Peukert W, Segets D (2015)
Publication Language: English
Publication Status: Published
Publication Type: Authored book, other
Publication year: 2015
Publisher: Springer International Publishing
Series: Colloid Process Engineering
Book Volume: II
Pages Range: 279-305
ISBN: 9783319151281
DOI: 10.1007/978-3-319-15129-8_12
In the following chapter fundamental aspects that have to be considered during the processing of small nanoparticles will be addressed. We investigated quantum confined manganese doped ZnS, ZnO, PbS and PbSe semiconductor nanoparticles, so-called quantum dots (QDs) and silver noble metal nanorods. All materials were chosen due to their technical relevance for future applications in the emerging fields of solar cells, sensors and diagnostics as well as due to the possibility of their in situ characterization by UV/Vis absorbance spectroscopy. After a brief introduction to the specific prospects and challenges of these materials we will focus on the important processing issues that need to be solved for producing these particles at high quality on a larger scale: (i) the modelling of particle formation including nucleation, growth and ripening based on a mechanistic understanding and on experimentally derived data on solubility and surface energies, (ii) the stabilization of nanoparticles not only against agglomeration but also against shape changes and (iii) classification. The latter is realized by size selective precipitation which allows surprisingly sharp separations (κ= 0.75) of particles with only a few nm in diameter. Although the extremely small particle sizes (feed PSD between 1.5 and 3 nm), classification results were successfully analyzed by well-known concepts from particle technology. Our results are seen to be an essential contribution to colloidal processing. They enable a future optimization of process parameters by a knowledge-based design strategy that can be applied within continuous as well as automatized batch reactor concepts.
APA:
Peukert, W., & Segets, D. (2015). Process engineering of nanoparticles below 20 nm—a fundamental discussion of characterization, particle formation, stability and post processing. Springer International Publishing.
MLA:
Peukert, Wolfgang, and Doris Segets. Process engineering of nanoparticles below 20 nm—a fundamental discussion of characterization, particle formation, stability and post processing. Springer International Publishing, 2015.
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