Women in Nanoscience

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Women in Nano Blog

Liselotte Jauffred and Lene Oddershede pluck gold nanoparticles from the air

Posted on July 25, 2015 at 7:20 PM

The use of "optical tweezers" to manipulate metallic nanoparticles in liquids has been studied extensively. However, the optical manipulation of nanoparticles in air has hardly been explored, despite its potential importance in applications such as heat transfer at nanoscale solid-gas interfaces.


 

(Liselotte Jauffred)


In a recent NanoLetters article, Dr. Liselotte Jauffred, a post-doctoral researcher in Prof. Lene Broeng Oddershede's group at the Niels Bohr Institute, in Denmark, demonstrated the very first trapping of individual gold nanoparticles in air. Their results reveal our first insight into the physics involved, for example, the fact that the linear relation between a laser focused on nanoparticles in air and the resulting trapping strength is reversed at certain length scales. This is contrary to the relationship between the laser and nanoparticles in water, which is linear at all length scales. Jauffred noted that this information could be helpful in understanding Brownian motion in air with a temperature gradient, which may be important for a process like aerotaxy, a gas-phase synthesis that could mass-produce well-defined nanostructures.


(Lene Broeng Oddershede)



 

(Liselotte Jauffred)


Prof. Oddershede currently serves as the leader for StemPhys, a Danish National Research Foundation Center of Excellence. She received the 2015 Elite Research Prize and received the 2011 CeNS publication Award issued by the Center for Nanoscience. Dr. Jauffred currently works as a postdoctoral researcher in the field of optical trapping and manipulation of nanoparticles, quantum dots, and biological cells.


(Lene Broeng Oddershede)


- Written by Eugene Choi, Edited by Paulette Clancy


(Photo credit: Oddershede: Provided by Oddershede, credit to Ola Joensen, Jauffred: Provided by and used with permission from Liselotte Jauffred).

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