Introduction

Work in the group centres on the chemistry and physics of solids and interfaces. It involves the synthesis of semiconductor nanostructures with controlled dimensions and the self-assembly of such building blocks into more complex architectures (quantum-dot molecules and solids)...

Condensed Matter and Interfaces is part of the Debye Institute at the Utrecht University.

Condensed Matter and Interfaces
P.O.Box 80.000
3508 TA UTRECHT
The Netherlands.

Visiting address: Ornstein Laboratory, Princetonplein 1, Utrecht

For phone or e-mail contact, please contact one of our group members.


 

Research

Work in the group centres on the chemistry and physics of solids and interfaces. It involves the synthesis of semiconductor nanostructures with controlled dimensions and the self-assembly of such building blocks into more complex architectures (quantum-dot molecules and solids). We are interested in the size-dependent optical and electrical properties of individual nanocrystals, ensembles of non-interacting nanocrystals and systems in which the building blocks are coupled electronically. Molecular simulations are used to study the self-assembly processes, as well as the molecular scale structure and growth of thin films and single crystals. The optical properties of lanthanide ions in host lattices are investigated in relation to luminescent materials for lighting. The study of interfacial chemistry and photoelectrochemistry is important for semiconductor nanostructures, porous semiconductors and single-crystalline materials. Consideration of possible applications and contacts with industry constitute an important aspect of work in the group.

Synthesis

box A wide range of materials are made in the group. These include: phosphors, semiconductor nanocrystals (quantum dots (QDs)), QD-molecules and higher architectures (2-D arrays, 3-D solids) and porous semiconductors. Such materials are made by a variety of methods: solid-state reactions, wetchemical (colloidal) synthesis, electrodeposition, anodic etching, chemical vapour deposition and template synthesis.

Characterization

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The group has extensive facilities for optical, (opto)electrical and electrochemical studies. Examples of work in progress include:
  1. Optical investigations
    • Luminescence of lanthanide ions in solids.
    • Light absorption and emission in QDs, QD molecules, quantum wires and QD solids. In such studies the role of quantum-size effects is central.
  2. Electronic properties
    • The electronic structure of QDs and QD systems (scanning tunneling spectroscopy).
    • Storage and transport of charge in QD solids (transistor techniques).
  3. Photonic systems
    • Quantum-dot emission in photonic crystals.
    • Light scattering and random lasing in disordered porous media.
  4. Interfacial chemistry
    • Influence of capping on optical and electronic properties of QD systems.
    • Mechanisms of porous etching of semiconductors.
    • Etching and photoelectrochemistry of crystalline semiconductors (Si, GaN, SiC).

Modelling

The research focuses on first-principles (ab initio) modelling of nanoscale materials, with special focus on topological materials and applications in nanoelectronics and spintronic devices. The investigation of the electronic and magnetic properties is performed using ground state and beyond ground-state (GW approximation, Bethe-Salpeter equation) Density Functional Theory techniques. Non-Equilibrium Green’s Function is used to model time dependent phenomena, such as spin-polarized quantum transport and time-dependent photoluminescence. The investigated systems include 2D materials, carbon-based nanostructures (carbon nanotubes, monoatomic carbon chains, graphene, …), hybrid organic-inorganic materials, III-V semiconductor nanowires.

Molecular simulation is a powerful tool in understanding the structure and dynamics of nano-materials as well as their formation processes. These simulations describe the thermodynamics and the interplay on an atomic scale in systems of up to some 100000 atoms, depending on temperature, pressure and other macroscopic parameters. Analytical theories usually apply to either much smaller (one or a few atoms or molecules) or much larger (macroscopic) systems. Molecular simulation fills the gap between the two.

Examples of systems being studied at present are:
  • The self assembly of nanopart.
  • Structure formation in model biomembranes.
  • Catalysis mechanisms of certain zeolites.

Applications

The materials and processes studied in the group are important for a wide range of (potential) applications including lighting (phosphors, GaN-based LEDs), solar cells, microelectromechanical systems and (nano)device technology.


 

People

NameHomepage
Scientific Staff
Andries Meijerinkprof. dr. A. Meijerink (Andries)www.uu.nl/staff/AMeijerink/
Daniël Vanmaekelberghprof. dr. D.A.M. Vanmaekelbergh (Daniël)webspace.science.uu.nl/~vanma101/
Celso de Mello Donegádr. C. de Mello Donegá (Celso)webspace.science.uu.nl/~mello101/
Ingmar Swartdr. I. Swart (Ingmar)www.swartlab.eu
Zeila Zanollidr. Z. Zanolli (Zeila)www.uu.nl/staff/ZZanolli/
Postdocs
dr. L. Chepyga (Liudmyla)www.uu.nl/staff/LChepyga/
dr. V. Derakhshan Maman (Vahid)www.uu.nl/staff/VDerakhshanmaman/
dr. P.M. Monteiro Campos de Melo (Pedro)www.uu.nl/staff/PMMonteiroCamposdeMelo/
dr. A.D. Sontakke (Atul Dnyaneshwar)www.uu.nl/staff/ADSontakke/
dr. M. Suta (Markus)www.uu.nl/staff/MSuta/
PhD-students
J.C. van der Bok (Annelies), MScwww.uu.nl/staff/JCvanderBok/
J.J. van den Broeke (Jette), MScwww.uu.nl/staff/JJvandenBroeke/
A.J. van Bunningen (Naud), MScwww.uu.nl/staff/AJvanBunningen/
S. Busatto (Serena), MScwww.uu.nl/staff/SBusatto/
J.P. Cuperus (Jan), MScwww.uu.nl/staff/JPCuperus/
S.E. Freeney (Saoirsé), MScwww.uu.nl/staff/SEFreeney/
T.S. Gardenier (Thomas), MScwww.uu.nl/staff/TSGardenier/
E.J. van Harten (Elleke), MScwww.uu.nl/staff/EJvanHarten1/
R.A.M. Ligthart (Rian), MScwww.uu.nl/staff/RAMLigthart/
J.R. Moes (Jesper), MScwww.uu.nl/staff/JRMoes/
L.C. Post (Christiaan), MScwww.uu.nl/staff/LCPost/
P.T. Prins (Tim), MScwww.uu.nl/staff/PTPrins/
R. Reho (Riccardo), MScwww.uu.nl/staff/RReho/
B.B.V. Salzmann (Bas), MScwww.uu.nl/staff/BBVSalzmann/
M.M. van der Sluijs (Maaike), MScwww.uu.nl/staff/MMvanderSluijs/
T.P. van Swieten (Thomas), MScwww.uu.nl/staff/TPvanSwieten/
P. Vermeeren (Pascal), MScwww.uu.nl/staff/PVermeeren/
J.F. Vliem (Jara), MScwww.uu.nl/staff/JFVliem/
J.W. de Wit (Jur), MScwww.uu.nl/staff/JWdeWit/
Supporting staff
P.M. van den Beld (Peter)www.uu.nl/staff/PMvandenBeld/
S. Benschop (Silvia)www.uu.nl/staff/SBenschop/
L.W.J. Kumeling (Linda), MAwww.uu.nl/staff/LWJKumeling/
ing. S.J.M. Zevenhuizen (Stephan)webspace.science.uu.nl/~zeven101/
Emeriti
prof. dr. J.J. Kelly (John)www.uu.nl/staff/JJKelly/
prof. dr. H.W. de Wijn (Harold)webspace.science.uu.nl/~wijn0104/
Guests
dr. A.C. Berends (Anne)www.uu.nl/staff/acberends/
dr. O.L.J. Gijzeman (Onno)www.uu.nl/staff/OLJGijzeman/
dr. M.A. van de Haar (Marie Anne)www.uu.nl/staff/MAvandeHaar/
dr. J. Kong (Jiantao)www.uu.nl/staff/JKong/
dr. S. Wakui (Sadakazu)www.uu.nl/staff/SWakui/
dr. L. Wang (Lei)www.uu.nl/staff/LWang1/
dr. C. Xia (Chenghui)www.uu.nl/staff/CXia/
CMI group photo 0 CMI group photo 1 CMI group photo 2 CMI group photo 3

 

Student research projects at CMI

Each year, we welcome more than 15 students from the Netherlands and abroad for their Bachelor or Master internships. Please contact the researcher well ahead of your intended starting date to check the vacancies and possibilities.


 

Publications

A full publication list can be found on the CMI publication list page.


Last update: January 11, 2021