User:Pauline Wonnenberg/Notebook/CHEM 471 Fall 2017/2017/10/10

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Objective Prepare Stock solutions (AgNO3, ZnCl2, histidine stock, & cysteine stock) Prepare AuNP, AgNP, & ZnNP Description Prepare AgNO3 solution (4mM) x (10mL) = 4E-5mol (4E-5mol) x (169.87g/mol) = 0.0067948g Prepare ZnCl2 solution (20mM) x (10mL) = 2E-4mol (2E-4mol) x (183.48g/mol) = 0.036696g Prepare histidine solution (35mM) x (25mL) = 8.75E-4mol (8.75E-4mol) x (155.15g/mol) = 0.13576g Prepare cysteine solution (35mM) x (25mL) = 8.75E-4mol (8.75E-4mol) x (121.16g/mol) = 0.106015g Preparation of AuNP, AgNP, & ZnNP Data Results from AuNP preparation highly concentrated colloids were formed with Au Results from AgNP preparation the color change demonstrate the formation of nanoparticles Results from ZnNP preparation no nanoparticles were formed This graph represents the absorbance of the zinc samples in relation to wavelengths.