« Foundry Home Page
Molecular Self-Assembly in a Poorly Screened Environment: F4TCNQ on Graphene/BN
Using the Molecular Foundry, researchers show that charged molecules that would normally repel one another have been observed to attract each other on graphene due to a novel self-assembly mechanism
Significance and Impact
A new self-assembly mechanism should apply to other charged molecular systems involving 2D materials and provides a new route to engineer useful nanostructures
- Charged F4TCNQ molecules were observed to form tightly packed molecular islands on graphene supported by boron nitride.
- Atomic force microscopy was used to investigate the atomic-scale structure of 2D molecular islands on graphene.
- Molecular island formation was explained by a novel self-assembly mechanism for charged molecules in a poorly screened environ- ment where nanoscale work function heterogeneity exists.
H.-Z. Tsai, A. A. Omrani, S. Coh, H. Oh, S. Wickenburg, Y.-W. Son, D. Wong, A. Riss, H. S. Jung, G. D Nguyen, G. F. Rodgers, A. S. Aikawa, T. Taniguchi, K. Watanabe, A. Zettl, S. G. Louie, J. Lu, M. L. Cohen, M. F. Crommie, ACS Nano (2015) DOI: 10.1021/acsnano.5b05322