Synthesis and characterizations of Ag-doped CdO nanoparticles for P-N junction diode application

Mohanraj, K.; Balasubramanian, D.; Chandrasekaran, J.; Bose, A. Chandra

doi:10.1016/j.mssp.2018.02.006

Cited by 51 publications

(17 citation statements)

References 53 publications

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“…In comparison to the electroreduction peak at −1.12 V of Ag/ ZnO NPs, Ag/CdO NPs exhibited more positive reduction potentials due to the smaller energy gap of CdO NPs (2.26 eV) than ZnO NPs (3.24 eV). 36,37 Ag/CdO NPs also showed a higher electroreduction signal, which was 1.37 times that of Ag/ZnO NPs. The highest reduction currents and positive reduction potentials enabled Ag/CdO NPs to be an alternative electroactive nanobeacon for the sensitive detection of PSA.…”

Section: Resultsmentioning

confidence: 93%

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Zhao

Cui

Sun

et al. 2018

ACS Appl. Mater. Interfaces

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A simple magnetic electrochemical aptasensor was established for the detection of prostatic specific antigen (PSA). Ag/CdO nanoparticles (NPs) were fabricated and exhibited strong electroreduction peaks at −1.07 V, attributing to the electron transfer from Cd2+ to Cd0 and the superior electron transportation of Ag. Aptamer-modified Ag/CdO NPs were assembled on the surface of superparamagnetic Fe3O4/graphene oxide nanosheets (GO/Fe3O4 NSs) through the hydrophobic and π–π stacking interaction of aptamers and GO NSs. These assemblies possessed superior electroactive properties, efficient electron transfer, and superparamagnetic response and could serve as sensing units for PSA detection with the aid of a magnetic electrode. With increasing concentrations of PSA, the high affinity of aptamers to PSA enabled the dissociation of Ag/CdO NPs from GO/Fe3O4 NSs, decreasing the intensity of electroreduction peaks. The Ag/CdO NP-engineered magnetic electrochemical aptasensor achieved sensitive and accurate detection of PSA in the range of 50 pg/mL to 50 ng/mL. The limit of detection (LOD) was as low as 28 pg/mL. This developed protocol can be extended to a large set of strong electroactive labels for reliable tumor biomarker detection with high sensitivity and specificity.

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Section: Resultsmentioning

confidence: 93%

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Zhao

Cui

Sun

et al. 2018

ACS Appl. Mater. Interfaces

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“…The graph shows a high dielectric constant value at the lower frequency region, and at a higher frequency range, the dielectric constant becomes a constant value. 42,43 The observed pattern clearly shows that the dielectric properties of the compound decreases with increase in the average particle size of the system. The values of the dielectric loss and dielectric constant of the samples are listed in Table 2.…”

Section: Resultsmentioning

confidence: 88%

Sol–Gel Synthesis of Ce_4–xSr_1+xFe_5–xZn_xO_14+δ [0 ≤ x ≤ 0.45] Superparamagnetic Oxide Systems and Its Magnetic, Dielectric, and Drug Delivery Properties

et al. 2018

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In this work, we have successfully synthesized superparamagnetic nanocomposites, Ce 4– x Sr 1+ x Fe 5– x Zn x O 14+δ (0 ≤ x ≤ 0.45) (CSFZ) (TA1–TA4: x = 0, 0.15, 0.30, and 0.45) via the Nitrate–citrate sol–gel method. X-ray diffraction studies show the formation of single-phase nanocomposites (NCs) and the average crystallite size is found to be 18 nm. Energy-dispersive X-ray spectroscopy analysis supports the formation of the desired product with the expected composition. The scanning electron microscopy image shows that the prepared samples are in spherical shape and highly porous in nature. Most of the particle sizes present in the image are in the range of 5–20 nm. The optical studies show an intense peak at 583 nm corresponding to the instantaneous existence of both Fe 2+ and Fe 3+ intervalence electronic charge transition bands. X-ray photoelectron spectra analysis confirms the presence of elements with their preferred oxidation state. The superparamagnetic nature of the prepared sample was confirmed by vibrating sample magnetometer analysis. Synthesized materials show a low saturate magnetic moment ranging from 0.3400 to 0.1075 emu/g. The coercivity and retentivity value of the synthesized NC is zero. The NCs show high encapsulation efficiency toward ciprofloxacin hydrochloride because of their unique structure and release the loaded drug molecules in a sustained manner up to 10 h at pH 7.4. Such NCs have high potential for use as multifunctional material in various fields such as optical properties, conductivity studies, dielectric, sensor, and drug delivery properties.

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“…Initially, the n-Si wafer was cleaned artificially to keep away from the nearness of polluting influences. The piranha arrangement (H2SO4:H2O2 =3:1) was set up for taking out the polluting influences out of the wafer and diluted HF (HF: H2O=1:10) was set up for expelling the native oxides on the Si surface, followed by rinsing in double-distilled water after each washing procedure before finally placing it on the substrate holder of JNSP arrangement [26,27]. The 0.1 M copper chloride solution was sprayed on the n-Si wafer at 600 ˚C.…”

Section: P-cuo/n-si Diode Fabricationmentioning

confidence: 99%

Impact of Substrate Temperature on Structural, Electric and Optical Characteristics of CuO Thin Films Grown by JNS Pyrolysis Technique

Jhansi¹,

Balasubramanian²,

Chang

et al. 2022

Silicon

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JNS pyrolysis route has been successfully employed to grow CuO thin films at various substrate temperature, ranging from 300 to 600˚C. The XRD analyses revealed the monoclinic phased polycrystalline growth of the samples and exhibited the strong influence of the substrate temperature (ST) on the crystallite sizes. Optical transmission and bandgap studies also showed that sample bandgaps clearly rely upon the growth temperatures. The SEM micrographs displayed the agglomerated growth of particles having golf ball-like structures. The occurrence of Cu and O in the samples were confirmed through EDS analyses. The studies on DC electrical conductivities also shows strong dependency on the ST. A p-CuO/n-Si diode was fabricated at the ST of 600˚C and the diode parameters like barrier height (𝜙 𝑏 ) and ideality factor (n) were determined under light and dark conditions.

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Synthesis and characterizations of Ag-doped CdO nanoparticles for P-N junction diode application

Cited by 51 publications

References 53 publications

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Sol–Gel Synthesis of Ce_4–xSr_1+xFe_5–xZn_xO_14+δ [0 ≤ x ≤ 0.45] Superparamagnetic Oxide Systems and Its Magnetic, Dielectric, and Drug Delivery Properties

Impact of Substrate Temperature on Structural, Electric and Optical Characteristics of CuO Thin Films Grown by JNS Pyrolysis Technique

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Synthesis and characterizations of Ag-doped CdO nanoparticles for P-N junction diode application

Cited by 51 publications

References 53 publications

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Ag/CdO NP-Engineered Magnetic Electrochemical Aptasensor for Prostatic Specific Antigen Detection

Sol–Gel Synthesis of Ce4–xSr1+xFe5–xZnxO14+δ [0 ≤ x ≤ 0.45] Superparamagnetic Oxide Systems and Its Magnetic, Dielectric, and Drug Delivery Properties

Impact of Substrate Temperature on Structural, Electric and Optical Characteristics of CuO Thin Films Grown by JNS Pyrolysis Technique

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Sol–Gel Synthesis of Ce_4–xSr_1+xFe_5–xZn_xO_14+δ [0 ≤ x ≤ 0.45] Superparamagnetic Oxide Systems and Its Magnetic, Dielectric, and Drug Delivery Properties