Debjyoti Banerjee

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In this study, we report the anomalous enhancement of specific heat capacity of high-temperature nano-fluids. Alkali metal chloride salt eutectics were doped with silica nanoparticles at 1% mass concentration. The specific heat capacity of the nanofluid was enhanced by 14.5%. Dispersion behavior of the nanopar-ticles in the eutectic was confirmed by(More)
The UV spectral lines formed at transition region temperatures in the solar atmosphere, show a prevailing red-shifted emission. Using the Solar Ultraviolet Measurements of Emitted Radiation spectrometer flown on the Solar and He-liospheric Observatory spacecraft, we measure the amount of line shift as a function of the temperature for several spectral lines(More)
In this paper, a comprehensive approach to numerical and experimental analysis of microchamber filling in centrifugal microfluidics is presented. In the development of micro total analysis systems, it is often necessary to achieve complete, uniform filling of relatively large microchambers, such as those needed for nucleic acid amplification or detection.(More)
Pool boiling experiments were conducted with three horizontal, flat, silicon surfaces, two of which were coated with vertically aligned multiwalled carbon nanotubes (MWCNTs). The two wafers were coated with MWCNT of two different thicknesses: 9 ␮m (Type-A) and 25 ␮m (Type-B). Experiments were conducted for the nucleate boiling and film boiling regimes for(More)
Carbon nanotubes (CNT) were synthesized on heated scanning probes and under ambient conditions without requiring Chemical vapor deposition (CVD) apparatus or process gases. In this study, dip pen nanolithography (DPN) techniques were utilized for deposition of catalyst precursors on the scanning probe tips in the form of aqueous solution of metal(More)
Nanomaterials were obtained by dispersing silica nanoparticles in eutectic salt mixtures. The synthesis protocol was varied to obtain different nanomaterial samples of the same composition but different morphologies. The synthesis protocols that led to agglomerated nanoparticles resulted in coarse powders (Type-A samples) and the protocols that led to(More)
Keywords: Nanotechnology Flow boiling Heat transfer enhancement Multi walled carbon nanotubes (MWCNT) Chemical vapor deposition Multi phase flows a b s t r a c t In this study we measure the flow boiling heat flux on a horizontal heater that is heated from below. The horizontal heater consists of either a bare silicon wafer or a silicon wafer that is coated(More)
Dip Pen Nanolithography (DPN TM) is an important technique for nanotechnology and a fundamental new tool for studying the consequences of miniaturization. In this scanning probe technique a sharp tip is coated with a functional molecule (the 'ink') then brought into contact with a surface where it deposits ink via a water meniscus. The DPN process is a(More)