Research

Assembly by Optical Tweezer

 

Supramolecular assembly of molecules is a concept extensively exploited in chemistry to obtain functionalities and structures not achievable by synthetic strategies based on covalent bonds. In this case, we are pioneering to use holographic optical tweezers (HOT) as a tool to achieve supramolecular assembly. Optical tweezers employ a tightly focused laser beam which can transfer momentum to transparent microparticles and hence confine them near the focal spot.  Utilizing holographically tailored laser light fields, multiple optical traps can be used simultaneously to gain full control over several individual zeolite crystals, opening thus the possibility for the assembly of complex and defined structures.

 

Reference:

1. "Creating functional microstructures with an optical-tweezers assembly-line", M. Woerdemann, M. Veiga-Gutierrez, L. De Cola, C. Denz , Optics and Photonic news, 2012, 23, 47-47.

2. "Optical-Tweezers Assembly-Line for the Construction of Complex functional zeolite L structures", M. Veiga-Gutierrez, M. Woerdemann, E. Prasetyanto, C. Denz, L. De Cola , Adv. Mat., 2012, 24, 5199-5204.