D. Mukherjee

Bio: D. Mukherjee is an academic researcher from Indian Institute of Technology Kharagpur. The author has contributed to research in topics: Radial distribution function & Thin film. The author has an hindex of 3, co-authored 11 publications receiving 105 citations.

A Chemical Method for the Deposition of Bismuth Sulfide Thin Films

Abstract: Depot de couches minces de sulfure de bismuth sur substrat en verre a 25°C a l'aide d'une solution de sel de Bi 3+ , de triethanolamine, NH 3 et thioacetamide

Radial distribution function analyses of polythiohydroquinone

Abstract: In recent years, the RDF analysis [1-4] of X-ray diffraction patterns has become a powerful tool for studying the structures of non-crystalline disordered materials. This technique may be applied to systems for which the average radial distribution function is spherically symmetrical, such as pure liquids, solutions, glasses and finely divided powders. It yields information not only about structural parameters but also many physical parameters such as Debye temperature, coupling coefficients, coordination numbers and interatomic potentials. The polymer, polythiohydroquinone, reported here does not crystallize and therefore single crystal techniques cannot be used to obtain structural information. Hydroquinone and excess sulphur were mixed thoroughly and poured into a glass tube. The tube was flushed several times with nitrogen and placed in a furnace in a nearly horizontal position. The issuing hydrogen sulphide gas was trapped in a lead acetate solution. After several hours the tube was removed and allowed to cool. The material was washed with concentrated sulphuric acid, followed by concentrated alkali solution to remove low molecular weight products and finally with hot carbon disulphide solutions to remove excess sulphur. The yield was about 70%. X-ray diffraction patterns for the present sample were recorded with the help of a Phillips diffractometer on a strip chart, the scanning rate being 2 ° min -1 , using MoK~ radiation in the range s = 0.77 to s = 8.96 (where s = 4re sin 0/4). The background radiation was suppressed with the aid of a discriminator by running the diffractometer once without sample. Then the sample was mounted and the intensities recorded. Other corrections for polarization and absorption were carried out using procedures described by Kaelble [2]. Tubulated values of atomic scattering factors [5] and incoherent scattering factors [6] were used for obtaining independent scattering curves. The corrected intensities were scaled to electron units by the method described by Kroughmoe [7]. The contribution of the flat-faced diffractometer sample in the small-angle region and that due to multiple scattering were subtracted following the method described by Warren [8]. Following the procedure described by Kaelble, the radial distribution function for polyatomic samples, 47t?2~0(r) is given by

Silicon-Based Materials from Rice Husks and Their Applications

Abstract: Rice husk (RH) has now become a source for a number of silicon compounds, including silicon carbide, silica, silicon nitride, silicon tetrachloride, zeolite, and pure silicon. The applications of such materials derived from rice husks are very comprehensive. The methods of synthesizing these silicon-based materials from RHs and their applications are reviewed in this paper.

Magnesium silicide nanoparticles as a deoxygenation agent for cancer starvation therapy

Abstract: A material that rapidly absorbs molecular oxygen (known as an oxygen scavenger or deoxygenation agent (DOA)) has various industrial applications, such as in food preservation, anticorrosion of metal and coal deoxidation. Given that oxygen is vital to cancer growth, to starve tumours through the consumption of intratumoral oxygen is a potentially useful strategy in fighting cancer. Here we show that an injectable polymer-modified magnesium silicide (Mg2Si) nanoparticle can act as a DOA by scavenging oxygen in tumours and form by-products that block tumour capillaries from being reoxygenated. The nanoparticles are prepared by a self-propagating high-temperature synthesis strategy. In the acidic tumour microenvironment, the Mg2Si releases silane, which efficiently reacts with both tissue-dissolved and haemoglobin-bound oxygen to form silicon oxide (SiO2) aggregates. This in situ formation of SiO2 blocks the tumour blood capillaries and prevents tumours from receiving new supplies of oxygen and nutrients.

Sonochemical Method for the Preparation of Bismuth Sulfide Nanorods

Abstract: Bismuth sulfide nanorods have been successfully prepared by a sonochemical method from an aqueous solution of bismuth nitrate and sodium thiosulfate in the presence of complexing agents. Bismuth su...