Article
Materials Science, Multidisciplinary
Amarjyoti Kalita
Summary: Co and Cu doped ZnO nanocrystals with controlled crystallite size were successfully synthesized. The formation of hexagonal wurtzite phase was confirmed by Rietveld refinement of X-ray diffraction patterns. The presence of E2high mode indicated the unchanged phase and good crystalline nature of the nanocrystals. Photoluminescence spectra of Co and Cu doped ZnO nanocrystals were related to defect states based on zinc and oxygen. The quenching of PL intensity was attributed to the incorporation of Co and Cu in ZnO nanocrystals. ESR results supported the decrease in ferromagnetic order measured by VSM in both Co and Cu doped ZnO nanocrystals. The superior photocatalytic activity of Cu doped ZnO nanocrystals could be attributed to the higher electron trapping capability of Cu2+ ions.
CURRENT APPLIED PHYSICS
(2023)
Article
Materials Science, Ceramics
Anu Katiyar, Nishant Kumar, R. K. Shukla, Anchal Srivastava
Summary: This study synthesized undoped, doped, and co-doped vertically aligned zinc oxide nanorods (NRs) using a sonicated sol-gel immersion method and investigated the structural, morphological, optical, and photoconductivity properties of NRs with different dopants. The results showed that the incorporation of Fe improved the growth of NRs, while the incorporation of Ag had a detrimental effect. Co-doping enhanced the light harvesting efficiency and reduced the persistent photoconductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Hakan Colak, Ercan Karakose
Summary: The study demonstrated that Gd(III)-doped ZnO nanorods show increased response to CO2 gas with higher doping concentration and temperature, with the optimum operating temperature determined as 200 degrees C. The 3 mol % doped sample exhibited a high sensitivity to CO2 gas, with a response rate of about 85% at this temperature, and maintained response stability against CO2, acetone, and ethanol gases for 30 days.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Sulaiman S. A. Al Ghafry, Mohammed Z. Al-Abri, Basim Al Farsi, Faisal Al Marzouqi, Lamia M. Al Farsi, Nur Adilah Roslan, Azzuliani Supangat
Summary: This study successfully synthesized pristine and gallium doped ZnO nanorods using rapid microwave-assisted method, and investigated the effects of different doping levels. The results showed significant changes in the morphology, crystalline size, and surface roughness of the nanorods with Ga doping. The 1% Ga doping sample exhibited significant enhancement in visible light absorption and rapid degradation.
Article
Engineering, Electrical & Electronic
Onur Alev, Imren Erguen, Okan Oezdemir, Leyla Colakerol Arslan, Serkan Bueyuekkoese, Zafer Ziya Ozturk
Summary: Cu-doped ZnO nanorods showed enhanced sensor response towards ethanol and allowed operation at lower temperatures compared to pristine ZnO nanorods, with 2% and 3% Cu-doped sensors exhibiting selective behavior towards ethanol.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
M. Buryi, Z. Remes, V Babin, A. Artemenko, V. Vanecek, K. Aubrechtova Dragounova, L. Landova, R. Kucerkova, J. Micova
Summary: In this study, Erbium-doped zinc oxide powder was synthesized through hydrothermal growth, with observed changes in morphology and luminescence properties. Annealing in air at elevated temperatures led to modifications in defect states and luminescence properties, as well as the appearance of Er3+ infrared photoemission characteristics. EPR signals of Er3+ weakened and disappeared at around 500 degrees C, while XPS and IR Raman spectroscopy indicated diffusion of Zn and oxidation of Er to Er3+ forms during annealing.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Sulaiman S. A. Al Ghafry, Hamood Al Shidhani, Basim Al Farsi, R. G. Sumesh Sofin, Abdullah S. Al-Hosni, Zahra Alsharji, Jamal Al-Sabahi, Mohammed Z. Al-Abri
Summary: The contamination of water resources is a major environmental concern, especially the presence of hazardous pollutants such as phenol. Therefore, developing cost-effective techniques to remove phenol from water is crucial. This study investigated the use of silver-doped zinc oxide nanorods (Ag-ZnO NRs) for the degradation of phenol under sunlight. The synthesized Ag-ZnO NRs exhibited two distinct structures, hexagonal and cubic, and their optical properties showed significant improvement due to silver doping. The 0.5% Ag-doped ZnO NRs showed the highest photocatalytic activity, achieving a degradation rate of 98.5% for phenol removal under solar light irradiation after 5 hours.
Article
Chemistry, Multidisciplinary
Fatemah. H. Alkallas, Amira Ben Gouider Trabelsi, Ramzi Nasser, Susana Fernandez, Ji-Ming Song, Habib Elhouichet
Summary: Chromium-doped zinc oxide nanorods were prepared and their structural, morphological, and optical properties were studied. The doped nanorods showed efficient photocatalytic degradation of methyl orange under UV-vis light illumination.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Hamideh Hajighasemi, Hosein Eshghi
Summary: Undoped and doped (Co, Cu, N) ZnO nanorods were synthesized using the chemical bath deposition method and their UV sensitivity in the metal-semiconductor-metal configuration was compared. The results showed that the addition of dopants led to n-type conductivity, with different activation energies for different dopants. The doped nanorods exhibited improved crystallinity, higher UV absorbance and the ZnO:Co nanorods showed the highest photoresponse ratio.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Rajwali Khan, Ihab Shigidi, Sattam Al Otaibi, Khaled Althubeiti, Sherzod Shukhratovich Abdullaev, Nasir Rahman, Mohammad Sohail, Alamzeb Khan, Shahid Iqbal, Tommaso Del Rosso, Quaid Zaman, Aurangzeb Khan
Summary: In this study, the co-precipitation approach was used to synthesize ZnO, Zn0.96Gd0.04O, and Zn0.96-xGd0.04CoxO nanotubes. The effects of gadolinium and cobalt doping on the microstructure, morphology, and optical characteristics of ZnO were investigated. It was found that gadolinium and cobalt doping did not affect the morphology of the nanotubes, but reduced the crystallinity of the samples. The doping also resulted in changes in the optical characteristics and electrical conductivity of the nanotubes.
Article
Materials Science, Multidisciplinary
Jian-Min Zhang, Jin-Peng Duan, Yu-Hong Huang, Xiu-Mei Wei
Summary: The effects of Tc, Ru, Rh, and Cd substitution doping on blue phosphorene monolayer were systematically investigated. Tc and Cd doping led to magnetic half-metal properties usable in spintronics, Ru doping resulted in a magnetic semiconductor, while Rh doping did not change the nonmagnetic semiconductor nature of the material. The 4d transition metal substitution-doped blue phosphorene monolayers showed enhanced absorption for visible and infrared lights.
Article
Engineering, Electrical & Electronic
S. Vinoth, A. M. S. Arulanantham, S. Saravanakumar, R. S. Rimal Isaac, N. Soundaram, N. Chidhambaram, Devarajan Alagarasan, S. Varadharajaperumal, Mohd. Shkir, S. AlFaify
Summary: Cobalt-doped ZnO thin films synthesized using chemical bath deposition show excellent UV photosensing properties, with nanowire morphology and hexagonal wurtzite crystal structure. Due to the replacement of Co2+ ions, an increase in crystallite size and decrease in bandgap was observed, leading to high photoabsorption capability, with the highest responsivity reaching 0.918 AW(-1).
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Hajer Saadi, Zohra Benzarti, Pedro Sanguino, Joao Pina, Najmeddine Abdelmoula, Joao Sergio Seixas de Melo
Summary: The undoped and Co-doped ZnO nanopowders were synthesized effectively using the chemical co-precipitation process. Various experimental techniques were used to characterize the crystal structure, morphology, vibrational, optical, and dielectric properties of the prepared samples. The study focused on the impact of cobalt doping on the different characteristics of ZnO nanopowders. The results showed that cobalt doping affected the structural, optical, and morphological properties, as well as the dielectric constant and electrical conductivity of the ZnO nanopowders.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Jiang Wu, Kanghui Ke, Ni Qin, Enzhu Lin, Zihan Kang, Dinghua Bao
Summary: In this study, a magnetically retrievable Fe3O4@SiO2@ZnO nanocomposite was successfully synthesized, which consisted of vertically grown ZnO nanorods on the surface of magnetic Fe3O4@SiO2 microspheres. SiO2 served as an insulator to protect the core and inhibit charge transfer. The nanocomposite showed high efficiencies in piezocatalytic, photocatalytic, and piezo-photocatalytic dye degradation processes, with a rate constant of piezo-photocatalysis reaching 95.9 x 10-3 min-1.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Ali Can Guler, Jan Antos, Milan Masar, Michal Urbanek, Michal Machovsky, Ivo Kuritka
Summary: This research focuses on band bending modification of metal/semiconductor hybrid nanostructures using low-cost and effective designs in photoelectrochemical (PEC) water splitting. The introduction of gradient doping of Au nanoparticles (NPs) into ZnO nanorods (NRs) through thermal treatment enhanced the transport of photo-induced charge carriers and resulted in improved photocurrent density. The study also analyzed the plasmonic effects of Au NPs which contributed to the enhanced photoresponse of the Au-doped ZnO NRs. Overall, this research provides an economical and facile strategy for preparing noble NP-incorporated semiconductor NRs with potential applications in energy conversion and storage technologies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
S. Chowki, S. Rayaprol, A. Mukhopadhyay, N. Mohapatra
Article
Nanoscience & Nanotechnology
Tathamay Basu, Niharika Mohapatra, Kiran Singh, E. V. Sampathkumaran
Article
Materials Science, Multidisciplinary
Priyanka Sahu, Satya Narayan Tripathy, Ranjit Pattanayak, Rakesh Muduli, Niharika Mohapatra, Simanchala Panigrahi
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2017)
Article
Materials Science, Multidisciplinary
S. N. Bhatia, Niharika Mohapatra
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2016)
Article
Physics, Condensed Matter
S. Chowki, R. Kumar, N. Mohapatra, A. V. Mahajan
JOURNAL OF PHYSICS-CONDENSED MATTER
(2016)
Article
Chemistry, Physical
A. Mukhopadhyay, N. Lakshminarasimhan, N. Mohapatra
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Physics, Applied
S. R. Mohapatra, P. N. Vishwakarma, S. D. Kaushik, R. J. Choudhary, N. Mohapatra, A. K. Singh
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Physics, Applied
Ganesh Bera, V. R. Reddy, P. Rambabu, P. Mal, Pradip Das, N. Mohapatra, G. Padmaja, G. R. Turpu
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
S. N. Bhatia, Niharika Mohapatra
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2017)
Article
Physics, Applied
A. Mukhopadhyay, N. Lakshminarasimhan, N. Mohapatra
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2018)
Article
Multidisciplinary Sciences
O. Halder, B. Satpati, P. Rajput, N. Mohapatra, S. N. Jha, J. Suffczynski, W. Pacuski, S. Rath
SCIENTIFIC REPORTS
(2019)
Article
Chemistry, Physical
A. Mukhopadhyay, N. Lakshminarasimhan, N. Mohapatra
Proceedings Paper
Physics, Condensed Matter
A. Mukhopadhyay, N. Mohapatra
62ND DAE SOLID STATE PHYSICS SYMPOSIUM
(2018)
Proceedings Paper
Physics, Applied
A. Mukhopadhyay, S. Chowki, N. Mohapatra
DAE SOLID STATE PHYSICS SYMPOSIUM 2015
(2016)
Proceedings Paper
Physics, Applied
S. Chowki, B. Sahu, A. K. Singh, N. Mohapatra
DAE SOLID STATE PHYSICS SYMPOSIUM 2015
(2016)
