16 May 2019 from 16:00 to 17:00

Debye Colloquium

Debye Colloquium - Colloidal Crystallization: from Structural Color to Encryption to Catalysis

Debye Institute for Nanomaterials Science, Debye colloquium, Joanna Aizenberg, Debye Visiting Chair
Prof. Joanna Aizenberg

This Debye Colloquium, Colloidal Crystallization: from Structural Color to Encryption to Catalysis, will be given by Debye Visiting Chair Joanna Aizenberg from Harvard University. 

Abstract

This lecture will introduce a reproducible, one-pot sol-gel colloidal co-assembly approach that results in large-scale, highly ordered inverse opal films with embedded, uniformly distributed, and accessible nanoparticles. The unique coloration of these inverse opals combines iridescence with plasmonic effects. When locally functionalized, these films exhibit a sharply defined threshold wettability for infiltration that couples to macroscopic color changes. This approach may find applications in a broad range of technologies, including a convenient and direct method for liquid detection and encryption, or as a tag for low-cost monitoring of tampering or material aging. Extension of this methodology to create a new class of highly stable heterogeneous catalysts will also be discussed.

Start date and time
16 May 2019 16:00
End date and time
16 May 2019 17:00
Entrance fee
Free of charge