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MicACol

Microrheology of two-dimensional active colloidal crystals and glasses

Total Cost €

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EC-Contrib. €

0

Partnership

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 MicACol project word cloud

Explore the words cloud of the MicACol project. It provides you a very rough idea of what is the project "MicACol" about.

behavior    living    confinements    microrheology    packed    assemble    contact    near    difficulty    coated    quantify    propel    designed    semi    phases    protocol    optical    lot    dilute    nature    catalytic    numerical    ranged    close    significantly    serve    primarily    physics    benchmarks    microswimmers    water    suspensions    extensively    active    probe    synthetic    attractive    interface    homogeneous    light    peroxide    relation    glasses    flat    materials    partly    experiments    originally    date    unexplored    made    self    fluctuations    microorganims    elucidate    amount    forces    material    effort    loosely    smart    fundamental    intimate    dense    invested    dispersed    passive    instance    configurations    motion    lag    platinum    oil    propelling    monolayers    environments    stems    solid    brownian    crystals    mix    hydrogen    colloids    reaction    tweezing    structural    mimic    colloidal    equipped    desirable    mechanical    structure    repulsive    simulations    entirely    engineer    shed    particles   

Project "MicACol" data sheet

The following table provides information about the project.

Coordinator
THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD 

Organization address
address: WELLINGTON SQUARE UNIVERSITY OFFICES
city: OXFORD
postcode: OX1 2JD
website: www.ox.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website https://www.buttinoni.co.uk/
 Total cost 183˙454 €
 EC max contribution 183˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2016
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2017
 Duration (year-month-day) from 2017-09-04   to  2019-09-03

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD UK (OXFORD) coordinator 183˙454.00

Map

 Project objective

Self-propelling colloidal particles, originally designed to mimic living microorganims, offer exciting opportunities to engineer smart materials equipped with activity. To date, the behavior of synthetic microswimmers has been extensively studied in homogeneous environments, close to confinements and in semi-dilute suspensions. However, for materials’ design, the use of solid-like phases, such as crystals and glasses, is highly desirable. While recent numerical simulations have invested a lot of effort in understanding the structural and mechanical properties of dense colloidal materials with activity, experiments significantly lag behind. One difficulty stems, for instance, from the presence of short-range attractive forces that affect the active motion when two of more microswimmers come near contact.

In this project, we will investigate the mechanical properties of dense monolayers made partly or entirely of self-propelling colloids using microrheology. We will assemble colloidal monolayers at a flat oil/water interface, where long-ranged repulsive forces will lead to the formation of crystals and glasses with loosely-packed configurations, i.e. with particles that are far from contact. We will mix passive Brownian particles with a controlled amount of active platinum coated particles that self-propel due to a catalytic reaction with hydrogen peroxide dispersed in water. We will elucidate the intimate relation between structure, activity and mechanical properties of dense active suspensions using microrheology experiments, in which we will analyse the fluctuations of a probe driven through the active material by means of an optical tweezing. Our results will shed new light on the unexplored physics of active crystals and glasses and provide a protocol to quantify their mechanical properties. While the proposal research is primarily fundamental in nature, our findings will serve as benchmarks for the design of novel active materials and devices.

 Publications

year authors and title journal last update
List of publications.
2018 Kilian Dietrich, Giovanni Volpe, Muhammad Nasruddin Sulaiman, Damian Renggli, Ivo Buttinoni, Lucio Isa
Active Atoms and Interstitials in Two-Dimensional Colloidal Crystals
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.120.268004
Physical Review Letters 120/26 2019-11-07

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