# Hinokitiol-fueled disks form exclusionary zones in the presence of iron https://mdr.nims.go.jp/datasets/6613faad-b8b5-41cb-83de-e96491205bad ## File - [RSC Adv,2026,16,12725.pdf](https://mdr.nims.go.jp/filesets/5fcd669c-f311-4644-bcd1-27d1386898b0/download) ([Detail](https://mdr.nims.go.jp/filesets/5fcd669c-f311-4644-bcd1-27d1386898b0.md)) - [d6ra01403h1.pdf](https://mdr.nims.go.jp/filesets/411a5663-51d6-427e-b06f-c56870482824/download) ([Detail](https://mdr.nims.go.jp/filesets/411a5663-51d6-427e-b06f-c56870482824.md)) - [movie1_pHT on 100mM Fe_x2.mp4](https://mdr.nims.go.jp/filesets/fd68c91f-0902-4748-b8e7-a1905890180f/download) ([Detail](https://mdr.nims.go.jp/filesets/fd68c91f-0902-4748-b8e7-a1905890180f.md)) - [movie2_x2 speed.mp4](https://mdr.nims.go.jp/filesets/1fcd8e9b-92a1-43c7-abd4-1841f2813319/download) ([Detail](https://mdr.nims.go.jp/filesets/1fcd8e9b-92a1-43c7-abd4-1841f2813319.md)) - [movie3_1st disk_0-60s_x2.mp4](https://mdr.nims.go.jp/filesets/b7657a94-1f1d-45e5-8f7b-b8103164cc60/download) ([Detail](https://mdr.nims.go.jp/filesets/b7657a94-1f1d-45e5-8f7b-b8103164cc60.md)) - [movie4_1st disk_140-200s_x2.mp4](https://mdr.nims.go.jp/filesets/46590233-3169-4c62-8a1c-eb765dc2a623/download) ([Detail](https://mdr.nims.go.jp/filesets/46590233-3169-4c62-8a1c-eb765dc2a623.md)) - [movie5_1st disk_330-390s_x2.mp4](https://mdr.nims.go.jp/filesets/2b0fc151-cb87-4e45-9cd7-a1b1bc5ac784/download) ([Detail](https://mdr.nims.go.jp/filesets/2b0fc151-cb87-4e45-9cd7-a1b1bc5ac784.md)) - [movie6_2nd disk_x2 speed.mp4](https://mdr.nims.go.jp/filesets/704ac8bb-254c-48b7-8b0a-ff0ee7624c0a/download) ([Detail](https://mdr.nims.go.jp/filesets/704ac8bb-254c-48b7-8b0a-ff0ee7624c0a.md)) ## Id 6613faad-b8b5-41cb-83de-e96491205bad ## Local identifier ## Visibility open_to_public ## State published ## Created at 2026-03-06T13:03:51.999613Z ## Updated at 2026-03-10T03:30:04.018506Z ## Published at 2026-03-10T00:03:20.168235Z ## Doi ## First published url https://doi.org/10.1039/D6RA01403H ## Date published 2026-03-06 ## Recorded date published 2026-3-3 ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: Hinokitiol-fueled disks form exclusionary zones in the presence of iron title_type: original lang: en ## Description - description: Stimuli-responsive, directional motions, such as chemotaxis, are vital for the development of sophisticated synthetic systems with autonomous motility. Here, we demonstrate that disks containing hinokitiol exhibit directional self-propelled motion on water in response to metal ions, particularly Fe(III) ion. The self-propelled motion arises from surface tension gradients at the air–water interface, generated by the asymmetric release of hinokitiol, which induce Marangoni flows that propel the disks. Upon contact with Fe(III), hinokitiol forms a highly surface-active complex that locally lowers the surface tension and establishes a persistent interfacial gradient. This localized accumulation of the iron complex acts as a chemo-repulsive signal, directing the disks away from iron-rich regions and leading to the formation of exclusionary zones that influence the trajectories of subsequent disks. These findings demonstrate how self-secreted chemical signals can generate interfacial memory and communication in macroscopic active systems, providing a molecular design principle for life-like collective behavior. description_type: abstract lang: eng ## Creator - name: Lara Rae Holstein role: author orcid: https://orcid.org/0009-0008-6412-5108 organization: National Institute for Materials Science department: Research Center for Macromolecules and Biomaterials/Macromolecules Field/Molecular Design and Function Group - name: Megan S. Santamore role: author organization: National Institute for Materials Science department: Research Center for Macromolecules and Biomaterials/Macromolecules Field/Molecular Design and Function Group - name: Asahi Tsukamoto role: author organization: National Institute for Materials Science department: Research Center for Macromolecules and Biomaterials/Macromolecules Field/Molecular Design and Function Group - name: Masayuki Takeuchi role: author orcid: https://orcid.org/0000-0002-0207-0665 organization: National Institute for Materials Science department: Research Center for Macromolecules and Biomaterials/Macromolecules Field/Molecular Design and Function Group - name: Nobuhiko J. Suematsu role: author organization: Meiji University - name: Atsuro Takai role: author orcid: https://orcid.org/0000-0003-3457-3352 organization: National Institute for Materials Science department: Research Center for Macromolecules and Biomaterials/Macromolecules Field/Molecular Design and Function Group ## Contact agent ## Publisher organization: Royal Society of Chemistry (RSC) ## Managing organization ## Keyword - subject: Hinokitiol schema: not_defined - subject: Chemotaxis schema: not_defined - subject: Self-propelled motion schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by-nc/3.0/ ## Other identifier(s) ## Data origin - data_origin_type: other ## Embargo ## Journal - title: RSC Advances issn: '20462069' volume: '16' issue: '14' start_page: 12725 end_page: 12729 ## Conference ## Related item ## Funding - identifier: JPMXP0724020292 funder_name: Ministry of Education, Culture, Sports, Science and Technology - identifier: JPMXP1224NM5109 funder_name: Ministry of Education, Culture, Sports, Science and Technology - identifier: JPMXP1225NM5064 funder_name: Ministry of Education, Culture, Sports, Science and Technology - identifier: JP21H01004 funder_name: Japan Society for the Promotion of Science - identifier: JP23K03347 funder_name: Japan Society for the Promotion of Science - identifier: JP23K04725 funder_name: Japan Society for the Promotion of Science - identifier: JP24H01734 funder_name: Japan Society for the Promotion of Science - identifier: JP24K01475 funder_name: Japan Society for the Promotion of Science - funder_name: Inamori Foundation ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: 5fcd669c-f311-4644-bcd1-27d1386898b0 filename: RSC Adv,2026,16,12725.pdf content_type: application/pdf size: 627019 md5: ae179c47fb7550903e5629b6c18e94f7 - id: 411a5663-51d6-427e-b06f-c56870482824 filename: d6ra01403h1.pdf content_type: application/pdf size: 1886979 md5: 2a3e1086d5ff83497520af29b58ce2b9 - id: fd68c91f-0902-4748-b8e7-a1905890180f filename: movie1_pHT on 100mM Fe_x2.mp4 content_type: video/mp4 size: 987517 md5: 952f75b3633a0502bb671b680e21d047 - id: 1fcd8e9b-92a1-43c7-abd4-1841f2813319 filename: movie2_x2 speed.mp4 content_type: video/mp4 size: 1190385 md5: 42be57db297034c547d79017123366e1 - id: b7657a94-1f1d-45e5-8f7b-b8103164cc60 filename: movie3_1st disk_0-60s_x2.mp4 content_type: video/mp4 size: 1250300 md5: 0c7c1e1a91700daade4f1fd24c7d7c4c - id: 46590233-3169-4c62-8a1c-eb765dc2a623 filename: movie4_1st disk_140-200s_x2.mp4 content_type: video/mp4 size: 1200223 md5: 816fd8b338cf566cba828e3b531d7ba1 - id: 2b0fc151-cb87-4e45-9cd7-a1b1bc5ac784 filename: movie5_1st disk_330-390s_x2.mp4 content_type: video/mp4 size: 1199287 md5: 3770ef8db8a1f8817c8411c4f454376f - id: 704ac8bb-254c-48b7-8b0a-ff0ee7624c0a filename: movie6_2nd disk_x2 speed.mp4 content_type: video/mp4 size: 1320697 md5: b78246ea4f1c8c9abfb5246a57093e79 ## Thumbnail fileset_id: 704ac8bb-254c-48b7-8b0a-ff0ee7624c0a filename: movie6_2nd disk_x2 speed.mp4