Silver nanoplates and nanowires by a simple chemical reduction method |
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Authors: | Khan Zaheer Hussain Javed Ijaz Kumar Sunil Hashmi Athar Adil |
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Institution: | Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India. drkhanchem@yahoo.co.in |
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Abstract: | The critical micelle concentration (cmc) of an amphiphilic drug amitriptyline hydrochloride (AMT) was determined in the presence of varying amounts of inorganic salts (NaF, NaCl, NaBr, LiCl, KCl), urea and thiourea over the temperature range 293–308 K by conductometric and dye solubilization (ambient) techniques. The cmc values showed an inverted U-shaped behavior with temperature. In the presence of salts the cmc decreased which is explained on the basis of the nature and ion size. Urea and thiourea, at low concentrations (0.2 mM urea and 0.1 mM thiourea), decreased the cmc, whereas, at high concentrations, increase was observed with both the additives. Relevant thermodynamic parameters were also evaluated and discussed. |
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