SAXS measurement of aggregate of DNA modified gold nanoparticles | Zendy

S. Yamakoshi | Zendy; Yasuhiro Sakai | Zendy; Yuya Shinohara | Zendy; Yoshiyuki Amemiya | Zendy; Naoki Kanayama | Zendy; Tohru Takarada | Zendy; M. Maeda | Zendy; Kohzo Ito | Zendy

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SAXS measurement of aggregate of DNA modified gold nanoparticles

Author(s) -

S. Yamakoshi,

Yasuhiro Sakai,

Yuya Shinohara,

Yoshiyuki Amemiya,

Naoki Kanayama,

Tohru Takarada,

M. Maeda,

Kohzo Ito

Publication year - 2007

Publication title -

nucleic acids symposium series

Language(s) - English

Resource type - Journals

eISSN - 1746-8272

pISSN - 0261-3166

DOI - 10.1093/nass/nrm168

Subject(s) - small angle x ray scattering , colloidal gold , dna , nanoparticle , conjugated system , materials science , nanotechnology , biophysics , crystallography , scattering , chemical engineering , chemistry , polymer , optics , biochemistry , biology , physics , engineering , composite material

DNA-modified gold nanoparticles exhibit a unique aggregation behaviour that they form aggregation with fully complementary DNA but do not with the terminal-mismatched DNA at certain concentration of added salts. We studied the aggregation structure of the nanoparticles by small angle X-ray scattering (SAXS). The results indicated that the gap between surfaces of gold nanoparticles is nearly two times as long as DNA in B-form. This suggests that the ends of completely double-stranded DNA (dsDNA) conjugated on gold nanoparticles contact or slightly interdigitate with each other in the aggregation structure.

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