Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001)
Abstract
Visualizing molecular crystalline domains and influence of substrate defects are important in understanding the charge transport in organic thin film devices. Vacuum evaporated tetracene films of four monolayers on hydrogen-terminated Si(001)-2x1 substrate, as a prototypical system, have been studied with ex situ atomic force microscopy (AFM), transverse shear microscopy (TSM), friction force microscopy (FFM), and low-energy electron microscopy (LEEM). Two differently oriented in-plane lattice domains are found due to the symmetry of the substrate lattice, with no visible azimuthal twist between adjacent molecular layers in surface islands, indicating significant bulk-like crystallization in the film. Meanwhile, two types of subdomains are observed inside of each in-plane lattice domain. The subdomains are anisotropic in shape, and their sizes and distribution are highly influenced by the substrate atomic steps. TSM and FFM measurements indicate that these subdomains result from molecule-tilt orderings within the bulk-like lattice domains. Lastly, TSM evidently shows a sensitivity to probe vertical molecule-tilt anisotropy for the molecular crystals, in addition to its known ability to map the lateral lattice orientations.
- Authors:
-
- Univ. of Guelph, ON (Canada). Guelph-Waterloo Physics Inst., Dept. of Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1349595
- Report Number(s):
- BNL-113745-2017-JA
Journal ID: ISSN 0370-1972; R&D Project: 16083/16083; KC0403020
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physica Status Solidi B. Basic Solid State Physics
- Additional Journal Information:
- Journal Volume: 254; Journal Issue: 7; Journal ID: ISSN 0370-1972
- Publisher:
- Wiley-Blackwell
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; boundaries; domains; tetracene; microscopy; microstructures; organic semiconductors; thin films
Citation Formats
Tersigni, Andrew, Sadowski, Jerzy T., and Qin, Xiao-Rong. Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001). United States: N. p., 2017.
Web. doi:10.1002/pssb.201600777.
Tersigni, Andrew, Sadowski, Jerzy T., & Qin, Xiao-Rong. Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001). United States. https://doi.org/10.1002/pssb.201600777
Tersigni, Andrew, Sadowski, Jerzy T., and Qin, Xiao-Rong. Mon .
"Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001)". United States. https://doi.org/10.1002/pssb.201600777. https://www.osti.gov/servlets/purl/1349595.
@article{osti_1349595,
title = {Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001)},
author = {Tersigni, Andrew and Sadowski, Jerzy T. and Qin, Xiao-Rong},
abstractNote = {Visualizing molecular crystalline domains and influence of substrate defects are important in understanding the charge transport in organic thin film devices. Vacuum evaporated tetracene films of four monolayers on hydrogen-terminated Si(001)-2x1 substrate, as a prototypical system, have been studied with ex situ atomic force microscopy (AFM), transverse shear microscopy (TSM), friction force microscopy (FFM), and low-energy electron microscopy (LEEM). Two differently oriented in-plane lattice domains are found due to the symmetry of the substrate lattice, with no visible azimuthal twist between adjacent molecular layers in surface islands, indicating significant bulk-like crystallization in the film. Meanwhile, two types of subdomains are observed inside of each in-plane lattice domain. The subdomains are anisotropic in shape, and their sizes and distribution are highly influenced by the substrate atomic steps. TSM and FFM measurements indicate that these subdomains result from molecule-tilt orderings within the bulk-like lattice domains. Lastly, TSM evidently shows a sensitivity to probe vertical molecule-tilt anisotropy for the molecular crystals, in addition to its known ability to map the lateral lattice orientations.},
doi = {10.1002/pssb.201600777},
journal = {Physica Status Solidi B. Basic Solid State Physics},
number = 7,
volume = 254,
place = {United States},
year = {Mon Mar 27 00:00:00 EDT 2017},
month = {Mon Mar 27 00:00:00 EDT 2017}
}
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