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飛秒激光誘導(dǎo)金納米球殼形貌變化
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海南省自然科學(xué)基金（807021）；海南省教育廳高等學(xué)校科研項(xiàng)目（Hj200707）；海南省重點(diǎn)學(xué)科建設(shè)項(xiàng)目子項(xiàng)目（xkxm0822-04）


Femtosecond Laser-Induced Shape Change from Gold Nanoshell to Nanotube
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    摘要:

    采用800 nm的飛秒（10-15 s，fs，下同）激光對(duì)濕化學(xué)法制備的金納米球殼水溶膠進(jìn)行輻照，研究輻照后金納米球殼的形貌變化。結(jié)果表明，原來直徑為20~50 nm的準(zhǔn)球殼形納米金粒子輻照后變?yōu)楣軤罱Y(jié)構(gòu)，其直徑約為10 nm，長(zhǎng)度為100~200 nm。輻照后其吸收光譜在約800 nm處的吸收峰消失，在約450 nm處出現(xiàn)了新的吸收峰。這種飛秒激光輻照下形貌變化的原因?yàn)椋涸陲w秒激光輻照下產(chǎn)生了靜電場(chǎng)，在電場(chǎng)力的作用下，相互靠近的金納米球殼彼此鏈接，并沿著電場(chǎng)方向伸展，形成了管狀結(jié)構(gòu)。

    Abstract:

    Colloidal gold nanoshells prepared by wet chemical method were irradiated using 800 nm femtosecond laser and their shape change was investigated. Results show that the gold nanoparticles of quasi-sphere-shells with 20~50 nm diameter changed to tube structure of 100~200 nm length and 10 nm diameter after femtosecond laser exposure. In the adsorption spectra, the absorption peak of the gold nanoshell at about 800 nm disappeared and a new absorption peak appeared at about 450 nm. The shape change can be attributed to the electrostatic field from the femtosecond laser exposure. With the force of the electrostatic field, nearby gold nanoshells linked each other, and extended along the electrostatic filed direction to form tube structure.

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劉鐘馨,宋宏偉,鄭著宏.飛秒激光誘導(dǎo)金納米球殼形貌變化[J].稀有金屬材料與工程,2009,38(12):2199~2201.[Liu Zhongxin, Song Hongwei, Zheng Zhuhong. Femtosecond Laser-Induced Shape Change from Gold Nanoshell to Nanotube[J]. Rare Metal Materials and Engineering,2009,38(12):2199~2201.]
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  • 收稿日期:2008-11-20
  • 最后修改日期:2009-09-02
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