Ultrathin polymer gel-infiltrated monolayer colloidal crystal films for rapid colorimetric chemical sensing

AbstractColloidal crystals have been attracting much attention due to their novel use as 3D-photonic crystals and to their structural color. We have been developing a method for the colloidal crystal growth of opal films immersed in silicone oil. This method is one of the evaporative self-assembly techniques for opal films from colloidal particle suspensions. Understanding the mechanism of the process is important to assure the coating of high-quality opal thin films. The colloidal crystallization from suspension was observed with a long working distance optical microscope and Bragg's diffraction peaks were measured with a miniature fiber optic spectrometer. The transition from a non-crystalline to a crystalline phase is observed within a region between the disordered colloidal suspension and the colloidal crystal film. Within this region, that spans a distance of about 400μm, the lattice of the colloidal crystal reduces until it transitions to the close-packed structure.

Download Full-text

Selective Chemical Sensing Using Structurally Colored Core-Shell Colloidal Crystal Films

IEEE Sensors Journal ◽

10.1109/jsen.2008.923191 ◽

2008 ◽

Vol 8 (6) ◽

pp. 815-822 ◽

Cited By ~ 34

Author(s):

Radislav A. Potyrailo ◽

Zhebo Ding ◽

Matthew D. Butts ◽

Sarah E. Genovese ◽

Tao Deng

Keyword(s):

Chemical Sensing ◽

Colloidal Crystal ◽

Core Shell ◽

Crystal Films ◽

Selective Chemical

Download Full-text

Photonic Crystal Films: Functionalized Mesoporous Photonic Crystal Film for Ultrasensitive Visual Detection and Effective Removal of Mercury (II) Ions in Water (Adv. Funct. Mater. 9/2021)

Advanced Functional Materials ◽

10.1002/adfm.202170061 ◽

2021 ◽

Vol 31 (9) ◽

pp. 2170061

Author(s):

Donghui Kou ◽

Wei Ma ◽

Shufen Zhang

Keyword(s):

Photonic Crystal ◽

Visual Detection ◽

Crystal Film ◽

Effective Removal ◽

Crystal Films

Download Full-text

Soft Janus Colloidal Crystal Film

Angewandte Chemie International Edition ◽

10.1002/anie.201204358 ◽

2012 ◽

Vol 51 (39) ◽

pp. 9809-9813 ◽

Cited By ~ 39

Author(s):

Syuji Fujii ◽

Michael Kappl ◽

Hans-Jürgen Butt ◽

Tatsuya Sugimoto ◽

Yoshinobu Nakamura

Keyword(s):

Colloidal Crystal ◽

Crystal Film

Download Full-text

Preceramic core-shell particles for the preparation of hybrid colloidal crystal films by melt-shear organization and conversion into porous ceramics

Materials & Design ◽

10.1016/j.matdes.2018.10.032 ◽

2018 ◽

Vol 160 ◽

pp. 926-935 ◽

Cited By ~ 6

Author(s):

Steffen Vowinkel ◽

Anna Boehm ◽

Timmy Schäfer ◽

Torsten Gutmann ◽

Emanuel Ionescu ◽

...

Keyword(s):

Colloidal Crystal ◽

Porous Ceramics ◽

Core Shell ◽

Crystal Films ◽

Shell Particles

Download Full-text

Single Crystal Zirconia Thin Films from Liquid Precursors

MRS Proceedings ◽

10.1557/proc-155-191 ◽

1989 ◽

Vol 155 ◽

Cited By ~ 9

Author(s):

K. T. Miller ◽

F. F. Lange

Keyword(s):

Single Crystal ◽

Lattice Mismatch ◽

Lattice Parameter ◽

Precursor Film ◽

Yttrium Nitrate ◽

X Ray Diffraction ◽

Zirconium Acetate ◽

Liquid Precursors ◽

Crystal Film ◽

Crystal Films

ABSTRACTEpitaxial, single-crystal films of ZrO2 (Y2O3) were formed on (100) oriented single crystal substrates of ZrO2 (9.5 mol% Y2O3) using water-based solutions of zirconium acetate and yttrium nitrate as a precursor. Film compostions of ZrO2 (0 - 40 mol% Y2O3) were examined; since the lattice parameter of ZrO2 (Y2O3) increases with yttria content, the lattice mismatch was systematically varied to a maximum of 1.5%. Precursor films were deposited by spin coating, pyrolyzed, and held for 1 hour at 900°C, 1000°C, and 1100°C. X-ray diffraction showed that a strongly oriented film had developed after pyrolysis of the precursor. In addition, all samples, except those treated at 1100°C containing 6 – 15 mol% Y2O3, gave (111) peaks, indicating film polycrystallinity. Electron back-scattering patterns showed that epitaxial single crystals were formed at 1100°C for films containing 3 – 20 mol% Y2O3. Scanning electron microscopy showed that the epitaxial films had a porous structure. These results indicate that the epitaxy is a two-stage process: oriented nucleation upon pyrolysis, followed, for low mismatches, by subsequent consolidation into a single-crystal film above 1000°C.

Download Full-text