Journal article
Generation of micrometer-sized patterns for microanalytical applications using a laser direct-write method and microcontact printing
Analytical chemistry (Washington), Vol.70(22), pp.4645-4652
1998
DOI: 10.1021/ac9807621
Abstract
This paper describes a procedure that allows the rapid generation of elastomeric masters for microcontact printing (μCP) and for a new variant of this technique: controlled sagging microcontact printing (CSμCP). Using a low-power laser (10 mW) operating at 532 nm, the desired pattern is ablated in a thin poly(methyl methacrylate) film doped with a dye (rhodamine B base). Subsequent pattern transfer into poly(dimethylsiloxane) (PDMS) produces an elastomeric stamp for either μCP or CSμCP. Printing on the surface of gold gives patterns (wires or trenches) with feature sizes as small as 5 μm (μCP) and trenches (but not wires) as small as 1 μm (CSμCP). The ability of this technique to generate functional systems was demonstrated with an array of gold minielectrodes printed on a silicon wafer and an array of chemical microreactors molded in PDMS. The performance of the electrode array was characterized using cyclic voltammetry with Ru(III)(NH3)6Cl3, as the substrate. Microreactors were used as vessels to grow crystals of KNO3 with a narrow dispersion in sizes and with largest dimensions of ~ 15 μm.SCOPUS_ABS_SEPARATORThis paper describes a procedure that allows the rapid generation of elastomeric masters for microcontact printing (μCP) and for a new variant of this technique: controlled sagging microcontact printing (CSμCP). Using a low-power laser (10 mW) operating at 532 nm, the desired pattern is ablated in a thin poly(methyl methacrylate) film doped with a dye (rhodamine B base). Subsequent pattern transfer into poly(dimethylsiloxane) (PDMS) produces an elastomeric stamp for either μCP or CSμCP. Printing on the surface of gold gives patterns (wires or trenches) with feature sizes as small as 5 μm (μCP) and trenches (but not wires) as small as 1 μm (CSμCP). The ability of this technique to generate functional systems was demonstrated with an array of gold minielectrodes printed on a silicon wafer and an array of chemical microreactors molded in PDMS. The performance of the electrode array was characterized using cyclic voltammetry with Ru(III)-(NH3)6Cl3, as the substrate. Microreactors were used as vessels to grow crystals of KNO3 with a narrow dispersion in sizes and with largest dimensions of approx. 15 μm.
Details
- Title: Subtitle
- Generation of micrometer-sized patterns for microanalytical applications using a laser direct-write method and microcontact printing
- Creators
- B. A Grzybowski - Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United StatesR Haag - Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United StatesN Bowden - Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United StatesG. M Whitesides - Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
- Resource Type
- Journal article
- Publication Details
- Analytical chemistry (Washington), Vol.70(22), pp.4645-4652
- Publisher
- American Chemical Society
- DOI
- 10.1021/ac9807621
- ISSN
- 0003-2700
- eISSN
- 1520-6882
- Language
- English
- Date published
- 1998
- Academic Unit
- Chemistry
- Record Identifier
- 9984216604902771
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