By Allen J. Bard, Zhifeng Ding, Noseung Myung (auth.), X. Peng, D. M. P. Mingos (eds.)
"Studies of semiconductor nanocrystals stay a key part within the repertoire of fabrics chemistry. As those fabrics get pleasure from sustained relevance to functions in optoelectronic fabrics and organic labeling, up to date, in-depth studies in their basic houses remain a precious source to these attracted to the field.
...this quantity within the longstandingStructure and Bonding sequence is an invaluable compilation of updated reports relating to semiconductor nanocrystals, specially these of the often-studied II-VI style. It additionally maintains its culture of selecting revered scientists within the box that produce lucid papers of value."
from: Jeffery L. Coffer, Texas Christian collage, J. Am. Chem. Soc. 2006, 128, 9258
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Extra info for Semiconductor nanocrystals and silicate nanoparticles
However, there is only one study on the electrochemical properties of Ge NCs . Fig. 1 M TBAP. The Ge NCs used were synthesized by the arrested-growth method in supercritical octanol. 5 nm and capped with an organic layer of C8 hydrocarbon chains bound through an alkoxide layer . 0 V/s. Several important features were observed. First, electrogenerated reduced species are more stable than oxidized ones, as indicated by the relative ECL light intensity. Also, a relatively sharp peak was observed in the potential region where oxidized forms are electrogenerated, implying differences in the generation kinetics of the charged species.
In addition, ECL depends more sensitively on surface states than PL, which mainly occurs through excitation and emission within the NCs core . NC cores have band gaps greater than the energy separation of surface states. Considering all of these factors and the non-zero tail in the PL spectrum shown in Fig. 18, the difference in light emission spectra between ECL and PL most likely results from a major contribution of the surface states in ECL emission. This result suggests the importance of surface passivation studies on ECL.
725 V 100% bleaching of the ﬁrst exciton is observed. This corresponds to the ﬁlling of the 1Se state in all of the QDs in the ﬁlm. For this sample, the bleach of the ﬁrst exciton due to hole injection plateaus at ∼ 90%. The application of more positive potentials causes irreversible changes to the ﬁlm. The voltammetry shows a much more reversible feature for the reduction than for the oxidation, consistent with the lower stability of the injected hole. 2 nm-diameter PbSe NCs; however, for those dots, hole injection bleached the ﬁrst exciton by ∼ 75%.