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Thermocapillary Multidewetting of Thin Films

Published online by Cambridge University Press:  04 April 2018

Arielle R. Gamboa ,
Michael P. Nitzsche ,
Valeria Saro-Cortes ,
Tianxing Ma ,
Lin Lei  and
Jonathan P. Singer
Arielle R. Gamboa*
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
Michael P. Nitzsche
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
Valeria Saro-Cortes
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
Tianxing Ma
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
Lin Lei
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
Jonathan P. Singer
Affiliation:
Rutgers University, Department of Mechanical and Aerospace Engineering, 98 Brett Road, Piscataway, NJ08854, U.S.A
*
*(Email: [email protected])

Abstract

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Thermocapillary dewetting of liquids and molten films has recently emerged as a viable alternative to conventional microprocessing methods. As this thermal gradient-induced mechanism is universal, it can be applied to any material. This work explores the sequential dewetting of materials with varying melting points, including polymers and metals, to create aligned morphologies. The variation in melting point allows for the dewetting of single layers at a time or mobility-limited simultaneous dewetting. As a result, a variety of multimaterial structures can be produced with built-in alignment, such as arrays of concentric circles, lines with periodic segmentation, or islands on holes. This approach employs photothermal methods to induce the necessary thermal gradient, manipulating several variables in order to influence the consequent structures. Adjusting laser power and light intensity allows for the control of temperature for selective dewetting of films; altering beam size and exposure time affects the extent of dewetting in terms of diameter size; overlap effects and simultaneous dewetting can result in complex architectures. This controlled writing of patterns also presents a technique to create both masks at low temperatures for conductive multilayers as well as templates for electrospray deposition.

Keywords

thin filmlasermolecular weight
Type
Articles
Information
MRS Advances , Volume 3 , Issue 18: Processing and Manufacturing , 2018 , pp. 977 - 982
Copyright
Copyright © Materials Research Society 2018 

References

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