The development of chiral nematic mesoporous materials

JA Kelly, M Giese, KE Shopsowitz… - Accounts of chemical …, 2014 - ACS Publications
Conspectus Cellulose nanocrystals (CNCs) are obtained from the sulfuric acid-catalyzed
hydrolysis of bulk cellulose. The nanocrystals have diameters of∼ 5–15 nm and lengths of∼ …

Flexible and iridescent chiral nematic mesoporous organosilica films

KE Shopsowitz, WY Hamad… - Journal of the American …, 2012 - ACS Publications
Nanocrystalline cellulose (NCC) has been used to template ethylene-bridged mesoporous
organosilica films with long-range chirality and photonic properties. The structural color of …

Chiral nematic mesoporous carbon derived from nanocrystalline cellulose

KE Shopsowitz, WY Hamad, MJ MacLachlan - Angewandte Chemie …, 2011 - infona.pl
Twisted organization: Pyrolysis of nanocrystalline cellulose (NCC)/silica composite films
leads to mesoporous carbon materials with long‐range chiral organization (see picture). The …

Chiral nematic stained glass: controlling the optical properties of nanocrystalline cellulose-templated materials

JA Kelly, KE Shopsowitz, JM Ahn, WY Hamad… - Langmuir, 2012 - ACS Publications
Chiral nematic mesoporous materials decorated with metal nanoparticles have been
prepared using the templated self-assembly of nanocrystalline cellulose (NCC). By adding …

Chiral nematic assemblies of silver nanoparticles in mesoporous silica thin films

H Qi, KE Shopsowitz, WY Hamad… - Journal of the …, 2011 - ACS Publications
Silver nanoparticles (NPs) have been synthesized inside mesoporous silica films with chiral
nematic structure. Circular dichroism measurements of the silver NP-loaded silica films show …

Biopolymer templated glass with a twist: controlling the chirality, porosity, and photonic properties of silica with cellulose nanocrystals

KE Shopsowitz, JA Kelly, WY Hamad… - Advanced Functional …, 2014 - Wiley Online Library
A detailed investigation of the formation and properties of mesoporous silica templated by
the chiral nematic liquid crystal phase of cellulose nanocrystals (CNCs) is presented. Under …

Tuning the iridescence of chiral nematic cellulose nanocrystals and mesoporous silica films by substrate variation

TD Nguyen, WY Hamad, MJ MacLachlan - Chemical Communications, 2013 - pubs.rsc.org
We have discovered that the self-assembly of cellulose nanocrystals (CNCs) into chiral
nematic phases varies significantly with the substrate and evaporation rate. These variables …

Flexible mesoporous photonic resins with tunable chiral nematic structures.

MK Khan, M Giese, M Yu, JA Kelly… - Angewandte …, 2013 - search.ebscohost.com
Coloration in nature plays essential roles in signaling, mimicry, or mate choice.[1, 2] The
striking color of a number of mussels, insect shells [3](eg, beetles, see Figure 1a), and bird …

Free-standing mesoporous silica films with tunable chiral nematic structures

KE Shopsowitz, H Qi, WY Hamad, MJ MacLachlan - Nature, 2010 - nature.com
Chirality at the molecular level is found in diverse biological structures, such as
polysaccharides, proteins and DNA, and is responsible for many of their unique properties …

[HTML][HTML] Cellulose nanocrystal-based materials: from liquid crystal self-assembly and glass formation to multifunctional thin films

JPF Lagerwall, C Schütz, M Salajkova, JH Noh… - NPG Asia …, 2014 - nature.com
Cellulose nanocrystals (CNCs), produced by the acid hydrolysis of wood, cotton or other
cellulose-rich sources, constitute a renewable nanosized raw material with a broad range of …