A simple method to produce dendrimer nanodots over centimeter scales by rapid evaporation of solvents

Masahito Sano, Junko Okamura, Atsushi Ikeda, Seiji Shinkai

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A simple method to produce aggregates of dendrimers in a form of nanometer-sized round dots over an area measured in centimeters is presented. The method is based on rapid evaporation of a solvent from a thin cast film of an electrolyte solution of polyamidoamine dendrimers on mica. Chemically specific adsorption, electrostatic interactions, phase transitions, and dewetting instabilities are shown not to be responsible for the dot formation. Changes in temperature and humidity have only little effect. There is a threshold evaporation rate above which the dots are formed. Once formed, the dot size and spacing are independent of the evaporation rate. The dot is also formed by different types of dendrimers and solutes, demonstrating the wide applicability of the present method.

Original languageEnglish
Pages (from-to)1807-1810
Number of pages4
JournalLangmuir
Volume17
Issue number6
DOIs
Publication statusPublished - Mar 20 2001

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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