Rapid Cationization of Gold Nanoparticles by Two-Step Phase Transfer

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Abstract

Cationic gold nanoparticles offer intriguing opportunities as drug carriers and building blocks for self-assembled systems. Despite major progress on gold nanoparticle research in general, the synthesis of cationic gold particles larger than 5nm remains a major challenge, although these species would give a significantly larger plasmonic response compared to smaller cationic gold nanoparticles. Herein we present the first reported synthesis of cationic gold nanoparticles with tunable sizes between 8-20nm, prepared by a rapid two-step phase-transfer protocol starting from simple citrate-capped particles. These cationic particles form ordered self-assembled structures with negatively charged biological components through electrostatic interactions.

Original languageEnglish
Pages (from-to)7990-7993
Number of pages4
JournalAngewandte Chemie
Volume54
Issue number27
DOIs
Publication statusPublished - 26 Jun 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • gold
  • nanoparticles
  • phase transfer
  • self-assembly
  • surface plasmon resonance
  • MAMMALIAN-CELLS
  • CITRATE
  • SIZE
  • FUNCTIONALIZATION
  • DNA
  • NANOCRYSTALS
  • REDUCTION
  • SURFACE
  • WATER
  • ACID

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    Metal nanoclusters for fluorescence, catalysis, and heavy metal scavenging

    Huhtamäki, T., Hassinen, J., Vapaavuori, J. & Ras, R.

    01/01/201222/05/2015

    Project: Academy of Finland: Other research funding

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    Anna Rissanen (Manager)

    Aalto University

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