Liquid manipulation lithography to fabricate a multifunctional microarray of organosilanes on an oxide surface under ambient conditions

Naoto Shirahata, Jun Nakanishi, Yoshitaka Echikawa, Atsushi Hozumi, Yoshitake Masuda, Shigeru Ito, Yoshio Sakka

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A novel method to produce a multifunctional microarray in which different types of self-assembled monolayers (SAMs) are positioned on predefined surface sites on an oxide-covered silicon substrate is described. To achieve this, a liquid-transportation system called "liquid manipulation lithography" (LML) is developed. This system allows the delivery of different varieties of molecular inks, trialkoxysilanes, onto each predefined surface position of the given substrate even under ambient conditions. Under optimum conditions, the transferred trialkoxysilane inks first form one-molecule-thick microstructures at each surface position through the hydrolysis of the reactive silanes with surface water adsorbed on the substrate, followed by a condensation reaction. Three types of trialkoxysilanes with long alkyl-chains, specifically triethoxysilylundecanal (TESUD), W-(6-aminohexyl)-3-aminopropyltrimethoxysilane (AHAPS), and octadecyltrimethoxysilane (OTS), are used as model molecular inks due to their high-end group-functionalities in biological and electronic applications. The precise positioning of the ink with submicrometer edge resolution is performed by carefully controlling a femtoliter-scale liquid-injection micromanipulator under a microscope. To ensure that the prepared SAM microarray is available for parallel analysis of biomolecular interactions, the area-selective immobilization of a protein molecule is explored. Successful observation of the area-selective biomolecular attachment confirmed a high industrial potential for the method as a lithography-free process for the miniaturization of a multifunctional SAM array on an oxide substrate.

Original languageEnglish
Pages (from-to)3049-3055
Number of pages7
JournalAdvanced Functional Materials
Volume18
Issue number19
DOIs
Publication statusPublished - 2008 Oct 9
Externally publishedYes

Fingerprint

inks
Microarrays
Ink
Oxides
Lithography
manipulators
Self assembled monolayers
lithography
oxides
Liquids
Substrates
liquids
Micromanipulators
liquid injection
Silanes
Molecules
Condensation reactions
Silicon oxides
miniaturization
surface water

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Liquid manipulation lithography to fabricate a multifunctional microarray of organosilanes on an oxide surface under ambient conditions. / Shirahata, Naoto; Nakanishi, Jun; Echikawa, Yoshitaka; Hozumi, Atsushi; Masuda, Yoshitake; Ito, Shigeru; Sakka, Yoshio.

In: Advanced Functional Materials, Vol. 18, No. 19, 09.10.2008, p. 3049-3055.

Research output: Contribution to journalArticle

Shirahata, Naoto ; Nakanishi, Jun ; Echikawa, Yoshitaka ; Hozumi, Atsushi ; Masuda, Yoshitake ; Ito, Shigeru ; Sakka, Yoshio. / Liquid manipulation lithography to fabricate a multifunctional microarray of organosilanes on an oxide surface under ambient conditions. In: Advanced Functional Materials. 2008 ; Vol. 18, No. 19. pp. 3049-3055.
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