Raj Kumar Bera

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Functional nanomaterials have emerged as promising candidates in the development of an amperometric sensing platform for the detection and quantification of bioanalytes. The remarkable characteristics of nanomaterials based on metal and metal oxide nanoparticles, carbon nanotubes, and graphene ensure enhanced performance of the sensors in terms of(More)
UNLABELLED The antimicrobial activity of fluorescent Ag nanoparticles of 1·5 nm (nAg-Fs) is demonstrated and compared with the other Ag nanoparticles of different shapes and size. The antimicrobial activity was evaluated using Gram-positive (Staphylococcus epidermidis NCIM2493 and Bacillus megaterium) and Gram-negative bacteria (Pseudomonas aeruginosa(More)
Because [15O]butanol is the radiopharmaceutical of choice for PET studies of cerebral perfusion and neurological activation, we have developed a microprocessor-controlled radiosynthetic system for the preparation of this radiotracer in up to ten batches at a time. An IBM-compatible minicomputer was programmed to direct the reaction of molecular [15O]oxygen(More)
A highly sensitive analytical method based on Au nanoparticles rationally tailored with recognition elements uracil-5-carboxylic acid (UCA) and 2,4,6-trinitrobenzenesulfonic acid (TNBS) for the visual sensing of melamine at the parts-per-billion (ppb) level is described. The tailored Au nanoparticles function as an excellent color indicating reporter and it(More)
A self-assembled monolayer (SAM) of 1-(3,5-epidithio-2,3,5-trideoxy-β-D-threo-pentofuranosyl)thymine (EFT) on a gold electrode was prepared and characterized by Raman spectral and electrochemical measurements. Voltammetric and electrochemical impedance measurements show that the SAM of EFT on a Au electrode impedes the electron-transfer reaction. The SAM of(More)
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