B. K. Patel
Bio: B. K. Patel is an academic researcher. The author has contributed to research in topics: Equivalent series resistance & Schottky barrier. The author has an hindex of 1, co-authored 1 publications receiving 29 citations.
TL;DR: In this article, a Schottky junction in the configuration ITO/nano-CdS/Au has been fabricated and the current(I) −voltage(V) and capacitance(C)−voltage (V) characteristics studied.
Abstract: A Schottky junction in the configuration ITO/nano-CdS/Au has been fabricated and the current(I)–voltage(V) and capacitance(C)–voltage(V) characteristics studied. The I–V studies show series resistance effect resulting in two ideality factors: one in low and the other in high forward bias regime, suggesting the presence of surface/interface traps in nano-CdS. Frequency dependent capacitance has also been studied and different semiconductor parameters have been estimated from the I–V and C–V analysis.
TL;DR: These structure-property-function (SPF) and structure- property-hazard (SPH) relationships are established for nano-cupric oxide (n-CuO) as a function of shape, including nanospheres and nanosheets, and correlations between CuO surface reactivity and bacterial toxicity are revealed.
Abstract: Shape of engineered nanomaterials (ENMs) can be used as a design handle to achieve controlled manipulation of physicochemical properties. This tailored material property approach necessitates the establishment of relationships between specific ENM properties that result from such manipulations (e.g., surface area, reactivity, or charge) and the observed trend in behavior, from both a functional performance and hazard perspective. In this study, these structure–property-function (SPF) and structure–property-hazard (SPH) relationships are established for nano-cupric oxide (n-CuO) as a function of shape, including nanospheres and nanosheets. In addition to comparing these shapes at the nanoscale, bulk CuO is studied to compare across length scales. The results from comprehensive material characterization revealed correlations between CuO surface reactivity and bacterial toxicity with CuO nanosheets having the highest surface reactivity, electrochemical activity, and antimicrobial activity. While less active ...
TL;DR: The result signifies that the DNA acts both as a reducing agent as well as nonspecific capping agent for the Pd nanowire synthesis, indicating that Pdnanowires may be valuable as interconnections in nanoscale integrated circuitry, functional nanodevices and in optoelectronics.
Abstract: A photochemical method has been exploited for the very fast synthesis of electrically conductive Pd nanowires on DNA. The nanowires have an average diameter of 55−75 nm and a length of ∼3−5 μm. Our...
TL;DR: In this article, the fabrication and performance of room temperature operated liquefied petroleum gas (LPG) sensor based on polypyrrole/TiO 2 heterojunction was reported.
Abstract: In this paper, we report on the fabrication and performance of room temperature operated liquefied petroleum gas (LPG) sensor based on polypyrrole/TiO 2 (Ppy/TiO 2 ) heterojunction. Ppy/TiO 2 heterojunction was prepared by sequencial depositing TiO 2 film by chemical bath deposition and Ppy film by electrodeposition method. Ppy and TiO 2 films were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), FTIR and thermo-emf techniques. The XRD study revealed amorphous and nanocrystalline natures for Ppy and TiO 2 films, respectively. The SEMs of Ppy and TiO 2 films showed cauliflower-like and densely compact morphologies respectively. Maximum gas response of 55% was observed for Ppy/TiO 2 heterojunction at 1040 ppm of LPG. Relative humidity affected the gas sensing performance of heterojunction. Good stability, fast response and recovery times indicate that Ppy/TiO 2 heterojunction is a one of the candidate for room temperature LPG detection.
TL;DR: In this paper, the absorbance spectrum of an electrode modified with a submonolayer of cadmium sulfide nanoparticles was studied and it was shown that absorbance is potential dependent; a near band-edge bleaching is reported at negative potentials.
Abstract: This paper is concerned with studies of the absorbance spectrum of an electrode modified with a submonolayer of cadmium sulfide nanoparticles. It is shown that the absorbance is potential dependent; a near band-edge bleaching is reported at negative potentials. The bleaching closely resembles that reported in radiolysis and nonlinear optical studies of CdS nanoparticles. Photocurrent investigations performed in conjunction with these absorbance studies indicate that the bleaching occurs only when electrons are injected into the conduction band of the nanoparticles and that charge transfer to surface states does not affect the absorption. The significance of the results is discussed with reference to the various models of absorbance bleaching in semiconductor nanoparticles.