Authors: Jang, Seunghyun; Koh, Youngdae; Woo, Hee-Gweon; Sohn, Honglae

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 2, February 2011 , pp. 1328-1332(5)

Publisher: American Scientific Publishers

Abstract:

Porous silicon (PSi) smart particles containing 20(S)-Camptothecin (CPT)-functionalized germanium nanoparticles (Ge-NPs) for a noble drug delivery system were developed. PSi samples were prepared by anodization of a highly doped P⁺⁺-type Si wafer in ethanolic HF solution using a platinum-meshed counter electrode. In this work, PSi was generated by an electrochemical etching of two discrete porous multilayered dielectric mirrors into Si, a top layer was referred to as the "DBR" multilayer, and a bottom layer was the "host" layer intended to infuse CPT-functionalized Ge-NPs. The DBR layer was chemically further passivated with (3-aminopropyl)trimethoxysilane groups. Resulting PSi was removed from the Si substrate by an applying of electropolishing current. CPT-functionalized Ge-NPs were infused into the host layer of PSi free-standing film. Samples were then made into particles by ultrasonic fracture in organic solutions. PSi smart particles were characterized by FE-SEM, FT-IR, EDX, UV-vis absorption, and fluorescence spectroscopy. PSi smart particles containing CPT-functionalized Ge-NPs displayed a linear release profile for the first 12 h, and then perfectly released CPT-functionalized Ge-NPs for 18 h.

Keywords: PSI; DBR; SMART PARTICLES; GE-NPS; CPT; DRUG DELIVERY; RELEASE

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.3305

Publication date: 2011-02-01

More about this publication?

• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
• Editorial Board
• Information for Authors
• Subscribe to this Title
• Terms & Conditions
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Technology
• By this author: Jang, Seunghyun ;  Koh, Youngdae ;  Woo, Hee-Gweon ;  Sohn, Honglae

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers