期刊
NANO LETTERS
卷 16, 期 9, 页码 5842-5845出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b02641
关键词
Biological superlens; spider silk; super-resolution; nanoscopy; photonic nanojet
类别
资金
- Ser Cymru National Research Networking Advanced Engineering and Materials, UK [NRN113, NRNF66]
- Welsh Crucible Grant
- US Air Force Office of Scientific Research AFOSR [FA9550-15-1-0264]
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 run, attaining a resolution of lambda/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.
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