https://scholar.dgist.ac.kr/handle/20.500.11750/60679 2026-11-05T04:48:24Z 2026-11-05T04:48:24Z Ra, Sooyeon Jagdale, Sourabh R. Jang, Jin Hyeok Jang, Minwoo Hwang, Kyoungtae Lee, Taewoo Jeong, Eun Hui Yoon, Soon Ho Moon, Byung Joon Son, Jangyup Lee, Dong-Su Bae, Sukang Park, Jun Dong Kim, Tae-Wook An, Sangmin Park, Sang Kyu https://scholar.dgist.ac.kr/handle/20.500.11750/60951 2026-10-14T08:10:13Z 2026-08-31T15:00:00Z

Title: Meniscus-Guided Soft-Lithographic Assembly of Grid-Type Molecular Martensite Films for Single-Crystal-Like Actuation Author(s): Ra, Sooyeon; Jagdale, Sourabh R.; Jang, Jin Hyeok; Jang, Minwoo; Hwang, Kyoungtae; Lee, Taewoo; Jeong, Eun Hui; Yoon, Soon Ho; Moon, Byung Joon; Son, Jangyup; Lee, Dong-Su; Bae, Sukang; Park, Jun Dong; Kim, Tae-Wook; An, Sangmin; Park, Sang Kyu Abstract: Dynamic molecular martensites exhibit large, reversible deformations and high force densities. However, device integration has been limited by the brittleness and poor formability of single crystals. Here, we report a thin-film route that translates molecular cooperativity into processable actuator architectures while preserving directional deformation. Meniscus-guided printing is combined with microtransfer molding to fabricate two-dimensional grid actuators of 6,13-bis(triisopropylsilylethynyl)pentacene. A partial drag-out regime in microchannel molds delays crystallization and enables seed-mediated sequential growth across intersections between horizontal and vertical microchannels. This mechanism produces a preferred b-axis-correlated preferential texture across the grid, with the crystallographic b-axis nearly aligned with the printing direction while allowing a small in-plane offset in twin-related variants. This texture provides the structural basis for predictable deformation comparable to that in single crystals. The resulting films are ultrathin, transferable over centimeter-scale areas, and mechanically robust, reproducing large thermoelastic strain and withstanding repeated actuation cycles without loss of performance. Beyond simple elongation, multi-unit assemblies can be constructed to achieve compression, demonstrating how different spatial arrangements enable various modes of actuation. Thus, this study bridges molecular-scale cooperativity and thin-film manufacturability, and provides an extendable strategy for translating thermally stable, solution-processable dynamic crystalline materials into functional, transferable, and microstructured actuator platforms.

2026-08-31T15:00:00Z