Surface modification of aligned CdO nanosheets and their enhanced field emission properties

Bagal, Vivekanand S.; Patil, Girish P.; Deore, Amol B.; Suryawanshi, Sachin R.; Late, Dattatray J.; More, Mahendra A.; Chavan, Padmakar G.

doi:10.1039/c5ra28000a

Cited by 22 publications

(5 citation statements)

References 36 publications

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“…The intensity ratio of the (200) and (111) diffraction peaks of the Au NPs was 1:3, suggesting that the (111) plane was the predominant orientation that was also confirmed by the HR-TEM image (Figure A inset). The crystalline nature of the Au NPs with a fringe spacing of 0.244 nm was very close to the (111) plane . With decreased concentrations of ACP (0.01 mU mL –1 ), the size of the formed Au NPs increased because of aggregation.…”

Section: Resultsmentioning

confidence: 86%

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In Situ Enzymatic Generation of Gold Nanoparticles for Nanozymatic Label-free Detection of Acid Phosphatase

Ahmed

Chen

2020

ACS Appl. Nano Mater.

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Pronounced changes of acid phosphatase (ACP) in the human body may occur because of several diseases. Unusual ACP expressions might be diagnostically useful as serological and histological biomarkers for specific conditions and for investigations into the pathophysiology of their associated diseases. Recently, artificial enzyme-based colorimetric detection has garnered increased research interest because of its practicability, cost-effectiveness, and flexibility in use. Herein, for the first time, a label-free sensitive visual detection of ACP is proposed based on a signal transduction strategy in conjunction with an enzyme cascade reaction and the nanozymatic activity of the in situ synthesized gold nanoparticles (Au NPs). The ACP-catalyzed hydrolysis of L-ascorbic acid 2-phosphate sesquimagnesium (AAPS) generates ascorbic acid (AA), which in turn reacts with HAuCl 4 to generate Au NPs. The nonenzymatic activity of the synthesized Au NPs toward 3,3′,5,5′-tetramethylbenzidine (TMB) and H 2 O 2 produces a visual readout color that may be utilized to effectively determine ACP concentrations in biological media. The terephthalic acid test confirmed that the size of the Au NPs played a significant role in the nonenzymatic reaction. The quantitative sensing of ACP activity over a wide linear range (0.01−50 mU mL −1 ) with a detection limit of 0.03 mU mL −1 was realized, which endowed the proposed method with high sensitivity for potential real-life applications. Moreover, the present detection approach demonstrated higher sensitivity than a commercially available ACP kit. The approach reported in this study opens a prospect for label-free amplified colorimetric assays of enzymes and biomarkers.

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Section: Resultsmentioning

confidence: 86%

“…The crystalline nature of the Au NPs with a fringe spacing of 0.244 nm was very close to the (111) plane. 56 With decreased concentrations of ACP (0.01 mU mL −1 ), the size of the formed Au NPs increased because of aggregation. As seen from the TEM image (Figure 1C), the NP distribution was not uniform.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

In Situ Enzymatic Generation of Gold Nanoparticles for Nanozymatic Label-free Detection of Acid Phosphatase

Ahmed

Chen

2020

ACS Appl. Nano Mater.

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“…As for the CdO/p-Si contact, the silicon and CdO electron affinities are 4.05 eV and 3.45 eV, respectively. Therefore, the Schottky barrier occurs at the CdO/p-Si junction (Bagal et al, 2016;Soylu et al, 2012). The values shown in Table 1 shows the correlation between the barrier height and the ideality factor.…”

Section: Resultsmentioning

confidence: 96%

Electrical Characterization of CdO Based Au/p-Si Rectifier

Yılmaz

2021

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Cadmium oxide (CdO) film was developed using a chemical spray pyrolysis technique on the p-type silicon (p-Si) substrate. The solution of the CdO was obtained by dissolving cadmium acetate salt in a mixture of distilled water and methanol. High-quality Au and Al contacts were evaporated on the polished and unpolished side of p-Si, respectively to create 4Au/CdO/p-Si/Al device architecture. In this context, four Au/CdO/p-Si/Al devices that were arbitrarily favored were analyzed and compared in depth. Current-Voltage (I-V) measurements were carried out to find out the performance of the CdO interlayer in the Au/p-Si device. The obtained data were analyzed using the Thermionic emission theory, Norde, and Cheung approach. Results indicated that CdO films grown by simple chemical spray pyrolysis technique could be used as barrier modifiers in Au/p-Si rectifier device.

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“…The features of the CdO substrates and the wide range of applications of InSe motivated us to bring these two materials together to form a heterojunction device. As the work function (qf) of CdO being 3.45 eV 6 is less than the work function of Au (5.34 eV), the Au/p-CdO form an ohmic interface. Similarly the ohmic contact to n-InSe layer is achieved by using ytterbium ( ) pads.…”

Section: Introductionmentioning

confidence: 99%

“…As thin film transistors InSe processes high gain and short response time which make it attractive for the fabrication of photodetectors and micro-light emitting diode displays 5 . In 2 Se 3 is also used in the fabrication of nonvolatile memory devices 6 . α-In 2 Se 3 /WSe 2 vertical heterojunction devices are mentioned exhibiting switchable diode characteristics and nonvolatile memory phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of CdO/In6Se7 Thin Film Transistors

Qasrawi

Algarni

2020

Mat. Res.

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In this study, the design and characterization of CdO/InSe thin film transistors (TFT) that are grown onto Au substrates are investigated. The devices are also subjected to a vacuum annealing process at 300 o C to enhance the structure and electrical performance. It was observed that the growth of polycrystalline monoclinic In 6 Se 7 phase of InSe is preferred at this annealing temperature when coated onto Au/CdO substrates. Electrically, noisy negative capacitance effect accompanied with resonance-antiresonance phenomena is observed in the capacitance spectra of the as prepared TFT devices. The annealing of the TFT devices reduced the noise in the capacitance, conductance, impedance, and reflection coefficient and return loss spectral responses. The heat treated TFT devices displayed low bandpass, high bandpass and bandstop filter characteristics in the studied frequency domain (0.01-1.80 GHz) indicating the applicability of these devices as radio wave-microwave resonators.

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Surface modification of aligned CdO nanosheets and their enhanced field emission properties

Abstract: Porous aligned CdO nanosheets were grown by simple and cost effective method of thermal annealing. These nanosheets were decorated with Au nanoparticles, and the field emission properties of the Au-decorated aligned CdO nanosheets were enhanced.

Cited by 22 publications

References 36 publications

In Situ Enzymatic Generation of Gold Nanoparticles for Nanozymatic Label-free Detection of Acid Phosphatase

In Situ Enzymatic Generation of Gold Nanoparticles for Nanozymatic Label-free Detection of Acid Phosphatase

Electrical Characterization of CdO Based Au/p-Si Rectifier

Preparation and Characterization of CdO/In6Se7 Thin Film Transistors

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