Nano Lett. 2016 Sep 14;16(9):5842-5. doi: 10.1021/acs.nanolett.6b02641. Epub 2016 Aug 18.

Spider Silk: Mother Nature's Bio-Superlens.

Nano letters

James N Monks, Bing Yan, Nicholas Hawkins, Fritz Vollrath, Zengbo Wang

PMID: 27531579 DOI: 10.1021/acs.nanolett.6b02641

Abstract

It was recently discovered that transparent microspheres and cylinders can function as a super-resolution lens (i.e., superlens) to focus light beyond the diffraction limit. A number of high-resolution applications based on these lenses have been successfully demonstrated and span nanoscopy, imaging, and spectroscopy. Fabrication of these superlenses, however, is often complex and requires sophisticated engineering processes. Clearly an easier model candidate, such as a naturally occurring superlens, is highly desirable. Here, we report for the first time a biological superlens provided by nature: the minor ampullate spider silk spun from the Nephila spider. This natural biosuperlens can distinctly resolve 100 nm features under a conventional white-light microscope with peak wavelength at 600 nm, attaining a resolution of λ/6 that is well beyond the classical limit. Thus, our work opens a new door to develop biology-based optical systems that may provide a new solution to integrating optics in biological systems.

Keywords: Biological superlens; nanoscopy; photonic nanojet; spider silk; super-resolution

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't
• Research Support, U.S. Gov't, Non-P.H.S.