Assembly of hybrid oligonucleotide modified gold (Au) and alloy nanoparticles building blocks

Yu Ching Kuo, Chun Ping Jen, Yu Hung Chen, Chia Hao Su, Shu Hui Tsai, Chen Sheng Yeh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The alloy-based hybrid materials with macroscopic network arrays were developed by AuAg/Au and AuAgPd/Au nanoparticle composites through oligonucleotides hybridization. AuAg/Au and AuAgPd/Au exhibited distinct organization. The morphology of AuAg/Au conjugation assembled mainly as compact aggregates while AuAgPd/Au hybrid conjugated into the loosen network assemblies. The dehybridization temperatures were studied as a function of molar ratio of alloy/Au. It was found that higher alloy/gold molar ratio led to stronger hybridization for alloy/gold composite, accompanied with increased melting temperature. These results could be interpreted in terms of more alloy nanoparticles bound to a Au particle when the molar ratio of alloy/gold increased. The thermal analysis also showed that AuAg/Au exhibited higher dehybridization temperature. A modified model describing the dehybridization probability of an intact Au/alloy aggregate was performed to support the dehybridization temperature increased with increasing alloy/Au molar ratio. As to more oligonucleotides carried by AuAg (4.9 ± 1.9 nm) than by AuAgPd (4.4 ±1.5 nm) due to larger size in AuAg, the efficient hybridization could result in higher dehybridization temperature in AuAg/Au.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume6
Issue number1
Publication statusPublished - 2006 Jan

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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