Question

Explain why gold coating is required when preparing samples for the scanning electron microscopy (SEM)?

Answer 1

Date: Page no:_ . Answer: gold has many scientific Engineering and the Application gold is helpful in prepare specimens for Scanning electron microscopes (SEM) SEM hap powerful Capacity to produces magnified Images of a Sample by ste scanning it in a vaccum with a beam of accelerated electrone Than electron interact with atoms in the sample and producing various Signals That The SEM analyze To determine informatory about surface topography and composition of sample we got a digital gmage, gold is conductive So Electric ally conductive specimens interact better with In coming beam of electron and resulting in a clear gmage . If were without g old Coating it mean non I conduactive sample that will build up an electrostatic I change That interfers with the signale So final amage are we do not get the final gmage well. Bome conductive materials :- nola - Tungsten - chromium - platinum