Biomedical subjects

A Gambhir

Publications and source records attributed to A Gambhir.

20 records · Page 2Linked to original sources

PubMedDate not supplied

Preparation and characterization of poly-N-vinyl carbazole Langmuir-Blodgett films.

Langmuir monolayers of poly-N-vinyl carbazole (PNVK) were obtained by dispensing PNVK dissolved in tetrahydrofuran onto an air-water interface. Surface pressure-area isotherms of mixed monolayer of the PNVK were studied under different subphase conditions such as temperature and pH of the subphase. It was demonstrated that the monolayer of PNVK remained stable over a temperature range of 10-40 degrees C. The area per molecule of the solid phase was found to be 31 A2. These monolayers were transferred onto indium-tin-oxide-coated glass plates and characterized by spectroscopic and electrochemical techniques.

Air↗

PubMedDate not supplied

Characterization of DNA immobilized on electrochemically prepared conducting polypyrrole-polyvinyl sulfonate films.

The article describes the adsorption characteristics of DNA onto electrochemically generated polypyrrole-polyvinyl sulfonate (PPY-PVS) films obtained as a function of pH. Adsorption on PPY doped with an anion proceeds by anion exchange, and since DNA possesses a fixed negative charge owing to PO4-, it favors a very strong binding displacing PVS with favorable energetic interactions. Characterization of adsorbed DNA onto the PPY-PVS films was carried out by ultraviolet-visible, Fourier transform infrared spectroscopy, and cyclic voltammetric studies.

Adsorption↗