Three-dimensional patterning of solid microstructures through laser reduction of colloidal graphene oxide in liquid-crystalline dispersions
- Univ. of Colorado, Boulder, CO (United States). Dept. of Physics; Rice Univ., Houston, TX (United States). Dept. of Chemical and Biomolecular Engineering
- Rice Univ., Houston, TX (United States). Dept. of Chemical and Biomolecular Engineering
- Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
- Rice Univ., Houston, TX (United States). R.E. Smalley Inst. for Nanoscale Science and Technology
- R.E. Smalley Inst. for Nanoscale Science and Technology
- Univ. of Colorado, Boulder, CO (United States). Dept. of Physics; Univ. of Colorado, Boulder, CO (United States). Liquid Crystal Materials Center; National Renewable Energy Lab. (NREL), Golden, CO (United States). Renewable and Sustainable Energy Inst.
Graphene materials and structures have become an essential part of modern electronics and photovoltaics. However, despite many production methods, applications of graphene-based structures are hindered by high costs, lack of scalability and limitations in spatial patterning. Here we fabricate three-dimensional functional solid microstructures of reduced graphene oxide in a lyotropic nematic liquid crystal of graphene oxide flakes using a pulsed near-infrared laser. This reliable, scalable approach is mask-free, does not require special chemical reduction agents, and can be implemented at ambient conditions starting from aqueous graphene oxide flakes. Orientational ordering of graphene oxide flakes in self-assembled liquid-crystalline phases enables laser patterning of complex, three-dimensional reduced graphene oxide structures and colloidal particles, such as trefoil knots, with ‘frozen’ orientational order of flakes. These structures and particles are mechanically rigid and range from hundreds of nanometres to millimetres in size, as needed for applications in colloids, electronics, photonics and display technology.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC36-08GO28308; SC0010305
- OSTI ID:
- 1220791
- Alternate ID(s):
- OSTI ID: 1595145
- Report Number(s):
- NREL/JA-5900-64592
- Journal Information:
- Nature Communications, Vol. 6; Related Information: Nature Communications; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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