Elucidating the effect of boundary curvature on the wrinkling of thin suspended films by theory and experiment

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K03782
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Okinawa Institute of Science and Technology Graduate University
• Principal Investigator: Janssens Stoffel 沖縄科学技術大学院大学, 力学と材料科学ユニット, グループリーダー (00817629)
• Co-Investigator(Kenkyū-buntansha): フリード エリオット 沖縄科学技術大学院大学, 力学と材料科学ユニット, 教授 (70735761)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: wrinkling / nanocrystalline diamond / femtosecond laser / nanochannel / nanofluidics / delamination

Outline of Final Research Achievements

This project was undertaken for the purpose of wrinkle research. During the course of this research, we accidentally discovered a technique for fabricating optically accessible nanochannels of arbitrary length using a femtosecond laser. These nanochannels are formed between a thin film of nanocrystalline diamond and a glass substrate, their cross-section resembles a slit with a width-to-height ratio of approximately 100, and their height can be precisely tuned at less than 100 nm. We were able to elucidate the laser processing mechanism that creates the channels, and we were able to demonstrate film patterning using the same technique. To validate the applicability of this research, we have developed nanofluidic devices that do not require the use of complex, costly, and time-consuming fabrication techniques.

Free Research Field

Nanocrystalline diamond

Academic Significance and Societal Importance of the Research Achievements

The project is of fundamental scientific significance for various applications, such as designing nanofluidic devices for biomolecule detection.