journal article·2025-11-11

Visualization of the Assembly Behaviors of Gel Layer-Coated Melanin Particles at the Air/Water Interface via Structural Color

Yui Maejima, Ai Takabatake, Shin-ichi Takeda, Hiroshi Fudouzi, Keiki Kishikawa, Daisuke Unabara, Tasuku Hamaguchi, Koji Yonekura, Takuma Kureha, Hideyuki Mitomo, Kanae Ito, Keiichi Osaka, Kiyoshi Kanie, Michinari Kohri

Langmuir· Volume 41· Issue 44
Publisher page

Abstract

Surface-modified particles and microgels are known to adsorb at the air/water interface. This particle assembly behavior has been evaluated primarily under conditions in which all particles are adsorbed using a dilute dispersion. Herein, we visualized the adsorption/stabilization process of particle assemblies at the air/water interface in a concentrated dispersion based on structural coloration. Melanin particles were coated with a gel layer, and then aqueous dispersions were prepared and dried. Pristine melanin particle dispersions produced pronounced "coffee-ring" patterns with almost no particle deposition in the center. In contrast, the use of polymer gel-coated particles suppressed the coffee-ring effect and caused particle deposition in both the center of the pattern and around the periphery, indicating that the gel layer affected the assembly behavior. During the drying process, structural color analysis revealed stabilization at the air/water interface and differences in the size and motion of the domain. Furthermore, this gel-coated particle was shown to be effective for structural color coating with uniform visibility.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Nanomaterials and Printing Technologies · Pickering emulsions and particle stabilization · Surface Modification and Superhydrophobicity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Applied Chemistry and Biotechnology, Graduate School of Science and Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

MS Scientific Co. Ltd., 4-11-3, Kuramae, Taito-ku, Tokyo 111-0051, Japan

Takeda Colloid Techno-Consulting Co., Ltd., 16-23, Toyotsu-cho, Suita, Osaka 564-0051, Japan

National Institute for Materials Science, 1-2-1, Sengen, Tsukuba-Shi, Ibaraki 305-0047, Japan

Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Biostructural Mechanism Laboratory, RIKEN SPring-8 Center, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan

Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, 3 Bunkyo-cho, Hirosaki 036-8561, Japan

Research Institute for Electronic Science, Hokkaido University, Kita 21, Nishi 10, Kita-Ku, Sapporo, Hokkaido 001-0021, Japan

General Support Division, Japan Synchrotron Radiation Research Institute, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan

International Center for Synchrotron Radiation Innovation Smart, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan

Funding

Ministry of Education, Culture, Sports, Science and Technology · Japan Agency for Medical Research and Development · Japan Society for the Promotion of Science · National Institute for Materials Science · Support for Pioneering Research Initiated by the Next Generation

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