TY - JOUR
T1 - From transparent to structural white
T2 - Modulating nanoscale self-assembly in silica and nanocellulose composites
AU - Raghuwanshi, Vikram Singh
AU - Vir, Anil B.
AU - Lin, Maoqi
AU - Garnier, Gil
N1 - Funding Information:
Financial support is from Australian Research Council (ARC) , Australian paper , Carter Holt Harvey , Circa , Norske Skog , Orora , and Visy through the Industry Transformation Research Hub grant IH130100016 . The authors thank to Dr. Nigel Kirby and Stephen Mude beamline scientists of SAXS/WAXS beamline at the Australian Synchrotron for assistance during measurement. Authors thank to the Australian Nuclear Science and Technology Organisation (ANSTO) for providing beamtime (Proposal ID: 16263).
Funding Information:
Financial support is from Australian Research Council (ARC), Australian paper, Carter Holt Harvey, Circa, Norske Skog, Orora, and Visy through the Industry Transformation Research Hub grant IH130100016. The authors thank to Dr. Nigel Kirby and Stephen Mude beamline scientists of SAXS/WAXS beamline at the Australian Synchrotron for assistance during measurement. Authors thank to the Australian Nuclear Science and Technology Organisation (ANSTO) for providing beamtime (Proposal ID: 16263).
Publisher Copyright:
© 2023 The Authors
PY - 2023/10/20
Y1 - 2023/10/20
N2 - The opaque white and glossy structural color of composite films made of cellulose nanorod crystals (CNC) and silica (SiO2) nanospheres is elucidated by the formation of nanoscale self-assembled domains. Films of pure CNC and SiO2 made by evaporation induced self-assembling are transparent. Surprisingly, composite films of CNC-SiO2 (50:50) with high silica content are opaque, white and glossy. High photon flux SAXS combined with SEM reveal the formation of CNC and SiO2 self-assembled domains having different interparticle interactions and distances. The opaqueness, white color and transparency of the films are all explained by the multiple scattering and diffuse reflection of the incident light from the structural domains of CNC, SiO2 and CNC-SiO2. Understanding the self-assembly mechanisms of nanostructures enable efficiently engineer composites of functional optical properties for applications such as in sensors and bio-diagnostics.
AB - The opaque white and glossy structural color of composite films made of cellulose nanorod crystals (CNC) and silica (SiO2) nanospheres is elucidated by the formation of nanoscale self-assembled domains. Films of pure CNC and SiO2 made by evaporation induced self-assembling are transparent. Surprisingly, composite films of CNC-SiO2 (50:50) with high silica content are opaque, white and glossy. High photon flux SAXS combined with SEM reveal the formation of CNC and SiO2 self-assembled domains having different interparticle interactions and distances. The opaqueness, white color and transparency of the films are all explained by the multiple scattering and diffuse reflection of the incident light from the structural domains of CNC, SiO2 and CNC-SiO2. Understanding the self-assembly mechanisms of nanostructures enable efficiently engineer composites of functional optical properties for applications such as in sensors and bio-diagnostics.
KW - Cellulose nanocrystals (CNC)
KW - Composites
KW - Nanocellulose
KW - Scanning electron microscopy (SEM)
KW - Self-assembly
KW - Silica (SiO)
KW - Small angle X-ray scattering (SAXS)
KW - Structure colour
KW - White colour
UR - http://www.scopus.com/inward/record.url?scp=85165006058&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2023.131999
DO - 10.1016/j.colsurfa.2023.131999
M3 - Article
AN - SCOPUS:85165006058
SN - 0927-7757
VL - 675
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 131999
ER -