Skip to ContentSkip to Navigation
About usNews and EventsNews articles

Autonomous movement using a molecular/silica hybrid approach

16 November 2012

PhD ceremony: Mr. R. Roswanda, 16.15 uur, Academiegebouw, Broerstraat 5, Groningen

Proefschrift: Autonomous movement using a molecular/silica hybrid approach

Promotor(s): prof. B.L. Feringa

Faculty: Mathematics and Natural Sciences

One of the most fascinating challenges in nanotechnology is powering and controlling motors. The aim of the research described in this thesis is trying to answer that challenge by creating autonomously moving micro/nano objects that are powered by molecular catalytic propulsion.

The molecular catalytic propulsion is fueled by hydrogen peroxide which is decomposed into water and oxygen by a dinuclear manganese catalyst which is attached the particles. The particles of choice are silica and zeolite L.

The study reveals the size limits at which the force generated by catalytic propulsion will result in autonomous movement before the Brownian motion is overwhelming the system. It is shown that at the submicron size range, the molecular catalytic system attached to silica A (231 ± 35 nm) showed, unexpectedly, a slower diffusion not faster in the presence of hydrogen peroxide.

Further studies are needed to understand the effect of the catalytic reaction of hydrogen peroxide decomposition by the manganese complex on the particle’s movement in this size range.

Last modified:15 September 2017 3.42 p.m.
printView this page in: Nederlands

More news

  • 19 November 2019

    Oldest evidence of salt production in Bronze Age Italy found along Tyrrhenian coast

    A new study by archaeologists of the University of Groningen in collaboration with the University of Rome Tor Vergata,reveals that a series of Bronze and Iron age archaeological sites located on the Tyrrhenian coast of Italy must be interpreted in the...

  • 15 November 2019

    Retirement Jan de Jeu: Board member from outside

    On Friday 15 November 2019, Jan de Jeu will retire from his position in the Board of the University of Groningen after eight years in office. When Jan de Jeu was appointed, it was the first time that the UG broke the tradition of only recruiting board...

  • 15 November 2019

    Hong Kong update: safety first

    We are very concerned regarding the current situation in Hong Kong, especially near some of the premises of our partner universities. The University of Hong Kong, the Chinese University of Hong Kong, and Hong Kong Baptist University have informed us...