eskander
Summary: This study aimed to evaluate the association between primary tumor volume and oncologic outcomes in patients with T3 glottic cancer treated with (chemo)radiotherapy. The study found that increasing tumor volume was associated with worse overall survival and disease-free survival in these patients.
JAMA OTOLARYNGOLOGY-HEAD & NECK SURGERY
(2023)
Article
Materials Science, Paper & Wood
Dipankar Das, Jayanta Das, Ajit Debnath, Santanu Chakraborty, Biswajit Saha
Summary: Polyaniline-graphite (PANI-Graphite) composite deposited on cellulose paper substrate was studied for the development of a glucose biosensor kit. The physical characterizations of the prepared samples were carried out, and the sensing responses of glucose with different concentrations were observed. The results indicate that PANI-Graphite on cellulose would be a potential candidate for glucose concentration detection due to its lightweight, low cost, flexibility of a paper-based kit, and biodegradability.
Article
Biochemistry & Molecular Biology
Shreya Das, Arunima Mondal, Chandrani Dey, Santanu Chakraborty, Rudranil Bhowmik, Sanmoy Karmakar, Arunima Sengupta
Summary: In the mammalian heart, fetal cardiomyocytes proliferate prior to birth and adult cardiomyocytes re-enter the cell cycle postinjury to promote cardiac regeneration. Disruption of the endoplasmic reticulum (ER) machinery leads to ER stress, which has a fine balance between protective and proapoptotic responses. T-box transcription factor 20 (Tbx20) is upregulated in ER stress and promotes cardiomyocyte proliferation and limits apoptosis.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Dipankar Das, Jayanta Das, Krishna Deb, Santanu Chakraborty, Biswajit Saha
Summary: The designing of low-cost, flexible, and easily degradable sensors with organic materials compositions is a challenging task in recent advancements in sensor technology. A high-performance urea sensing device was developed by depositing polyaniline (PANI) on the surface of graphite (Gr) incorporated cellulose paper substrate. The PANI/Gr composite on a cellulose substrate showed notable urea sensing property, making it an active sensing material for low-cost, non-enzymatic detection of urea.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Medicinal
Manami Dhibar, Santanu Chakraborty, Souvik Basak, Paramita Pattanayak, Tanmay Chatterjee, Balaram Ghosh, Mohamed Raafat, Mohammed A. S. Abourehab
Summary: In this research, the influence of drug-coformer stoichiometric ratio on cocrystal design and its impact on solubility, dissolution, and bioavailability of poorly soluble telmisartan were investigated. The optimal molar ratio was determined using molecular docking, and a new multicomponent solid form, telmisartan-maleic acid cocrystals, was synthesized and characterized. The results showed that the cocrystals exhibited significantly improved solubility, dissolution, and bioavailability compared to the crystalline form of telmisartan.
Article
Environmental Sciences
Anwesha Das, Sarbashri Bank, Srilagna Chatterjee, Nirvika Paul, Kunal Sarkar, Arindam Chatterjee, Santanu Chakraborty, Chaitali Banerjee, Anasuya Majumdar, Madhusudan Das, Sudakshina Ghosh
Summary: This study aimed to investigate the effect of the synthetic pyrethroid bifenthrin (BF) on mitochondrial DNA copy number variation in the edible fish Punitus sophore. Results showed that BF reduced the expression level of mitochondria COI gene, inhibited complex IV activity, and led to oxidative stress and mitochondrial dysfunction. BF also induced neurotoxicity by inhibiting AchE activity and caused an imbalance in antioxidant enzyme activity. Molecular docking and simulation analysis predicted that BF binds to the active sites of the enzyme. These findings suggest that the reduction of mtDNAcn could be a potential biomarker to assess BF-induced toxicity in aquatic ecosystems.
Article
Engineering, Electrical & Electronic
Farhana Yasmin Rahman, Rahul Deb, Surajit Sarkar, Hritinava Banik, Md. Jashim Uddin, Santanu Chakraborty, Debajyoti Bhattacharjee, Syed Arshad Hussain
Summary: The locally available leaves of Ipomoea carnea (IC) were used to design a nonvolatile resistive memory device with good characteristics such as high ON/OFF ratio, device yield, reproducibility, and physical stability. The device performance was improved by UV irradiation. Space charge-limited conduction, Schottky emission, and metallic filament formation were identified as the key mechanisms behind the observed switching behavior. Atomic force microscopy measurements confirmed the existence of conduction filament in the IC-based resistive device. The proposed IC-based switching devices may be utilized to design rewritable read-only memory devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Shivaprakash B. Hiremath, Asthik Biswas, Gopolang Mndebele, David Schramm, Birgit B. Ertl-Wagner, Susan I. Blaser, Santanu Chakraborty
Summary: Sensorineural hearing loss is caused by abnormalities affecting the inner ear, such as malformations and conditions that affect the auditory pathway. Cochlear implantation is increasingly used for hearing rehabilitation. An understanding of inner ear anatomy and diseases is crucial for surgical planning and to avoid complications. This article reviews imaging protocols, inner ear anatomy, cochlear implant devices, and discusses congenital and acquired causes of sensorineural hearing loss.
