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ICMAB Events

"On the alignment of macromolecules, polarised photodetectors and condoms" by Aleksandr Perevedentsev (Mon, 12 Dec 2022)

The Seminars and Training Committee kindly invites you to the following ICMAB Periodical Lecture by one of the co-founders of Molecular Gate S.L.:

28 November 2022

On the alignment of macromolecules, polarised photodetectors and condoms


by Aleksandr Perevedentsev, Molecular Gate S.L., Spin-Off of ICMAB-CSIC

Monday, 12 December 2022
12 PM
ICMAB - Sala d'Actes Carles Miravitlles


The mere act of aligning an ensemble of polymer chains along a given axis transforms its physical characteristics more dramatically than, arguably, any other post-synthesis approach that one can summon. Consider an oriented polyethylene fiber: an object with the density of water and a tensile strength which is double of steel – and 100-fold higher than the unoriented polymer. It is not surprising, therefore, that Nature calls upon fibrous proteins to assemble the body’s connective and muscle tissues, while synthetic fibers permeate the textile and composites industries. This broad-brush overview will examine the above in the context of molecular electronic materials. How does one align macromolecules in a thin-film format?

How to deal with fibrillar topography for device fabrication? What functionalities are gained by unmasking the intrinsically 1D characteristics of macromolecular semiconductors? These questions will be examined using a case-in-point example of polarised photodetectors based on oriented all-polymer bulk heterojunction active layers. With the community actively seeking performance enhancements derived from advanced processing, molecular alignment is proposed as an elegant means to get more out of your beautiful materials.


Aleksandr Perevedentsev obtained his PhD Degree in Physics from Imperial College London and the fascination with macromolecules from his postdoctoral stays at ETH Zürich and ICMAB-CSIC. Following a postdoctoral fellowship at the Karlsruhe Institute of Technology, he re-joined ICMAB in 2022 to pursue technology transfer activities in the field of patterned optical security systems. His research interests are centred around materials processing, phase behaviour and spectroscopy.

Hosted by Alejandro Goñi, NANOPTO group, ICMAB-CSIC

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