Solvent-induced reversible color changes in block copolymer films and new locking method of structural colors

2005 ◽  
Vol 16 (8) ◽  
pp. 628-632 ◽  
Author(s):  
Koji Ishizu ◽  
Michio Yasuda ◽  
Yumi Sato ◽  
Toru Tamura
Keyword(s):  
Block Copolymer ◽  
Color Changes ◽  
Copolymer Films ◽  
Structural Colors

scholarly journals Ultra-Fast Vertical Ordering of Lamellar Block Copolymer Films on Unmodified Substrates

2021 ◽  
Vol 54 (3) ◽  
pp. 1564-1573
Author(s):  
Maninderjeet Singh ◽  
Wenjie Wu ◽  
Monali N. Basutkar ◽  
Joseph Strzalka ◽  
Abdullah M. Al-Enizi ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Copolymer Films

Morphology Control in Block Copolymer Films Using Mixed Solvent Vapors

ACS Nano ◽  
2012 ◽  
Vol 6 (9) ◽  
pp. 8052-8059 ◽  
Author(s):  
Kevin W. Gotrik ◽  
Adam F. Hannon ◽  
Jeong Gon Son ◽  
Brent Keller ◽  
Alfredo Alexander-Katz ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Mixed Solvent ◽  
Morphology Control ◽  
Copolymer Films ◽  
Solvent Vapors

Symmetry-breaking in double gyroid block copolymer films by non-affine distortion

2021 ◽  
Vol 23 ◽  
pp. 101006
Author(s):  
Seungyun Jo ◽  
Haedong Park ◽  
Taesuk Jun ◽  
Kwangjin Kim ◽  
Hyunsoo Jung ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Symmetry Breaking ◽  
Copolymer Films ◽  
Double Gyroid

Rapid shear alignment of sub-10 nm cylinder-forming block copolymer films based on thermal expansion mismatch

Nano Futures ◽  
2018 ◽  
Vol 1 (3) ◽  
pp. 035006
Author(s):  
Samuel M Nicaise ◽  
Karim R Gadelrab ◽  
Amir Tavakkoli K G ◽  
Caroline A Ross ◽  
Alfredo Alexander-Katz ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Block Copolymer ◽  
Thermal Expansion Mismatch ◽  
Shear Alignment ◽  
Copolymer Films

Surface Tension of Micellar Block Copolymer Films

2010 ◽  
Vol 57 (6) ◽  
pp. 1412-1415 ◽  
Author(s):  
Hyunjung Kim ◽  
Heeju Lee ◽  
Xiaolong Li ◽  
Zhang Jiang ◽  
Jung-Ran Lim ◽  
...  
Keyword(s):  
Surface Tension ◽  
Block Copolymer ◽  
Copolymer Films

scholarly journals High‐Fidelity, Sub‐5 nm Patterns from High‐χ Block Copolymer Films with Vapor‐Deposited Ultrathin, Cross‐Linked Surface‐Modification Layers

2020 ◽  
Vol 41 (4) ◽  
pp. 2070008
Author(s):  
Hyun Suk Wang ◽  
Seula Oh ◽  
Junhwan Choi ◽  
Wontae Jang ◽  
Ki Hyun Kim ◽  
...  
Keyword(s):  
Surface Modification ◽  
Block Copolymer ◽  
High Fidelity ◽  
Copolymer Films

Feather morphological predictors of angle-dependent color changes in parrot plumage

2020 ◽  
Vol 13 (4) ◽  
pp. 108-117
Author(s):  
Steven Reed ◽  
Richard K Simpson ◽  
Kevin J McGraw
Keyword(s):  
Phylogenetic Signal ◽  
Interspecific Variation ◽  
Plumage Color ◽  
Color Changes ◽  
Structural Colors ◽  
Angle Dependence ◽  
Novel Approach ◽  
Euclidean Distances ◽  
Parrot Species ◽  
First Time

Among the most ornate animal traits in nature are the angle-dependent (e.g. iridescent) structural colors of many fishes, damselflies, birds, beetles, and butterflies. Though we now have a solid understanding of the mechanisms that create angle-dependent coloration in several groups, we know little about whether pigmentary colors reflect light in an angle-dependent fashion or if similar or different mechanisms govern angle-dependent reflectance from pigmentary versus structural colors. Here for the first time we describe non-iridescent angle-dependent coloration from the tail and wing feathers of several parrot species (Aves: Psittaciformes). We employed a novel approach—by calculating chromatic and achromatic contrasts (in just noticeable differences, JNDs) of straight and angled measurements of the same feather patch—to test for perceptually relevant angle-dependent changes in coloration on dorsal and ventral feather surfaces. We found, among the 15 parrot species studied, significant angle dependence for seven of our eight feather JND parameters. We then measured micro-scale features on each side of feathers, including size and color of barbs and barbules, to attempt to predict interspecific variation in degree of angle-dependent reflectance. We found that barb height, plumage-color type (e.g. melanin, structural), and differences between barb-barbule coloration (measured using Euclidean distances) were the strongest predictors of angle-dependent coloration. Interestingly, there was no significant phylogenetic signal in any of the angle-dependence models tested. These findings deepen our views on the importance of microscopic feather features in the production of directional animal coloration, especially in tissues that are colored predominantly by pigments and appear to be statically colored.

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