Essays on Faraday

Gold Nanoparticles Article Summaries.

Original Article Summary: Turkevich, Stevenson, & Hillier, 1951. In their 1951 article, Turkevich, Stevenson, and Hillier explore the nucleation processes and growth of colloidal gold nanoparticles during synthesis under different methods. The paper explores the standard preparation methods of colloidal gold which all use a nucleating agent which usually comprises reducing agents that later form a mixed polymer with a chloroauric ion before reduction to the nucleus occurs. The authors of this paper explore gold colloids synthesis methods such as Bredig’s electrical arc synthesis, the Faraday method, and reduction methods using acetone, tannin gold solution, oxalic acid, Hydroxylamine hydrochloride, ...

This video highlights the development of theory of interaction of electricity with magnetism. A number of scientists were involved in understanding, interpreting and validating electromagnetism with simple experiments involving current and magnetic elements. During September 1820, Ampere investigated magnetic effects of repulsion/attraction between like/unlike poles. He developed theory of electro-dynamics related to magnetism as interaction of current elements. Laplace was skeptical of his ideas while some other scientists like Fernel started thinking on converse patterns. Some other scientists like Jean Fernel focused on theory of production of electricity by magnetism and production of currents in conducting metals. Jean Fernel ...