tailieunhanh - Báo cáo hóa học: " Ultraviolet Extinction and Visible Transparency by Ivy Nanoparticles"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Ultraviolet Extinction and Visible Transparency by Ivy Nanoparticles | Nanoscale Res Lett 2010 5 1487-1491 DOI s11671-010-9666-2 NANO EXPRESS Ultraviolet Extinction and Visible Transparency by Ivy Nanoparticles Quanshui Li Lijin Xia Zhili Zhang Mingjun Zhang Received 6 May 2010 Accepted 3 June 2010 Published online 16 June 2010 The Author s 2010. This article is published with open access at Abstract Though much research has been conducted for nanoparticles naturally occurring nanoparticles have not yet been well explored for their diverse properties and potential applications. This paper reports the optical absorption and scattering properties of nanoparticles secreted by English ivy. Both experimental and theoretical studies have been conducted. Strong ultraviolet extinction and excellent visible transparency are observed compared to the inorganic TiO2 and ZnO nanoparticles at similar concentrations. The contributions of absorption and scattering to the total extinction are quantified by simulation of the Mie scattering theory. Keywords Ivy nanoparticle Optical absorption Light scattering Introduction Optical properties of naturally occurring organic nanoparticles have not been well explored. Their potential applications are largely unknown. This may be due to two reasons. First research in the field of natural organic nanoparticles is new to material science. Although natural nanostructures with biological functions have been found for many years 1 2 natural organic nanoparticles have not been investigated for material properties such as Q. Li L. Xia Z. Zhang M. Zhang Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee Knoxville TN 37996 USA e-mail zzhang24@ mechanical and optical properties until recent years 3 . Second most attention is attached to artificial organic nanoparticles 4 5 . These nanoparticles formed of organic molecules and polymers offer variable optical properties due to the abundant alternative components. However in the case of biological .