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A New View on Chemistry of Solids in Solution‐Cryo Energy‐Filtered Transmission Electron Microscopy (Cryo‐EFTEM) Imaging of Aggregating Palladium Colloids in Vitreous Ice
Author(s) -
Bovin JanOlov,
Huber Torsten,
Balmes Olivier,
Malm JanOlle,
Karlsson Gunnel
Publication year - 1999
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(20000103)6:1<129::aid-chem129>3.0.co;2-y
Subject(s) - transmission electron microscopy , colloid , cryo electron microscopy , palladium , nanoparticle , ionic bonding , materials science , electron microscope , nanotechnology , microscopy , chemical engineering , chemistry , optics , ion , physics , organic chemistry , catalysis , engineering , biochemistry
It is shown that by using cryo‐transmission electron microscopy (cryo‐TEM) it is possible to image the aggregation behaviour of nanoparticles while they are still in solution. This technique has allowed the study of the arrangement of colloidal palladium particles in solution by preparing the specimen by the plunge‐freezing technique. This method of rapidly cooling the specimen avoids rearrangement of the particles during specimen preparation. The palladium particles were identified by energy‐filtered cryo‐TEM. The aggregation of particles in solution was studied as a function of pH and ionic strength. The results can be used as recommendations for colloidal solutions intended for deposition of single particles.