Article
Chemistry, Physical
Ye Tian, Hui Peng, Shangfei Yao, Zhijie Zhou, Bao Ke, Wenchao Lin, Fuxi Lu, Zongmian Yu, Wenyong Jia, Yongyou Zhang, Bingsuo Zou
Summary: In this study, a Sn-doped CdS microcone with tunable microcavity properties was reported, and the tuning range exceeded 300 nm, which is the largest tunable range in a single nanostructure. Photoluminescence mapping showed the presence of a periodic structure and the selection propagation of longitudinal photons in the Sn-doped CdS microcone. Cross-sectional radius-dependent PL spectra revealed a continuous transition from a multimode to three-mode microcavity with decreasing cross-section radius, indicating the characteristics of different whisper-gallery mode microcavity. Calculation results showed that the plane-wave model can effectively describe the spectral profile.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Arun Thapa, Yuba Raj Poudel, Rui Guo, Katherine L. Jungjohann, Xuewen Wang, Wenzhi Li
Summary: In this study, high-performance vertically aligned carbon nanotube pillar-based field-emitter arrays were synthesized directly on stainless-steel substrate using plasma-enhanced chemical vapor deposition. The nanosphere lithography technique was employed to control the growth sites and sizes of the arrays, leading to remarkable field emission properties. The excellent field emission performance can be attributed to the high conductivity of the substrate, low contact resistance, suitable number of active emitters, and reduced screening effect between the pillars.
Article
Materials Science, Multidisciplinary
Marina V. Il'ina, Oleg I. Il'in, Andrey V. Guryanov, Olga I. Osotova, Yuriy F. Blinov, Alexander A. Fedotov, Oleg A. Ageev
Summary: Aligned carbon nanotubes exhibit an abnormally large piezoelectric strain coefficient, making them promising for nanopiezotronic device production and explaining anomalous effects seen in CNTs and devices based on them.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Chandradip D. Jadhav, Sachin R. Rondiya, Reshma C. Hambire, Devashri R. Baviskar, Avinash V. Deore, Russell W. Cross, Nelson Y. Dzade, Padmakar G. Chavan
Summary: Klockmannite (CuSe) was successfully synthesized using a three-probe electrochemical set-up, with vertically aligned nanosheets showing impressive field emission characteristics. The CuSe nanosheets exhibited low turn-on field and high current density, attributed to the metallic conductivity and low work function of the (001) surface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Benjamin T. Diroll, James P. Cassidy, Dulanjan Harankahage, Muchuan Hua, Xiao-Min Lin, Mikhail Zamkov
Summary: This study investigates the two-photon properties of colloidal quantum shells, specifically the CdS/CdSe/CdS quantum shell samples. The results show that these quantum shells exhibit large non-linear absorption cross-sections and advantageous multiexciton physics. They have potential applications in upconversion imaging and can be utilized as excellent gain media for two-photon excitation. Additionally, quantum shell solids support multimodal amplified spontaneous emission due to their broad gain bandwidth and long gain lifetime.
Article
Chemistry, Multidisciplinary
Mengjie Li, Qilong Wang, Ji Xu, Jian Zhang, Zhiyang Qi, Xiaobing Zhang
Summary: In this study, vertical carbon nanotube arrays (VCNTAs) are reported as high-density electron sources that can modulate emission processes with laser pulses under a high applied electric field and laser illumination. The emission process shows sensitivity to a power law of the laser intensity as bias electric field and laser power density increase, supporting the mechanism of optically induced field emission followed by over-the-barrier emission. The polarization dependence exhibits a cosine behavior, confirming the likelihood of optically induced field emission.
Article
Materials Science, Multidisciplinary
Jiashuo Yan, Yongzhen Huang, Zhigang Cao, Yukai An
Summary: In this study, high-quality WS2 nanowires with good physical and chemical properties were successfully synthesized through chemical vapor deposition using sulfides and halides with transition metal oxides as precursors. The growth of WS2 nanowires was investigated by varying experimental parameters. The deposited WS2 nanowires were found to have a smooth surface, uniform size, and density distribution, with a diameter of about 200 nm and the hexagonal 2H phase structure. The field emission properties of the WS2 nanowires showed good turn-on field and threshold field, as well as excellent stability, attributed to their unique geometrical features.
Article
Chemistry, Physical
Dmitry A. Kudryashov, Ivan A. Morozov, Alexander S. Gudovskikh
Summary: A three-dimensional computer simulation was conducted to investigate the performance of flexible double-junction solar cells consisting of Si wires and p-i-n a-Si:H structures. The results showed that the open-circuit voltage (V-OC) decreases with an increase in the height of the Si wires, while the short-circuit current density (J(SC)) for the top p-i-n a-Si:H junction increases sharply with Si wire height and saturates at a certain wire height. The absolute value of J(SC) increases with a decrease in the wire diameter. For tandem SCs, the optimal wire height is 10 μm, achieving an efficiency of 14% with specific wire diameter and charge carrier lifetime.
INTERNATIONAL JOURNAL OF PHOTOENERGY
(2022)
Article
Chemistry, Multidisciplinary
Beibei Dai, Chao Fan, Xing Xu, Zhuodong Qi, Qin Xiao, Jinhui Wei, Sha Jiang, Qinglin Zhang
Summary: Flag-like CdS microstructures were grown via a PVD route with the assistance of a Pb catalyst and CdS wire sidewall template. The higher defect density in the CdS flag compared to the CdS wire leads to a wider optoelectronic response range for the former. The growth mechanism was well understood through investigating the morphology evolution of the sample at different growth stages.
Article
Chemistry, Physical
Jia-Siang Ye, Bohr-Ran Huang, Jinn P. Chu
Summary: The field emission properties of a novel ZnO-NWs/Cu-based metallic glass nanotube array (ZNWs/CuMeNTA) heterostructure were studied, with post-treatment affecting the turn-on electric field by enhancing crystallization and the balance between ZnO-NWs breakdown.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Sang Hoon Lee, Byung Joo Jeong, Kyung Hwan Choi, Jiho Jeon, Bom Lee, Sooheon Cho, Han Eol Jang, Hyeon Ho Cho, Hyung-Suk Oh, Bum Jun Kim, Hak Ki Yu, Jae-Young Choi
Summary: In this study, a one-dimensional (1D) van der Waals material Nb2Se9 was grown as nanowire arrays using a liquid precursor-assisted chemical vapor deposition (CVD) process. Compared to other synthesis methods, the aligned Nb2Se9 nanowires exhibit higher photoresponse and stability. This controllable CVD growth offers a possibility of using aligned Nb2Se9 nanowires as building blocks for large integrated circuits based on 1D materials.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Pengfei Hu, Dong Zhou, Shiqing Xu, Qianru Ma, Jiaqi Yin, Yali Cao, Jing Xu
Summary: This study successfully achieved room-temperature aqueous phase- and size-controlled synthesis of CdS nanocrystals by modulating the pH value and using chelator ethylenediamine for guiding the assembly of nanocrystals.
Article
Chemistry, Physical
Arun Thapa, Xuewen Wang, Wenzhi Li
Summary: The study successfully synthesized copper-filled vertically aligned carbon nanotubes, with the filling of copper controlled by tuning the growth temperature, significantly improving the field emission properties of the carbon nanotubes.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tianwei Duan, Jing Ai, Xiaoyan Cui, Xiaowei Feng, Yingying Duan, Lu Han, Jingang Jiang, Shunai Che
Summary: This study reports the phenomenon of spontaneous chiral symmetry breaking in the self-assembly of cadmium chalcogenide nanorods, resulting in chiral biases away from racemates. The presence of stable helical dislocation structures suggests the possibility of helical structures emerging in an achiral environment, leading to hierarchical chiral films induced by simple solvent evaporation self-assembly of HCCNs. The spontaneous enantiomeric excess between batches is speculated to originate from enantiomeric excess seed assembly inducing a one-handedness dominated system based on the majority rules.
Article
Chemistry, Multidisciplinary
Xingyu Wang, Yuhao Luo, Jihui Liao, Ernesto Joselevich, Jinyou Xu
Summary: This study proposes a versatile method for growing orientation-controlled organic nanowires with predictable positions by combining the selective shadow effect of microsized holes with the graphoepitaxial mechanism along periodic nanofeatures. Simulations confirmed that the selective-area graphoepitaxial growth is driven by the hole-tailored mass-flow field. An in-situ integrated device based on Alq3 nanowires exhibited intriguing performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Maryam Zebarjad, Farid Jamali-Sheini, Ramin Yousefi
Summary: In this study, nanostructured pyrite (FeS2) films doped with different concentrations of Zn were fabricated using the electrodeposition method. Photodetectors were made using FTO/TiO2/un- and Zn-doped FeS2/Au configurations for optoelectronic applications. The effects of Zn concentration and TiO2 buffer layer on device efficiency were investigated. Results showed that Zn doping increased photocurrent and conductivity, reduced recombination rate and defects, and enhanced carrier mobility. The device with the lowest Zn doping concentration exhibited the highest efficiency, with an EQE of 48.16%, an R of 206.30 mAW(-1), and a D* of 3.3x10(+9) (Jones) in the visible light spectrum.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Maryam Zamani, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: This research investigated the effect of Ag coating on the physical properties of mesostructured bismuth sulfide (Bi2S3) films for optoelectronic applications. The results showed that Ag coating reduced the morphology size on the surface of the film, decreased the optical energy band gap, and increased the carrier concentration and flat band potential. The study also revealed the presence of space-charge-limited current behavior in the free-coated device, indicating changes in the electronic band structure due to Ag coating. The addition of Ag coating enhanced the quality parameters of the photodetectors, and the response increased with longer wavelengths. Mesostructured Bi2S3 films have the potential to be used as self-powered and ultraviolet-to-visible range photodetectors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Behrouz Baghbanzadeh-Dezfuli, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: In this research, the effect of sulfur dopant concentrations on the physical properties of nanostructured antimony selenide films was investigated. It was found that sulfur dopant changed the size of nanoparticles on the film surface and improved the electrical and photodetection performance of the devices.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Shubhankar Barman, Swadesh Paul, Priya Ranjan, Surajit Das, Anuja Datta
Summary: Lead-free ZnTiO3 hexagonal nanocrystals prepared through hydrothermal synthesis show stable ferroelectricity and a dielectric anomaly at 728 K. Direct ferroelectric measurements confirm stable and highly saturated polarization up to 723 K. Furthermore, a piezoelectric nano (composite) generator fabricated from these nanocrystals exhibits excellent performance, delivering a steady power density of 95 mu W/cm(3) at 1M Omega load.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Shubhankar Barman, Aritri Pal, Anurag Mukherjee, Suhrit Ghosh, Anuja Datta
Summary: This study reveals a remarkable chirality effect on modulating ferroelectricity in hydrogen-bonded supramolecular assemblies. By investigating two structurally similar conjugated molecules, it is found that the chiral derivative exhibits stable ferroelectricity, while the achiral derivative lacks notable ferroelectricity. This finding is significant for predicting the future soft ferroelectric low-power electronic systems.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Behrouz Baghbanzadeh-Dezfuli, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: In this study, antimony selenide (Sb2Se3) nanostructure films were deposited by the electrodeposition method using deionized water and ethylene glycol as solvents. The films were analyzed and compared using different methods, and it was found that using ethylene glycol as a solvent resulted in more suitable stoichiometric ratio, enhanced uniformity, and compactness in the structure of Sb2Se3 films.
Article
Materials Science, Multidisciplinary
Bhargab P. Mondal, Surajit Das, Priya Ranjan, Anuja Datta
Summary: This study presents the optimization of output performances of flexible and hybrid inorganic-organic thermoelectric generators (PTEGs) fabricated on paper substrates. Different qualities of stationery papers were found to significantly affect the output performance of the PTEGs due to their variance in substrate roughness. The use of emery paper as the substrate resulted in better performance compared to office paper, with output powers of around 1.93 nW and 0.68 nW obtained for TE generators prepared from emery and office paper legs, respectively. The transient flexibility and fatigue of each device type were also tested, and emery paper-based PTEG was found to be more robust. A detailed comparison of device performances on different paper substrates was experimentally presented and computationally validated.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Energy & Fuels
Bhargab P. Mondal, Priya Ranjan, Gourab Sarkar, Anuja Datta
Summary: This study introduces an economic emery paper-based thermoelectric generator (PTEG) using graphite and bismuth as its main materials, prepared by a simple bulk tracing process. The scalability of the fabricated PTEGs is demonstrated by the direct proportionality between Seebeck voltage and the number of p-n modules. This approach can be extended to other organic and inorganic thermoelectric materials, contributing to the research in self-powered heat sensors, wearables, and thermal harvesters in IoT equipment.
Article
Thermodynamics
Somayeh Kamalifar, S. M. Peyghambarzadeh, Shima Azizi, Farid Jamali-Sheini
Summary: Fouling is a major cause of energy loss in oil industry, leading to significant economic losses when oil operation units are shut down. There is currently no global or specific solution for reducing crude oil fouling. This study proposes an accurate and sensitive thermal method for fouling detection in crude oil systems, and investigates the impact of key operating parameters on fouling rate. The results show that heat flux, bulk temperature, and fluid velocity have direct or inverse relationships with fouling rate.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Physical
Swadesh Paul, Shubhankar Barman, Aritri Pal, Anurag Mukherjee, Suhrit Ghosh, Anuja Datta
Summary: This article investigates the piezoelectricity in chiralsupramolecular assemblies of trialoxybenzamide-functionalized acceptor-donor-acceptor (ADA)-type ambipolar π-systems. The optimized structure (AD(2)A) shows highly promising open-circuit voltage and short-circuit current density, indicating its potential for application in piezoelectric devices. Moreover, the H-bonding-driven supramolecular polymerization and the chirality of the chains play important roles in achieving long-range order and macroscopic polarization.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mohsen Cheraghizade, Farid Jamali-Sheini
Summary: This research investigated the impact of different zinc (Zn) concentrations on the physical and optoelectronic properties of copper selenide (Cu3Se2) nanostructures for self-powered and solar-range photodetector applications. The results showed the formation of a tetragonal Cu3Se2 phase with a spherical morphology. The samples exhibited Cu-poor stoichiometry, and the incorporation of Zn atoms in the Cu3Se2 lattice reduced the optical energy band gap. It was observed that Zn concentrations activated the space charge-limited conduction (SCLC) mechanism in the Cu3Se2 devices. The study of band alignments and barrier potentials at different interfaces provided insights into the observed transportation mechanism. Finally, the Zn-doped sample with the highest Zn concentration demonstrated the highest values of responsivity (R), gain (G), and specific detectivity (D*) at 0.127 mA/W, 21.77%, and 3.92 x 10+8 Jones, respectively.
Article
Chemistry, Inorganic & Nuclear
Mehrdad Kavosh, Farid Jamali-Sheini, Ramin Yousefi, Mohsen Cheraghizade
Summary: This research examines the physical and electrical properties of copper sulfide (CuS) nanostructures grown using the sonochemical method. The impact of incorporating zinc (Zn) dopant at varying concentrations is analyzed through various techniques. The study reveals that Zn dopant increases the strain on the crystal lattice of CuS, resulting in a hexagonal covellite structure and smaller CuS nanostructures. Optical analyses indicate changes in absorption intensity and photoluminescence emissions with the addition of Zn dopant, while the electrical properties of CuS are improved. Ultimately, the study demonstrates the enhancements in physical and electrical properties of Zn-doped CuS samples, leading to improved quality parameters of the photodetector.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Shubhankar Barman, Priya Ranjan, Anuja Datta
Summary: A new chiral hybrid single crystal with excellent circular polarized luminescence (CPL) activity has been synthesized using a solvent evaporation process at room temperature. It has versatile applications in optical displays, encrypted transmission, and quantum communications.
CHEMICAL COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Shubhankar Barman, Aritri Pal, Anurag Mukherjee, Swadesh Paul, Anuja Datta, Suhrit Ghosh
Summary: This review provides an overview of the research status and future development of organic ferroelectric materials. Among them, donor-acceptor charge transfer complexes are considered promising for ferroelectricity. The review lists different organic systems and molecular assembly forms, and discusses their performances in terms of ferroelectricity and piezoelectricity.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Surajit Das, Bhargab P. Mondal, Priya Ranjan, Anuja Datta
Summary: Flexible paper-based thermoelectric generators (PTEGs) have attracted attention due to their advantages, such as flexibility, adaptability, low cost, and easy fabrication process. However, their output performance is still behind other flexible devices. In this article, CTS nanocubes are synthesized and optimized, and a flexible PTEG with a significantly high output power is fabricated. Furthermore, a proof-of-concept field-based demonstration for energy harvesting is shown, corroborating the experimental and theoretical results.
ACS APPLIED MATERIALS & INTERFACES
(2023)