Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Nanoparticle self-assembly at the interface of liquid crystal droplets
Date
2015-04-28
Author
Rahimi, Mohammad
Roberts, Tyler F
Armas-Pérez, Julio C
Wang, Xiaoguang
Büküşoğlu, Emre
Abbott, Nicholas L
de Pablo, Juan Jose
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
203
views
0
downloads
Cite This
Nanoparticles adsorbed at the interface of nematic liquid crystals are known to form ordered structures whose morphology depends on the orientation of the underlying nematic field. The origin of such structures is believed to result from an interplay between the liquid crystal orientation at the particles' surface, the orientation at the liquid crystal's air interface, and the bulk elasticity of the underlying liquid crystal. In this work, we consider nanoparticle assembly at the interface of nematic droplets. We present a systematic study of the free energy of nanoparticle-laden droplets in terms of experiments and a Landau-de Gennes formalism. The results of that study indicate that, even for conditions under which particles interact only weakly at flat interfaces, particles aggregate at the poles of bipolar droplets and assemble into robust, quantized arrangements that can be mapped onto hexagonal lattices. The contributions of elasticity and interfacial energy corresponding to different arrangements are used to explain the resulting morphologies, and the predictions of the model are shown to be consistent with experimental observations. The findings presented here suggest that particle-laden liquid crystal droplets could provide a unique and versatile route toward building blocks for hierarchical materials assembly.
Subject Keywords
Multidisciplinary
URI
https://hdl.handle.net/11511/40928
Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
DOI
https://doi.org/10.1073/pnas.1422785112
Collections
Department of Chemical Engineering, Article
Suggestions
OpenMETU
Core
Optical and mechanical properties of fiber-reinforced ceramic matrix optically transparent composites
Dericioğlu, Arcan Fehmi (2001-12-01)
The idea of increasing the fracture resistance of optically transparent Ceramics by incorporation of continuous fibers with a small expense in their light transmission was applied to a SiC (SCS-6) fiber-reinforced magnesium aluminate spinel matrix composite. It was found that although there is a slight decrease in the light transmittance of the transparent monolithic matrix with increasing fiber volume fraction, a fail-safe mechanism appeared in the composite by the bridging effect of the intact fibers
Blue-phase liquid crystal droplets
Martinez-Gonzalez, Jose A.; Zhou, Ye; Rahimi, Mohammad; Büküşoğlu, Emre; Abbott, Nicholas L; de Pablo, Juan Jose (Proceedings of the National Academy of Sciences, 2015-10-27)
Blue phases of liquid crystals represent unique ordered states of matter in which arrays of defects are organized into striking patterns. Most studies of blue phases to date have focused on bulk properties. In this work, we present a systematic study of blue phases confined into spherical droplets. It is found that, in addition to the so-called blue phases I and II, several new morphologies arise under confinement, with a complexity that increases with the chirality of the medium and with a nature that can ...
Novel topological nodal lines and exotic drum-head-like surface states in synthesized CsCl-type binary alloy TiOs
Wang, Xiaotian; Ding, Guangqian; Cheng, Zhenxiang; Surucu, Gokhan; Wang, Xiao-Lin; Yang, Tie (Elsevier BV, 2020-03-01)
Very recently, searching for new topological nodal line semimetals (TNLSs) and drum-head-like (DHL) surface states has become a hot topic in the field of physical chemistry of materials. Via first principles, in this study, a synthesized CsCl type binary alloy, TiOs, was predicted to be a TNLS with three topological nodal lines (TNLs) centered at the X point in the k(x/y/z) = pi plane, and these TNLs, which are protected by mirror, time reversal (T) and spatial inversion (P) symmetries, are perpendicular to...
Self-reporting and self-regulating liquid crystals
Kim, Young-Ki; Wang, Xiaoguang; Mondkar, Pranati; Büküşoğlu, Emre; Abbott, Nicholas L. (Springer Science and Business Media LLC, 2018-05-24)
Liquid crystals (LCs) are anisotropic fluids that combine the long-range order of crystals with the mobility of liquids(1,2). This combination of properties has been widely used to create reconfigurable materials that optically report information about their environment, such as changes in electric fields (smart-phone displays)(3), temperature (thermometers)(4) or mechanical shear(5), and the arrival of chemical and biological stimuli (sensors)(6,7). An unmet need exists, however, for responsive materials t...
Atmospheric iridium at the South Pole as a measure of the meteoritic component
Tuncel, Süleyman Gürdal (Springer Science and Business Media LLC, 1987-10)
The measurement of iridium (Ir) in atmospheric samples is important because it gives information on the short-term flux of extraterrestrial material without interference from fragmentation products from large bodies. Such information cannot be obtained from sediment samples, because sediment samples integrate over millions of years and include contributions of large bodies impacted in that time period. In addition to flux information, through the analysis of Ir in atmospheric samples we can also evaluate a ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. Rahimi et al., “Nanoparticle self-assembly at the interface of liquid crystal droplets,”
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
, pp. 5297–5302, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40928.