Publication

Thermal scanning probe lithography on a glassy supramolecular film creates a combination of topogrpahy and fluroescent nanostructures

2016
Talks

Abstract

Here, we report the nanoscale thermal modification of a new type of fluorescent stimuli-responsive supramolecular polymer assembled from a building block (OPV(UPy)2-RG), which features an excimer-forming fluorescent oligo(phenylene vinylene) (OPV) chromophore as its core and hydrogen-bonding ureido-4-pyrimidinone (UPy) end groups. By means of a heated AFM probe we modify the material at high heating and cooling rates which allows to kinetically trap the high temperature state of the material, causing a fluorescence contrast between patterned and unpatterned areas. We demonstrate that this concept can be used to create complex features which have potential applications in anti-counterfeiting.

Official source

https://infoscience.epfl.ch/entities/publication/cd93006d-3a7d-4fbf-94a4-650e6f0f9d9f

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

2016
Talks

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/cd93006d-3a7d-4fbf-94a4-650e6f0f9d9f

About this result

Related concepts (31)

Scanning probe lithography

Scanning probe lithography (SPL) describes a set of nanolithographic methods to pattern material on the nanoscale using scanning probes. It is a direct-write, mask-less approach which bypasses the diffraction limit and can reach resolutions below 10 nm. It is considered an alternative lithographic technology often used in academic and research environments. The term scanning probe lithography was coined after the first patterning experiments with scanning probe microscopes (SPM) in the late 1980s.

Cooling tower

A cooling tower is a device that rejects waste heat to the atmosphere through the cooling of a coolant stream, usually a water stream, to a lower temperature. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or, in the case of dry cooling towers, rely solely on air to cool the working fluid to near the dry-bulb air temperature using radiators.

Laser cooling

Laser cooling includes a number of techniques in which atoms, molecules, and small mechanical systems are cooled, often approaching temperatures near absolute zero. Laser cooling techniques rely on the fact that when an object (usually an atom) absorbs and re-emits a photon (a particle of light) its momentum changes. For an ensemble of particles, their thermodynamic temperature is proportional to the variance in their velocity. That is, more homogeneous velocities among particles corresponds to a lower temperature.