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Cover Picture: ZAAC ‐ Journal of Inorganic and General Chemistry 6/2013
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201390014
Subject(s) - nanoparticle , nucleation , cover (algebra) , particle size , phase (matter) , chemistry , nanotechnology , chemical engineering , materials science , computer science , organic chemistry , engineering , mechanical engineering
The cover picture shows a multi‐step reaction of In 0 nanoparticles. In detail the sequence of reactions includes: 1. NaBH 4 ‐driven reduction of InCl 3 · 4H 2 O in diethylene glycol (DEG) as a polar phase; 2. Nucleation of In 0 nanoparticles with DEG as a surface capping; 3. Oleylamine‐driven phase‐transfer of the initial In 0 nanoparticles from the polar DEG phase to a non‐polar dodecane phase; 4. Separation of the In 0 nanoparticles from remaining starting materials and stabilization in view of agglomeration and reoxidation; 5. Controlled oxidation of In 0 to In 2 O 3 based on Laux ‐type conditions applying nitrobenzene as a mild oxidizing agent.As it is in principle not a surprise that In 0 can be oxidized to In 2 O 3 , the challenge of the multi‐step reaction is to retain the colloidal stability, particle size and size distribution of the nanoparticles at any time. With mean diameters of 11(1) nm for the initial In 0 and 14(2) nm for the resulting In 2 O 3 , this is indeed the case. Altogether, such multistep reactions under kinetic reaction control – similar to the multi‐step modification of functional groups of organic molecules – meanwhile become available also for inorganic solids.More details are discussed in the article by Hammarberg and Feldmann on pp. 887 ff.