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

. 2018 Oct 4;13:6019–6028. doi: 10.2147/IJN.S175523

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

© 2018 Mohsin and Salim. This work is published and licensed by Dove Medical Press Limited

The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

PMC Copyright notice

(A) Gold nanoparticle (AuNP) characterization: ultraviolet-visible spectroscopy (UV-Vis) spectrum of 80 nm diameter gold nanospheres (AuNS) compared with Mie theory and finite-difference time-domain (FDTD) simulations. The UV-Vis spectrum is the ensemble spectrum which is slightly red shifted compared to Mie theory and FDTD simulated single particle spectrum. (B) Typical confocal laser scattering point spread function (PSF) profile calculated from the cross-section of one of the areas of scattered intensity and collected with a photomultiplier tube, when the laser is scanned across the sample. The analytical PSF (blue continuous line) from single particles matches perfectly with experimental PSF (red dotted line), whereas the dimer has 1.2 times higher PSF (black dotted line). Red color spectrum indicates analytical PSF using Vectorial Debye theory for objective 1.4 numerical aperture, at 715 nm wavelength for circular polarization. Vectorial Debye theory can be used to calculate the diffraction pattern of an objective lens of high numerical aperture.