Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 Oct 20;6(10):e17075. doi: 10.1038/lsa.2017.75

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

PMC Copyright notice

The gold-nanosponge sample. (a, b) Scanning electron microscopy (SEM) images of two representative gold nanosponges, henceforth called nanosponges A and B, respectively. (c) Cross-sectional model geometry for finite-difference time-domain (FDTD) calculations. The spherical inclusions are overlapping and form a percolating network with a filling fraction of 0.36, comparable to the experimental results. (d) SEM image of the sample surface with several nanosponges. (e) Photoelectron emission microscopy image of the same area of the sample with a single sponge visible. All nanosponges show strong electron emission. (f) Cross-sectional SEM image of a nanosponge underneath a protecting platinum layer that has been cut open by a focused ion beam, revealing the internal percolated structure.