Q-particles: Size quantization effects in colloidal semiconductors

Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 73)


“New Trends in Colliod Science” contains the proceedings of the foundation meeting of the European Colloid and Interface Society (ECIS), October 1–3, 1986. Representatives from the major European groups working in this field contributed to the conference. The volume contains an up-to-date account of present developments in Colloid Science. The contributions cover a wide scope of subjects, and provide encouragement that structures and transport processes in dense colloidal systems can be understood on basic principles. The main subjects are include:
  • phase diagrams of new surfactant systems

  • microemulsions and their applications

  • vesicles and bilayers

  • transport properties of colloidal systems.


Quantum mechanical effects in colloidal particles of semiconductor materials are described (Q-particles). They are observed in the case of extremely small particles (1–10 nm). In these particles the eletronic energy levels experience a transition from semiconductor behavior to molecular behavior. The optical and photocatalytical properties of the particles change with their size in this transition range.

Key words

Q-particles fluorescence photo-catalysis inorganic colloids spectroscopy 


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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1987

Authors and Affiliations

  1. 1.Bereich StrahlenchemieHahn-Meitner-Institut für KernforschungBerlin 39Germany

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