Indian Institute of Technology Indore

About: Indian Institute of Technology Indore is a education organization based out in Indore, Madhya Pradesh, India. It is known for research contribution in the topics: Computer science & Chemistry. The organization has 1606 authors who have published 4803 publications receiving 66500 citations.

P-type conduction from Sb-doped ZnO thin films grown by dual ion beam sputtering in the absence of oxygen ambient

Abstract: Sb-doped ZnO (SZO) thin films were deposited on c-plane sapphire substrates by dual ion beam sputtering deposition system in the absence of oxygen ambient. The electrical, structural, morphological, and elemental properties of SZO thin films were studied for films grown at different substrate temperatures ranging from 200 °C to 600 °C and then annealed in situ at 800 °C under vacuum (pressure ∼5 × 10−8 mbar). Films grown for temperature range of 200–500 °C showed p-type conduction with hole concentration of 1.374 × 1016 to 5.538 × 1016 cm−3, resistivity of 66.733–12.758 Ω cm, and carrier mobility of 4.964–8.846 cm2 V−1 s−1 at room temperature. However, the film grown at 600 °C showed n-type behavior. Additionally, current-voltage (I–V) characteristic of p-ZnO/n-Si heterojunction showed a diode-like behavior, and that further confirmed the p-type conduction in ZnO by Sb doping. X-ray diffraction measurements showed that all SZO films had (002) preferred crystal orientation. X-ray photoelectron spectroscopy...

A New Approach for the Mitigating of Flow Maldistribution in Parallel Microchannel Heat Sink

Abstract: The problem of flow maldistribution is very critical in microchannel heat sinks (MCHS). It induces temperature nonuniformity, which may ultimately lead to the breakdown of associated system. In the present communication, a novel approach for the mitigation of flow maldistribution problem in parallel MCHS has been proposed using variable width microchannels. Numerical simulation of copper made parallel MCHS consisting of 25 channels has been carried out for the conventional design (CD) and the proposed design (PD). It is observed that the PD reduces flow maldistribution by 93.7%, which facilitated in effective uniform cooling across the entire projected area of MCHS. Temperature fluctuation at fluid–solid interface is reduced by 4.3 C, whereas maximum and average temperatures of microchannels projected area are reduced by 2.3 C and 1.1 C, respectively. PD is suitable in alleviating flow maldistribution problem for the extended range of off design conditions.

Device Design and Estimated Performance for p-Type Junctionless Transistors on Bulk Germanium Substrates

Abstract: The junctionless nanowire transistor (JNT) has recently been demonstrated to be a promising device for sub-20-nm nodes. So far, most devices were made on semiconductor-on-insulator substrates. The aim of this work is to evaluate the concept of multigate germanium (Ge) JNTs on bulk substrates, using a dedicated modeling methodology. The variation of device performance due to geometry, channel, and substrate doping concentrations is discussed and proposed as a guideline for designing p-type Ge bulk JNTs. This work shows that a potential barrier is formed in the substrate by the p-n junction that isolates the channel from the substrate, and an effective confinement of current in the nanowire can be achieved. The Ge bulk JNT facilitates excellent scalability. Our modeling predicts that, for a gate length of 16 nm, a subthreshold slope of 77 mV/dec and a drain-induced barrier lowering of 70 mV can be obtained with an $I_{\rm on}/I_{\rm off}$ current ratio of $\hbox{1.1} \times \hbox{10}^{5}$ .

Investigation of various gram-positive bacteria for MICP in Narmada Sand, India

Abstract: In lieu of the conventional carbon-intensive and expensive cement-based ground improvement methods, microbially induced calcite precipitation (MICP) method has gained prominence recently as a susta...

Reversible mechanochromism in dipyridylamine-substituted unsymmetrical benzothiadiazoles

Abstract: We report the design and synthesis of push–pull benzothiadiazoles (BTDs) of type D1–π–A–π–D2 and D1–π–A–D2. These BTDs show strong charge transfer interaction. BTD 3 shows reversible mechanochromism with color contrast between yellow (crystalline state) and orange (amorphous state). Photophysical and computational studies reveal that the planar orientation of the pyridyl and BTD unit in 2 results in no change in solid state emission whereas non-planar orientation of the dipyridylamine and BTD unit in 3 results in efficient mechanochromism.