Comparative study of CuO, CuO@Ag and CuO@Ag:La nanoparticles for their photosensing properties

Arya, Sandeep; Prerna,; Singh, Anoop; Kour, Ravinder

doi:10.1088/2053-1591/ab49ab

Cited by 32 publications

(14 citation statements)

References 70 publications

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“…The characteristic peaks appearing around 36.4, 42.3, 43.2, 50.4, 61.4, and 74.1° in the green phase are indexed to (111) of Cu 2 O, (200) of Cu 2 O, (111) of Cu, (200) of Cu, (220) of Cu 2 O, and (220) of Cu, respectively. The XRD peaks located around 32.7, 35.4, 38.6, and 43.2° for brown phase particles are attributed to the (110) of CuO, (002) of CuO, (111) of CuO, and (111) of Cu, respectively. − The black phase is dominated by the presence of Cu (111), reflecting the preferred orientation together with the various crystalline variants of CuO and Cu. However, in the green phase, various crystalline forms of Cu 2 O are observed, but the same crystalline variants of CuO revert in the brown phase.…”

Section: Resultsmentioning

confidence: 99%

Formation of Self-Assembled Nanowires from Copper Nanoparticles Synthesized by the Electro-Explosion of Wires Technique─Study of the Time-Dependent Structural and Functional Evolution

Ghosh Moulick,

Juneja,

Gupta

et al. 2023

ACS Omega

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We report here the formation of Cu nanowires (CuNWs) from Cu nanoparticles (CuNPs) by a self-assembly process. The CuNPs were synthesized by the electro-explosion of wire (EEW) technique that included nonequilibrium processes for the synthesis. Structural evolution in terms of aggregation or nanowire formation in the samples was observed when the CuNPs were kept for a month after synthesis in a glass vial without the application of any external driving force. The emergence of tangled CuNWs was noticed at the bottom of the vials only when no agitation or aeration was allowed. The nanowires were characterized using transmission electron microscopy (TEM) and X-ray diffraction (XRD). Thermal oxidation of the nanowire samples implied that they could convert into rod-shaped structures. Loss of functionality was also observed in the hemoglobin precipitation study conducted to compare the activity of freshly prepared CuNPs and CuNWs. From the above observations, we conclude that the CuNP, after synthesis, possesses a huge amount of energy, and attainment of equilibrium occurs through either aggregation (clustering) or ordered self-assembly, depending on the conditions applied.

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Section: Resultsmentioning

confidence: 99%

Formation of Self-Assembled Nanowires from Copper Nanoparticles Synthesized by the Electro-Explosion of Wires Technique─Study of the Time-Dependent Structural and Functional Evolution

Ghosh Moulick,

Juneja,

Gupta

et al. 2023

ACS Omega

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“…Moreover, Au_CuO_1 shows shifting of O-H stretching vibration and adsorbed water peaks to∼3306 and ∼3448 cm −1 , which appear to be sharper than the other samples. The appearance of sharp and new peaks as well as peaks' shifting are possibly due to the incorporation of Au on the crystal structure of CuO [41]. [42].…”

Section: Optical Diagnostics Of the Plasmamentioning

confidence: 99%

Novel single-step synthesis and shape transformation of Au/CuO micro/nanocomposites using plasma-liquid interaction

2021

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We report a novel single-step synthesis method of metal/metal oxide composites and transformation of the shape of the oxide material by Plasma-Liquid Interaction. Considering the potential applications of noble metal nanoparticle decorated copper oxide composites, we synthesize Au/CuO micro/nanocomposites by generating plasma between two copper electrodes inside a gold precursor (HAuCl4) solution. Simultaneous synthesis of CuO and Au nanoparticles from the electrode material and from the precursor solution respectively is possible due to the interaction of energetic electrons and other active species formed in the plasma zone. Moreover, the process does not require any external stabilizing and reducing chemical agents. The method provides a remarkable tunability of the materials’ physical and chemical properties by only controlling the precursor solution concentration. By controlling process parameters, the shape of CuO particles can be transformed from spindles to sheet-like and the size of Au nanoparticles can also be varied. It influences the particles’ specific surface area and total pore volume. Plasmonic property of Au nanoparticles is also observed i.e. optical tunability can be achieved. The process is found to be effective for synthesis of desired nanomaterials having various energy storage and solar light-driven photocatalytic applications.

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“…The aptamers were deposited on an Au electrode and methylene blue was used as an indicator. The aptasensors can be based on amperometric, potentiometric, voltammetric, conductometric, and impedimetric techniques [ 67 , 68 ]. The voltammetric aptasensors mostly use DPV, CV, and square wave voltammetry (SWV) techniques to detect the antibody.…”

Section: Electrochemical Biosensorsmentioning

confidence: 99%

Recent Advances in Electrochemical Biosensors: Applications, Challenges, and Future Scope

et al. 2021

Self Cite

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The electrochemical biosensors are a class of biosensors which convert biological information such as analyte concentration that is a biological recognition element (biochemical receptor) into current or voltage. Electrochemical biosensors depict propitious diagnostic technology which can detect biomarkers in body fluids such as sweat, blood, feces, or urine. Combinations of suitable immobilization techniques with effective transducers give rise to an efficient biosensor. They have been employed in the food industry, medical sciences, defense, studying plant biology, etc. While sensing complex structures and entities, a large data is obtained, and it becomes difficult to manually interpret all the data. Machine learning helps in interpreting large sensing data. In the case of biosensors, the presence of impurity affects the performance of the sensor and machine learning helps in removing signals obtained from the contaminants to obtain a high sensitivity. In this review, we discuss different types of biosensors along with their applications and the benefits of machine learning. This is followed by a discussion on the challenges, missing gaps in the knowledge, and solutions in the field of electrochemical biosensors. This review aims to serve as a valuable resource for scientists and engineers entering the interdisciplinary field of electrochemical biosensors. Furthermore, this review provides insight into the type of electrochemical biosensors, their applications, the importance of machine learning (ML) in biosensing, and challenges and future outlook.

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Comparative study of CuO, CuO@Ag and CuO@Ag:La nanoparticles for their photosensing properties

Cited by 32 publications

References 70 publications

Formation of Self-Assembled Nanowires from Copper Nanoparticles Synthesized by the Electro-Explosion of Wires Technique─Study of the Time-Dependent Structural and Functional Evolution

Formation of Self-Assembled Nanowires from Copper Nanoparticles Synthesized by the Electro-Explosion of Wires Technique─Study of the Time-Dependent Structural and Functional Evolution

Novel single-step synthesis and shape transformation of Au/CuO micro/nanocomposites using plasma-liquid interaction

Recent Advances in Electrochemical Biosensors: Applications, Challenges, and Future Scope

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