Selective solvent-free chromium detection using cadmium-free quantum dots

Heather A. Meylemans; Alfred J. Baca; Lee R. Cambrea; Gregory S. Ostrom

doi:10.1117/1.JNP.11.036022

23 September 2017 Selective solvent-free chromium detection using cadmium-free quantum dots

Heather A. Meylemans, Alfred J. Baca, Lee R. Cambrea, Gregory S. Ostrom

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 3, 036022 (September 2017). https://doi.org/10.1117/1.JNP.11.036022

Abstract

Currently, the method of choice to test for the presence of chromium in water is to submit samples to a lab for testing. We present a simple field-ready test that is selective for the presence of chromium at concentrations of 100 ppb or greater. The Environmental Protection Agency maximum contaminant level (MCL) for total chromium is 100 ppb. This test uses a simple on/off fluorescent screening employing the use of silver indium sulfide (AgInS2) quantum dots (QDs). These QDs were impregnated into cotton pads to simplify field testing without the need for solvents or other liquid chemicals to be present. The change in fluorescence is instant and can be readily observed by eye with the use of a UV flashlight.

Citation Download Citation

Heather A. Meylemans, Alfred J. Baca, Lee R. Cambrea, and Gregory S. Ostrom "Selective solvent-free chromium detection using cadmium-free quantum dots," Journal of Nanophotonics 11(3), 036022 (23 September 2017). https://doi.org/10.1117/1.JNP.11.036022

Received: 8 June 2017; Accepted: 18 August 2017; Published: 23 September 2017

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available