pH dependent isotropic to nematic phase transitions in graphene oxide dispersions reveal droplet liquid crystalline phases.
Size fractionation, amplified by the surface charge density of graphene oxide (GO) sheets, broadens the pH dependent isotropic (I) to nematic (N) phase transition in aqueous dispersions of graphene oxide (GO). In this biphasic region, a highly organized droplet nematic phase of uniform size (20 ± 2.8 μm diameter) with an isotropic interior is observed.
Nanoscale Science and Engineering Laboratory (NSEL), Mechanical and Aerospace Engineering Department, Monash University, Clayton, VIC 3800, Australia. mainak.majumder@monash.edu.
Rachel
R
Tkacz
Rudolf
R
Oldenbourg
Shalin B
SB
Mehta
Morteza
M
Miansari
Amitabh
A
Verma
Mainak
M
Majumder
D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D050866:Liquid Crystals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D044367:Phase Transition; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D013816:Thermodynamics
D010087:Oxides; D012997:Solvents; D006108:Graphite