Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting properties
Very small ZnS and CdS crystallites are made and stabilized in aqueous and methanolic media without organic surfactants. Low temperature (−77 °C) synthesis in methanol produces the smallest crystallites, ≈30 Å diameter cubic CdS and <20 Å diameter cubic ZnS. The crystallites are characterized by transmission electron microscopy and in situ optical spectroscopy (λ≳200 nm). The crystallites are too small to exhibit bulk band gaps in their optical spectra. In the band gap region, the small crystallites show a higher energy absorption threshold with a resolved spectral feature (quantum size exciton peak), not present in the spectra of larger crystals. The far ultraviolet spectra are unaffected by size at present resolution. These results can be understood in terms of the crystallite molecular orbitals, and an elementary confined electron and hole model.
Top-30
Citations by journals
5
10
15
20
25
30
|
|
Physical Review B
26 publications, 5.14%
|
|
Chemistry of Materials
17 publications, 3.36%
|
|
Journal of Physical Chemistry B
14 publications, 2.77%
|
|
Journal of Applied Physics
14 publications, 2.77%
|
|
Journal of Luminescence
13 publications, 2.57%
|
|
Journal of Chemical Physics
12 publications, 2.37%
|
|
Thin Solid Films
10 publications, 1.98%
|
|
Materials Chemistry and Physics
9 publications, 1.78%
|
|
MRS Proceedings
9 publications, 1.78%
|
|
Langmuir
8 publications, 1.58%
|
|
Chemical Physics Letters
8 publications, 1.58%
|
|
Materials Research Bulletin
8 publications, 1.58%
|
|
Applied Surface Science
8 publications, 1.58%
|
|
Journal of Physical Chemistry C
8 publications, 1.58%
|
|
Materials Letters
7 publications, 1.38%
|
|
Colloids and Surfaces A: Physicochemical and Engineering Aspects
6 publications, 1.19%
|
|
Applied Physics Letters
6 publications, 1.19%
|
|
Physica Status Solidi (B): Basic Research
6 publications, 1.19%
|
|
Journal of Physics and Chemistry of Solids
5 publications, 0.99%
|
|
Solid State Communications
5 publications, 0.99%
|
|
Nanotechnology
5 publications, 0.99%
|
|
Journal of Materials Chemistry A
5 publications, 0.99%
|
|
The Journal of Physical Chemistry
4 publications, 0.79%
|
|
Inorganic Chemistry
4 publications, 0.79%
|
|
Journal of Crystal Growth
4 publications, 0.79%
|
|
Optical Materials
4 publications, 0.79%
|
|
Applied Physics A: Materials Science and Processing
4 publications, 0.79%
|
|
Physica E: Low-Dimensional Systems and Nanostructures
4 publications, 0.79%
|
|
Chemistry - A European Journal
4 publications, 0.79%
|
|
5
10
15
20
25
30
|
Citations by publishers
20
40
60
80
100
120
140
160
180
|
|
Elsevier
161 publications, 31.82%
|
|
American Chemical Society (ACS)
73 publications, 14.43%
|
|
Springer Nature
40 publications, 7.91%
|
|
Wiley
34 publications, 6.72%
|
|
American Institute of Physics (AIP)
32 publications, 6.32%
|
|
American Physical Society (APS)
30 publications, 5.93%
|
|
Royal Society of Chemistry (RSC)
18 publications, 3.56%
|
|
Taylor & Francis
17 publications, 3.36%
|
|
IOP Publishing
15 publications, 2.96%
|
|
Materials Research Society
9 publications, 1.78%
|
|
Optical Society of America
5 publications, 0.99%
|
|
Trans Tech Publications
5 publications, 0.99%
|
|
Cambridge University Press
4 publications, 0.79%
|
|
IEEE
4 publications, 0.79%
|
|
The Chemical Society of Japan
3 publications, 0.59%
|
|
Multidisciplinary Digital Publishing Institute (MDPI)
3 publications, 0.59%
|
|
Pleiades Publishing
3 publications, 0.59%
|
|
Uspekhi Fizicheskikh Nauk Journal
2 publications, 0.4%
|
|
Physical Society of Japan
2 publications, 0.4%
|
|
Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
2 publications, 0.4%
|
|
Beilstein-Institut
1 publication, 0.2%
|
|
American Vacuum Society
1 publication, 0.2%
|
|
CSIRO Publishing
1 publication, 0.2%
|
|
EDP Sciences
1 publication, 0.2%
|
|
The Electrochemical Society of Japan
1 publication, 0.2%
|
|
Institution of Engineering and Technology (IET)
1 publication, 0.2%
|
|
The Royal Society
1 publication, 0.2%
|
|
World Scientific
1 publication, 0.2%
|
|
The Electrochemical Society
1 publication, 0.2%
|
|
20
40
60
80
100
120
140
160
180
|
- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.