Details
| Original language | English |
|---|---|
| Pages (from-to) | 23720-23727 |
| Number of pages | 8 |
| Journal | Journal of Physical Chemistry C |
| Volume | 122 |
| Issue number | 41 |
| Early online date | 24 Sept 2018 |
| Publication status | Published - 18 Oct 2018 |
Abstract
We study temperature-dependent charge transport in two-dimensional assemblies of copper sulfide nanodiscs in the covellite crystal phase (Cu1.1S). To enhance interparticle coupling, we cross-link the nanocrystals with the organic π-system Cu-4,4′,4″,4‴-tetraaminophthalocyanine and observe an increase in the conductivity by 6 orders of magnitude. The electrical properties of monolayers of this hybrid ensemble are consistent with a two-dimensional semiconductor and exhibit two abrupt changes at discrete temperatures (120 and 210 K), which may be interpreted as phase changes. X-ray scattering experiments serve to study the importance of electronic conjugation in the organic π-system vs interparticle spacing for efficient charge transport. Applying the hybrid ensemble as a chemiresistor in organic vapor sensing experiments reveals a strong selectivity between polar and nonpolar analytes, which we discuss in light of the role of the organic π-system and its metal center.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- General Energy
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Journal of Physical Chemistry C, Vol. 122, No. 41, 18.10.2018, p. 23720-23727.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electronically Coupled, Two-Dimensional Assembly of Cu1.1S Nanodiscs for Selective Vapor Sensing Applications
AU - Maiti, Sonam
AU - Maiti, Santanu
AU - Joseph, Yvonne
AU - Wolf, Andreas
AU - Brütting, Wolfgang
AU - Dorfs, Dirk
AU - Schreiber, Frank
AU - Scheele, Marcus
N1 - Funding information: The authors acknowledge the DFG for support under Grants SCHE1905/3, SCHE1905/4, BR1728/18, and SCHR700/25. We also thank Mrs. Elke Nadler, Institute of Physical and Theoretical Chemistry, University of Tübingen, for performing SEM/STEM measurements using a Hitachi SU 8030 SEM which was partially funded by the DFG under Contract INST 37/829-1 FUGG. Mahdi Samadi Khoshkhoo is gratefully acknowledged for help with vapor sensing measurements.
PY - 2018/10/18
Y1 - 2018/10/18
N2 - We study temperature-dependent charge transport in two-dimensional assemblies of copper sulfide nanodiscs in the covellite crystal phase (Cu1.1S). To enhance interparticle coupling, we cross-link the nanocrystals with the organic π-system Cu-4,4′,4″,4‴-tetraaminophthalocyanine and observe an increase in the conductivity by 6 orders of magnitude. The electrical properties of monolayers of this hybrid ensemble are consistent with a two-dimensional semiconductor and exhibit two abrupt changes at discrete temperatures (120 and 210 K), which may be interpreted as phase changes. X-ray scattering experiments serve to study the importance of electronic conjugation in the organic π-system vs interparticle spacing for efficient charge transport. Applying the hybrid ensemble as a chemiresistor in organic vapor sensing experiments reveals a strong selectivity between polar and nonpolar analytes, which we discuss in light of the role of the organic π-system and its metal center.
AB - We study temperature-dependent charge transport in two-dimensional assemblies of copper sulfide nanodiscs in the covellite crystal phase (Cu1.1S). To enhance interparticle coupling, we cross-link the nanocrystals with the organic π-system Cu-4,4′,4″,4‴-tetraaminophthalocyanine and observe an increase in the conductivity by 6 orders of magnitude. The electrical properties of monolayers of this hybrid ensemble are consistent with a two-dimensional semiconductor and exhibit two abrupt changes at discrete temperatures (120 and 210 K), which may be interpreted as phase changes. X-ray scattering experiments serve to study the importance of electronic conjugation in the organic π-system vs interparticle spacing for efficient charge transport. Applying the hybrid ensemble as a chemiresistor in organic vapor sensing experiments reveals a strong selectivity between polar and nonpolar analytes, which we discuss in light of the role of the organic π-system and its metal center.
UR - http://www.scopus.com/inward/record.url?scp=85054865925&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.8b05276
DO - 10.1021/acs.jpcc.8b05276
M3 - Article
AN - SCOPUS:85054865925
VL - 122
SP - 23720
EP - 23727
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 41
ER -