Journal
ACS NANO
Volume 6, Issue 9, Pages 8060-8066Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn302644r
Keywords
graphene oxide; self-assembly; liquid crystals; multiphoton excitation; photoluminescence; nonlinear imaging
Categories
Funding
- NSF [DMR-0645461, DMR-0820579, DMR-0847782]
- AFOSR [FA9550-09-1-0590, FA9550-09-1-0581]
- Welch Foundation [C-1668]
- ICAM Branches Cost Sharing Fund
- AFRL through University Technology Corporation [09-S568-064-01-C1]
- Office of Naval Research Graphene MURI Program [00006766, N00014-09-1-1066]
- Direct For Mathematical & Physical Scien [844115] Funding Source: National Science Foundation
- Division Of Materials Research [844115] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0847782] Funding Source: National Science Foundation
Ask authors/readers for more resources
We report a visible-range nonlinear photoluminescence (PL) from graphene oxide (GO) flakes excited by near-infrared femtosecond laser light. PL intensity has nonlinear dependence on the laser power, implying a multiphoton excitation process, and also strongly depends on a linear polarization orientation of excitation light, being at maximum when it is parallel to flakes. We show that PL can be used for a fully three-dimensional label-free imaging of isotropic, nematic, and lamellar liquid crystalline dispersions of GO flakes in water. This nonlinear PL is of interest for applications in direct label-free imaging of composite materials and study of orientational ordering in mesomorphic phases formed by these flakes, as well as in biomedical and sensing applications utilizing GO.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
