Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator
Balci, F. M.
Journal of Physical Chemistry C
American Chemical Society
11194 - 11200
Item Usage Stats
MetadataShow full item record
Lithium salt (noncoordinating anions, such as lithium triflate (Ltf)) gel electrolytes may be key for the practical use of electrochemical devices. We introduce a new lyotropic liquid-crystalline (LLC) mesophase using Ltf, a small amount of water (as low as 1.3 water per Ltf), and nonionic surfactant (C18H37(OCH2CH2)10OH, C18E10). The LLC phase forms over a broad range of Ltf/C18E10 mole ratios, 2-18. The clear ethanol solution of the ingredients can be either directly spin-coated over a glass substrate to form a gel phase or it can be prepared as a gel by mixing Ltf, water, and C18E10. The mesophase leaches out surfactant molecules at low salt concentrations, but at a salt/surfactant mole ratio of above 8, the phase is homogeneous with a cubic mesostructure, fully transparent in the visible optical region, mechanically flexible, and an effective gel electrolyte. We have observed a large electrostatic doping on graphene with the Fermi energy level of ∼1.0 eV using Ltf-C18E10 gel electrolytes. The Ltf-based gels demonstrate better properties than commonly used ionic liquid electrolyte in graphene optical modulators. The stability of the new gel electrolytes and their superior performance make them suitable electrolytes for use in graphene-based optical modulators.
Optical signal processing
Surface active agents
Ionic liquid electrolytes
Low salt concentration
Lyotropic liquid crystalline
Published Version (Please cite this version)http://dx.doi.org/10.1021/acs.jpcc.7b03622
Showing items related by title, author, creator and subject.
Swollen liquid crystals (SLCs): A versatile template for the synthesis of nano structured materials Dutt, S.; Siril, P. F.; Remita, S. (Royal Society of Chemistry, 2017)Liquid crystal (LCs) is the state of matter that exhibits properties between a conventional liquid and solid crystals. Liquid crystals mainly can be classified into two types: thermotropic and lyotropic liquid crystals. A ...
Hogan B.T.; Kovalska E.; Craciun M.F.; Baldycheva A. (Royal Society of Chemistry, 2017)The merging of the materials science paradigms of liquid crystals and 2D materials promises superb new opportunities for the advancement of the fields of optoelectronics and photonics. In this review, we summarise the ...
Oltulu, O.; Mamedov, A. M.; Özbay, Ekmel (Springer Verlag, 2017)The vast majority of acoustic wave propagation in phononic band studies has been usually carried out by scattering inclusions embedded in a viscoelastic medium, such as air or water. In this study, we present calculated ...