Change search
ReferencesLink to record
Permanent link

Direct link
Self-transport and self-alignment of microchips using microscopic rain
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology.
Aalto University.
Aalto University.
Aalto University.
Show others and affiliations
2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, 14966Article in journal (Refereed) Published
Abstract [en]

Alignment of microchips with receptors is an important process step in the construction of integrated micro- and nanosystems for emerging technologies, and facilitating alignment by spontaneous self-assembly processes is highly desired. Previously, capillary self-alignment of microchips driven by surface tension effects on patterned surfaces has been reported, where it was essential for microchips to have sufficient overlap with receptor sites. Here we demonstrate for the first time capillary self-transport and self-alignment of microchips, where microchips are initially placed outside the corresponding receptor sites and can be self-transported by capillary force to the receptor sites followed by self-alignment. The surface consists of hydrophilic silicon receptor sites surrounded by superhydrophobic black silicon. Rain-induced microscopic droplets are used to form the meniscus for the self-transport and self-alignment. The boundary conditions for the self-transport have been explored by modeling and confirmed experimentally. The maximum permitted gap between a microchip and a receptor site is determined by the volume of the liquid and by the wetting contrast between receptor site and substrate. Microscopic rain applied on hydrophilic-superhydrophobic patterned surfaces greatly improves the capability, reliability and error-tolerance of the process, avoiding the need for accurate initial placement of microchips, and thereby greatly simplifying the alignment process.

Place, publisher, year, edition, pages
2015. Vol. 5, 14966
National Category
Manufacturing, Surface and Joining Technology Fluid Mechanics and Acoustics
URN: urn:nbn:se:uu:diva-265291DOI: 10.1038/srep14966ISI: 000362486700001PubMedID: 26450019OAI: diva2:865051
Available from: 2015-10-26 Created: 2015-10-26 Last updated: 2015-11-10Bibliographically approved

Open Access in DiVA

fulltext(1068 kB)103 downloads
File information
File name FULLTEXT01.pdfFile size 1068 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Chang, BoHjort, Klas
By organisation
Microsystems Technology
In the same journal
Scientific Reports
Manufacturing, Surface and Joining TechnologyFluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
Total: 103 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 463 hits
ReferencesLink to record
Permanent link

Direct link