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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
Patterned growth of vertically aligned organic nanowire waveguide arrays
Yong Sheng Zhao1, Peng Zhan, Jaemyung Kim
1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA.
ACS Nano
|February 11, 2010
Summary
Researchers created patterned 1,5-diaminoanthraquinone (DAAQ) nanowire arrays on surfaces with high energy. These nanowires act as optical waveguides and can be used for chemical sensing.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Organic dye compounds offer unique optical properties.
- Nanowire arrays are promising for advanced applications.
- Controlling nanostructure growth is crucial for device fabrication.
Purpose of the Study:
- To develop a method for patterned growth of vertical 1,5-diaminoanthraquinone (DAAQ) nanowire arrays.
- To investigate the use of DAAQ nanowires as optical waveguides.
- To explore the application of these nanowire arrays in chemical vapor sensing.
Main Methods:
- Facile physical vapor transport method for DAAQ nanowire synthesis.
- Surface energy modification (geometric and chemical) of substrates for patterned growth.
- Experimental observation of photoluminescence propagation and waveguide modes.
Main Results:
- DAAQ nanowire growth rate is dependent on substrate surface energy.
- Patterned growth achieved by exploiting surface energy differences.
- DAAQ nanowires exhibit low-loss optical waveguide properties.
- Successful integration with a portable fiber optics spectrometer for sensing.
Conclusions:
- Selective, patterned growth of DAAQ nanowire arrays is feasible.
- DAAQ nanowires function effectively as nanoscale optical waveguides.
- The developed nanowire arrays show potential for portable chemical sensing applications.
