An experimental and theoretical study on soft chemically grown CuS thin film for photosensor application

Huse, Nanasaheb P.; Dive, Avinash S.; Gattu, Ketan P.; Sharma, Ramphal

doi:10.1016/j.mssp.2017.05.010

Cited by 53 publications

(10 citation statements)

References 61 publications

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“…In the wavelength of the optical spectra, a blue shift was not found in comparison with the bulk CuS which has characteristic band gap energy of about 2.2 eV . The determined band gaps are in accordance with the results published in previous papers. − …”

Section: Resultssupporting

confidence: 90%

Sulfur-Mediated Mechanochemical Synthesis of Spherical and Needle-Like Copper Sulfide Nanocrystals with Antibacterial Activity

Shalabayev

Baláž

Daneu

et al. 2019

ACS Sustainable Chem. Eng.

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In the present study, a quick and environmentally friendly approach has been developed for the synthesis of CuS nanocrystals of different shape with antibacterial activity. The process is completed in 5 min. The presence of copper sulfide in the final products was confirmed by XRD, Raman spectroscopy, XPS, and TEM. The morphology of the product is dependent on whether or not the reaction providing sulfur was realized. When sulfur was included, the CuS particles developed an elongated shape with a thickness in the range between 6 and 8 nm and lengths up to 60 nm. It was found that sulfur plays a role of a nucleation agent in this case and then is removed during the washing process. On the other hand, if just precursors for copper sulfide were used, the morphology was spherical and the crystallite size was around 20 nm. Finally, the antibacterial activity of the products was evaluated. The activity was less selective in the case of CuS prepared by the assistance of sulfur.

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Section: Resultssupporting

confidence: 90%

Sulfur-Mediated Mechanochemical Synthesis of Spherical and Needle-Like Copper Sulfide Nanocrystals with Antibacterial Activity

Shalabayev

Baláž

Daneu

et al. 2019

ACS Sustainable Chem. Eng.

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“…Cu x S y is a p-type semiconductor that exists in various stoichiometric ratios. It is known to exhibit a stoichiometry-dependent bandgap that can be tuned from 1.2 to 2.5 eV [ 19 , 20 ]. In comparison to other potential stoichiometric compositions of Cu x S y , the structure of covellite (CuS) is reported to be sulfur-rich, with a higher electrical conductivity and stability of up to 500 °C [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Electrochemical Evaluation of Copper Sulfide Nanoparticles and Their Application for Non-Enzymatic Glucose Detection in Blood Samples

et al. 2023

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Glutathione-capped copper sulfide (CuxSy) nanoparticles with two different average sizes were successfully achieved by using a simple reduction process that involves only changing the reaction temperature. Temperature-induced changes in the size of CuxSy nanoparticles resulted in particles with different optical, morphological, and electrochemical properties. The dependence of electrochemical sensing properties on the sizes of CuxSy nanoparticles was studied by using voltammetric and amperometric techniques. The spherical CuxSy nanoparticles with the average particle size of 25 ± 0.6 nm were found to be highly conductive as compared to CuxSy nanoparticles with the average particle size of 4.5 ± 0.2 nm. The spherical CuxSy nanoparticles exhibited a low bandgap energy (Eg) of 1.87 eV, resulting in superior electrochemical properties and improved electron transfer during glucose detection. The sensor showed a very good electrocatalytic activity toward glucose molecules in the presence of interference species such as uric acid (UA), ascorbic acid (AA), fructose, sodium chloride, and sucrose. These species are often present in low concentrations in the blood. The sensor demonstrated an excellent dynamic linear range between 0.2 to 16 mM, detection limit of 0.2 mM, and sensitivity of 0.013 mA/mM. The applicability of the developed sensor for real field determination of glucose was demonstrated by use of spiked blood samples, which confirmed that the developed sensor had great potential for real analysis of blood glucose levels.

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“…Versatile photosensors must perform reliably, consume little power, allow for large-area installation, and be inexpensive to fabricate. Therefore, many studies of photosensors that satisfy these conditions have been carried out. − …”

Section: Introductionmentioning

confidence: 99%

High Photosensitive Indium–Gallium–Zinc Oxide Thin-Film Phototransistor with a Selenium Capping Layer for Visible-Light Detection

Yoo

Kim

Kang

et al. 2020

ACS Appl. Mater. Interfaces

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Visible light can be detected using an indium–gallium–zinc oxide (IGZO)-based phototransistor, with a selenium capping layer (SCL) that functions as a visible light absorption layer. Selenium (Se) exhibits photoconductive properties as its conductivity increases with illumination. We report an IGZO phototransistor with an SCL (SCL/IGZO phototransistor) that demonstrated optimal photoresponse characteristics when the SCL was 150 nm thick. The SCL/IGZO phototransistor exhibited a photoresponsivity of 1.39 × 103 A/W, photosensitivity of 4.39 × 109, detectivity of 3.44 × 1013 Jones, and external quantum efficiency of 3.52 × 103% when illuminated by green light (532 nm). Ultraviolet–visible spectroscopy and ultraviolet photoelectron spectroscopy analysis showed that Se has a narrow energy band gap, in which visible light is absorbed and forms a p–n junction with IGZO so that photogenerated electron–hole pairs are easily separated, which makes recombination more challenging. We show that electrons generated in the SCL flow through the IGZO layer, which enables the phototransistor to detect visible light. Furthermore, the SCL/IGZO phototransistor exhibited excellent durability and reversibility owing to the constant light and dark current and the time-dependent photoresponse characteristics over 8000 s when a red light (635 nm) source was turned on and off at a frequency of 0.1 Hz.

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An experimental and theoretical study on soft chemically grown CuS thin film for photosensor application

Cited by 53 publications

References 61 publications

Sulfur-Mediated Mechanochemical Synthesis of Spherical and Needle-Like Copper Sulfide Nanocrystals with Antibacterial Activity

Sulfur-Mediated Mechanochemical Synthesis of Spherical and Needle-Like Copper Sulfide Nanocrystals with Antibacterial Activity

Synthesis, Characterization, and Electrochemical Evaluation of Copper Sulfide Nanoparticles and Their Application for Non-Enzymatic Glucose Detection in Blood Samples

High Photosensitive Indium–Gallium–Zinc Oxide Thin-Film Phototransistor with a Selenium Capping Layer for Visible-Light Detection

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