English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Kinetics and particle formation mechanism of zinc oxide particles in polymer-controlled precipitation from aqueous solution

MPS-Authors
/persons/resource/persons48846

Taubert,  A.
MPI for Polymer Research, Max Planck Society;

/persons/resource/persons47939

Glasser,  G.
MPI for Polymer Research, Max Planck Society;

/persons/resource/persons48544

Palms,  D.
MPI for Polymer Research, Max Planck Society;

External Resource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Taubert, A., Glasser, G., & Palms, D. (2002). Kinetics and particle formation mechanism of zinc oxide particles in polymer-controlled precipitation from aqueous solution. Langmuir, 18(11), 4488-4494.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-65EC-E
Abstract
The morphogenesis, particle size, size distribution, and phase evolution of zinc oxide precipitated in the presence of water- soluble poly(ethylene oxide-block-methacrylic acid) (P(EO-b- MAA)) and poly(ethylene oxide-block-styrene sulfonic acid) (P(EO-b-SSH)) diblock copolymers is reported. Without a polymeric additive, spindlelike particles with a central grain boundary form along with multiply twinned particles. After similar to30 min, the multiple twins are gone, small, needlelike crystals appear, and the sample becomes more polydisperse. With P(EO-b-MAA) copolymers, initially more rounded particles with the same central grain boundary and a narrow size distribution form. They preferentially grow along the crystallographic c-axis and eventually adopt a hexagonal prismatic shape. With P(EO-b-SSH) copolymers, a lamellar intermediate precipitates first. It eventually dissolves and hexagonal prismatic crystals form; in a subsequent growth process unique to these polymeric additives, the crystals grow along the crystallographic a-axis and transform to another morphology termed the "stack of pancakes" shape. Both in the absence of polymer and with P(EO-b-MAA) copolymers, multiple particle generations precipitate. With P(EO-b-SSH) copolymers, no second generation is observed. Nucleation is delayed by the P(EO-b-MAA) copolymers, while P(EOb-SSH) copolymers favor the rapid nucleation of the highly ordered lamellar intermediate.