A New Theranostic System Based on Gold Nanocages and Phase-Change Materials with Unique Features for Photoacoustic Imaging and Controlled Release
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- 作者：Geon Dae Moon ; Sung-Wook Choi ; Xin Cai ; Weiyang Li ; Eun Chul Cho ; Unyong Jeong ; Lihong V. Wang ; Younan Xia
- 刊名：Journal of the American Chemical Society
- 出版年：2011
- 出版时间：April 6, 2011
- 年：2011
- 卷：133
- 期：13
- 页码：4762-4765
- 全文大小：737K
- 年卷期：v.133,no.13(April 6, 2011)
- ISSN：1520-5126
文摘
This communication reports a new theranostic system with a combination of capabilities to both enhance the contrast of photoacoustic (PA) imaging and control the release of a chemical or biological effector by high-intensity focused ultrasound (HIFU). The fabrication of this system simply involves filling the hollow interiors of gold nanocages with a phase-change material (PCM) such as 1-tetradecanol that has a melting point of 38鈭?9 掳C. The PCM can be premixed and thus loaded with a dye, as well as other chemical or biological effectors. When exposed to direct heating or HIFU, the PCM will melt and escape from the interiors of nanocages through small pores on the surface, concurrently releasing the encapsulated molecules into the surrounding medium. We can control the release profile by varying the power of HIFU, the duration of exposure to HIFU, or both.