Formation of Chiral Plasmonic Silver Nanocrescents Using Colloidal Lithography and Ion-Plasma Sputtering

firstₚage Download PDF settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing:    Column Width:    Background: Open AccessAbstract Formation of Chiral Plasmonic Silver Nanocrescents Using Colloidal Lithography and Ion-Plasma Sputtering † by Ekaterina M. LobanovaEkaterina M. Lobanova SciProfiles Scilit Preprints. org Google Scholar * and Vladimir E. BochenkovVladimir E. Bochenkov SciProfiles Scilit Preprints. org Google Scholar Chemistry Department, Moscow State University, Moscow 119991, Russia * Author to whom correspondence should be addressed. † Presented at the 4th International Electronic Conference on Biosensors, 20–22 May 2024; Available online: https: //sciforum. net/event/IECB2024. Proceedings 2024, 104 (1), 13; https: //doi. org/10. 3390/proceedings2024104013 Published: 28 May 2024 (This article belongs to the Proceedings of The 4th International Electronic Conference on Biosensors) Download keyboardₐrrowdown Download PDF Download PDF with Cover Download XML Download Epub Versions Notes Keywords: plasmonics; biosensors; chiral plasmonics; metasurfaces; metal nanoparticles Nanomaterials based on plasmonic metal nanoparticles have a great potential for medicine, pharmaceuticals and sensors. Their unique optical properties are due to the enhancement of local near fields under the influence of external electromagnetic waves upon the excitation of a localized surface plasmon resonance. Optical properties of such nanomaterials depend on the characteristics of the nanoparticles: shape, size, material. Therefore, the development of experimental methods for the formation of new nanoparticles with a given shape is an urgent task. The plasmon resonance effect can be especially useful for studying the optical properties of chiral molecules, since they give very weak chiroptical signals due to the difference between molecular sizes and the wavelength of incident light. One of the main methods for studying chiral molecules is circular dichroism spectroscopy (CD). It can be expected that in the field of chiral plasmonic nanoparticles, the CD signal of chiral molecules will also be enhanced. We have achieved the formation of chiral plasmonic silver nanocrescents using a combination of colloidal lithography and ion-plasma sputtering methods. The new technique makes it possible to obtain substrate-supported arrays of chiral nanocrescents with various orientations and widths by controlling the angles of deposition and sputtering. It was shown that the resulting nanoparticles are characterized by enhanced absorption at wavelengths of 470 nm, 655 nm, 1050 nm, and 1400 nm. To sum up, the new fabrication technique provides a rapid and inexpensive way of forming chiral nanocrescents. Along with the techniques commonly used to measure the optical properties of metal nanoparticles (extinction and fluorescence spectroscopy), we anticipate that CD will play an important role due to the number of effective ways it can be used to detect interactions between biomolecules and chiral plasmonic systems. Further research is also needed to determine the relationship of crescent asymmetry with the CD signal and how to integrate such surfaces into functional commercial devices. Author ContributionsConceptualization, E. M. L. and V. E. B. ; methodology, E. M. L. and V. E. B. ; investigation, E. M. L. ; writing—original draft preparation, E. M. L. ; writing—review and editing, V. E. B. ; supervision, V. E. B. ; project administration, V. E. B. ; funding acquisition, V. E. B. All authors have read and agreed to the published version of the manuscript. FundingThe work is supported by the Russian Science Foundation grant no. 22-13-00126. Institutional Review Board StatementNot applicable. Informed Consent StatementNot applicable. Data Availability StatementThe data is available upon request. Conflicts of InterestThe authors declare no conflict of interest. Disclaimer/Publisher's Note: The statements, opinions and data contained in all publications are solely those of the individual author (s) and contributor (s) and not of MDPI and/or the editor (s). MDPI and/or the editor (s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https: //creativecommons. org/licenses/by/4. 0/). Share and Cite MDPI and ACS Style Lobanova, E. M. ; Bochenkov, V. E. Formation of Chiral Plasmonic Silver Nanocrescents Using Colloidal Lithography and Ion-Plasma Sputtering. Proceedings 2024, 104, 13. https: //doi. org/10. 3390/proceedings2024104013 AMA Style Lobanova EM, Bochenkov VE. Formation of Chiral Plasmonic Silver Nanocrescents Using Colloidal Lithography and Ion-Plasma Sputtering. Proceedings. 2024; 104 (1): 13. https: //doi. org/10. 3390/proceedings2024104013 Chicago/Turabian Style Lobanova, Ekaterina M. , and Vladimir E. Bochenkov. 2024. "Formation of Chiral Plasmonic Silver Nanocrescents Using Colloidal Lithography and Ion-Plasma Sputtering" Proceedings 104, no. 1: 13. https: //doi. org/10. 3390/proceedings2024104013 Article Metrics No No Article Access Statistics Multiple requests from the same IP address are counted as one view.