Papers by Author: Juti Rani Deka

Abstract: One-dimensional (1D) nanostructure such as nanowires (NWs), nanobelts and nanorods have attracted tremendous attention in recent years due to their exceptional micro-structural properties and novel potential applications. In the present investigation, titania (TiO2) nanowires are synthesized by microwave hydrothermal process (MHP) treating TiO2 nano powder with NaOH inside a microwave oven for 5h at 210°C and 350W. The mechanical properties of as synthesized TiO2 nanowires are determined by bending it with a nanomanipulator inside a scanning electron microscope (SEM). Young’s moduli of the nanowires are measured to be approximately 11.870.923GPa.

Abstract: With rapid expansion of nanotechnology, microminiaturization has become imperative in the field of micro/nano fabrication. A nanomanipulation system with high degrees of freedom that can perform nanomachining, nanofabrication and mechanical/electrical characterization of nanoscale objects inside a scanning electron microscope (SEM) is presented. The manipulation system consists of several individual operating units each having three linear stages and one rotational stage. The body of the manipulator is designed using the idea of superposition. Each operating unit can move in the permissible range of SEM’s vacuum chamber and can increase or decrease the number of units according to the requirement. Experiments were executed to investigate the in-situ electrical resistance of nano materials.

Abstract: Nanostructures materials have stimulated broad attention in the past decade because of their potential fundamental characteristics and its promising applications in nano electronic devices. In the present investigation, crystalline boron nanowires (BNWs) were synthesized by vapor liquid solid (VLS) technique and its mechanical properties were studied using a nanomanipulator inside a scanning electron microscope (SEM). Electron beam induced deposition (EBID) method was used to clamp boron nanowire to the AFM tips. The Young’s modulus of the NWs were determined from the buckling instability of NW and computed to be approximately 131.7 ± 14.6GPa. In addition, the nanomanipulation system was used to manipulate nanowire and built a nanoring.