Chiroptical Study of Plasmon鈥揗olecule Interaction: The Case of Interaction of Glutathione with Silver Nanocubes

详细信息    查看全文

• 作者：Maria C. di Gregorio ; Assaf Ben Moshe ; Einat Tirosh ; Luciano Galantini ; Gil Markovich
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：July 30, 2015
• 年：2015
• 卷：119
• 期：30
• 页码：17111-17116
• 全文大小：364K
• ISSN：1932-7455

文摘

Inorganic nanoparticle鈥揷hiral molecule coupling may produce chiroptical effects at the inorganic particles鈥?excitation wavelengths. In this work, we demonstrate that low concentrations of glutathione molecules adsorbed to cube-shaped silver nanoparticles lead to the appearance of new circular dichroism signals in the plasmon resonance absorption range. Moreover, for pH values of <4.5, the nanoparticle surface promotes reversible thiol group oxidation, leading to the formation of diglutathione and consequent reversible modification of both the molecular and plasmonic circular dichroism and absorption spectra. This study demonstrates the importance of chiroptical effects as probes of molecule鈥搃norganic nanocrystal interaction.