Synthesis of Au Nanorods by Using Gamma-ray Irradiation

Akihiko Okamoto; Koichiro Nagata; Noboru Taguchi; Akihiro Iwase; Fuminobu Hori

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Synthesis of Au Nanorods by Using Gamma-ray Irradiation

机译：γ射线辐照合成金纳米棒

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To synthesize Au nanorods without the use of seed crystals, we applied gamma-ray irradiation from ~(60)Co radioactive source to reduce aqueous solution containing Au ions. The total dose was fixed to 6.0 kGy with various dose rates from 0.4 to 13.6 kGy/h. After the irradiation, two surface plasmon bands in the range around 530 nm and above 700 nm were observed in UV/vis spectra. We observed by a transmission electron microscopy (TEM) that rod-shaped Au nanoparticles with the length of 20-25 nm, and the width of about 7-15 nm were produced as well as a small amount of spherical particles. The size and the aspect ratio of the Au nanorods are well correlated with gamma-ray irradiation dose rate; with increasing the dose rate, their size decreases and the aspect ratio increases.

机译：为了在不使用晶种的情况下合成Au纳米棒，我们应用了〜（60）Co放射源的伽马射线辐照来还原含Au离子的水溶液。总剂量固定为6.0 kGy，剂量率为0.4至13.6 kGy / h。照射后，在UV / vis光谱中观察到在530nm左右和700nm以上范围内的两个表面等离激元带。我们通过透射电子显微镜（TEM）观察到，产生了长度为20-25nm，宽度为约7-15nm的棒状Au纳米颗粒以及少量的球形颗粒。金纳米棒的尺寸和长宽比与γ射线辐照剂量率密切相关。随着剂量率的增加，它们的尺寸减小，纵横比增加。

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来源
《Japanese journal of applied physics》 |2012年第11issue2期|11PH01.1-11PH01.3|共3页
作者
Akihiko Okamoto; Koichiro Nagata; Noboru Taguchi; Akihiro Iwase; Fuminobu Hori;
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Department of Materials Science, Osaka Prefecture University, Sakai 599-8531, Japan;

Department of Materials Science, Osaka Prefecture University, Sakai 599-8531, Japan;

Department of Materials Science, Osaka Prefecture University, Sakai 599-8531, Japan;

Department of Materials Science, Osaka Prefecture University, Sakai 599-8531, Japan;

Department of Materials Science, Osaka Prefecture University, Sakai 599-8531, Japan;

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Synthesis of Au Nanorods by Using Gamma-ray Irradiation

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