TY - JOUR
T1 - Redispersion of dried gold nanorods in the presence of 6-amino-1- hexanethiol hydrochloride
AU - Honda, Kanako
AU - Kawazumi, Hirofumi
AU - Nakashima, Naotoshi
AU - Niidome, Yasuro
N1 - Funding Information:
Acknowledgments This study was supported by a Grant-in-Aid for Scientific Research (No. 15350085), KAKENHI (Grant-in-Aid for Scientific Research) on priority area ‘‘Strong Photon-Molecule Coupling Fields (No. 470),’’ and a Grant-in-Aid for the Global COE Program ‘‘Science for Future Molecular Systems’’ from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government.
PY - 2011/8
Y1 - 2011/8
N2 - Aggregates of phosphatidylcholine-passivated gold nanorods were prepared by the addition of hydrochloric acid in the presence of 6-amino-1-hexanethiol hydrochloride (AHT). The aggregates dried in vacuum formed a solid film showing a metallic gold color. In spite of the absence of the stable surface-wrapping agents, such as balky polymer or thiol-molecules that form stable self-organized films on a gold surface, the dried aggregates dispersed again in water. The redispersed gold nanorods in water did not form aggregates. If the dried nanorods were kept at room temperature for 24 h, they did not disperse in water again; however, at -30 °C, some of gold nanorods could be redispersed in water. At -80 °C, gold nanorods could be redispersed in water as colloidal nanoparticles even after 2 months. The phosphatidylcholine and AHT molecules on the nanorod surfaces contributed to the suppression of the contact of nanorods, which were in the metallic gold color films.
AB - Aggregates of phosphatidylcholine-passivated gold nanorods were prepared by the addition of hydrochloric acid in the presence of 6-amino-1-hexanethiol hydrochloride (AHT). The aggregates dried in vacuum formed a solid film showing a metallic gold color. In spite of the absence of the stable surface-wrapping agents, such as balky polymer or thiol-molecules that form stable self-organized films on a gold surface, the dried aggregates dispersed again in water. The redispersed gold nanorods in water did not form aggregates. If the dried nanorods were kept at room temperature for 24 h, they did not disperse in water again; however, at -30 °C, some of gold nanorods could be redispersed in water. At -80 °C, gold nanorods could be redispersed in water as colloidal nanoparticles even after 2 months. The phosphatidylcholine and AHT molecules on the nanorod surfaces contributed to the suppression of the contact of nanorods, which were in the metallic gold color films.
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U2 - 10.1007/s11051-011-0263-9
DO - 10.1007/s11051-011-0263-9
M3 - Article
AN - SCOPUS:80051579209
VL - 13
SP - 3413
EP - 3421
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
SN - 1388-0764
IS - 8
ER -