{"title":"Microrotors with Tunable Trajectory Curvatures Driven by Chemical and Photochemical Dual Engines","authors":"Ruitong Zhu, Donghao Cui, Dezhou Cao, Zuyao Yan, Shifang Duan and Wei Wang*, ","doi":"10.1021/acsmaterialslett.4c02111","DOIUrl":null,"url":null,"abstract":"<p >A major challenge in developing smart micromachines that can mimic natural microorganisms is their ability to adapt to changing environments. This study presents a matchstick-shaped microrotor consisting of a TiO<sub>2</sub> head and a SiO<sub>2</sub> tail, with one side coated by PtO. The TiO<sub>2</sub> head provides photochemical propulsion under UV light, while the PtO coating provides chemical propulsion in H<sub>2</sub>O<sub>2</sub>. The microrotor rotates because of its asymmetric structure and uneven propulsion forces. Notably, under stronger UV light, the rotor orbits in tighter circles as the photochemical engine counteracts the chemical engine, with the two engines located on opposite sides of the center of mass. Additionally, microrotors with shorter SiO<sub>2</sub> tails moved in smaller circles and were more sensitive to changes in light intensity.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 2","pages":"668–674 668–674"},"PeriodicalIF":8.7000,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.4c02111","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A major challenge in developing smart micromachines that can mimic natural microorganisms is their ability to adapt to changing environments. This study presents a matchstick-shaped microrotor consisting of a TiO2 head and a SiO2 tail, with one side coated by PtO. The TiO2 head provides photochemical propulsion under UV light, while the PtO coating provides chemical propulsion in H2O2. The microrotor rotates because of its asymmetric structure and uneven propulsion forces. Notably, under stronger UV light, the rotor orbits in tighter circles as the photochemical engine counteracts the chemical engine, with the two engines located on opposite sides of the center of mass. Additionally, microrotors with shorter SiO2 tails moved in smaller circles and were more sensitive to changes in light intensity.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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