Trapping with optical pumped heat sources: From trapped molecules to colloids

Frank Cichos

doi:10.1117/12.2570469

20 August 2020 Trapping with optical pumped heat sources: From trapped molecules to colloids

Frank Cichos

Proceedings Volume 11463, Optical Trapping and Optical Micromanipulation XVII; 1146308 (2020) https://doi.org/10.1117/12.2570469
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

The generation of localized temperature gradients is accompanied by new fundamental physics and also provides new tools for the control of molecules, particles or more complex matter in solution. We describe experiments, which use metal nano- and microstructures as optically pumped heat sources. Heat flowing from these structures along solid/liquid interfaces sets liquids into motion. With the help of such thermo-osmotic creep flows, we can trap particles and single molecules suspended in liquids without body forces but with forces balances. Also, the compression of macro-molecules becomes accessible. The inhomogeneous temperature, however, also modifies the Brownian dynamics. We report applications in the field polymer physics and protein aggregation, where such trapping techniques provide a unique new insight. We address the dynamics of heated colloids in optical tweezers with nanosecond time resolution and picometer spatial resolution to understand thermal non-equilibrium effects.

Conference Presentation

Citation Download Citation

Frank Cichos "Trapping with optical pumped heat sources: From trapped molecules to colloids", Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 1146308 (20 August 2020); https://doi.org/10.1117/12.2570469

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available