Advertisement
Grab your lab coat. Let's get started
Welcome!
Welcome!
Create an account below to get 6 C&EN articles per month, receive newsletters and more - all free.
It seems this is your first time logging in online. Please enter the following information to continue.
As an ACS member you automatically get access to this site. All we need is few more details to create your reading experience.
Not you? Sign in with a different account.
Not you? Sign in with a different account.
ERROR 1
ERROR 1
ERROR 2
ERROR 2
ERROR 2
ERROR 2
ERROR 2
Password and Confirm password must match.
If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)
ERROR 2
ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.
Credit: Bidyut Das
Credit: Shutterstock
In 2016, hoping to decrease the amount of counterfeit money in their economy, the government of India began issuing new bank notes, like these ₹200 notes. They created the notes with some built-in anti-counterfeiting features. Bidyut Das, a PhD student at Cotton University in the lab of Abdul Wahab, usually uses the lab’s ultraviolet-light chamber to look at fluorescent dyes he’s studying for high-efficiency solar cells, but this time he chose to check out one of the notes’ security features: a variety of fluorescent dyes used to print images on the bill and its security ribbon. When he placed the bill under ultraviolet light (top), he could see designs and words not visible under normal light (bottom).
Submitted by Bidyut Das (fluorescing note); Credit: Shutterstock (visible-light note)
Do science. Take pictures. Win money. Enter our photo contest here.
Related C&EN Content:
Chemical & Engineering News
ISSN 0009-2347
Copyright © 2024 American Chemical Society
You might also like...
The power is now in your (nitrile gloved) hands
Sign up for a free account to get more articles. Or choose the ACS option that’s right for you.
Already have an ACS ID? Log in
Join the conversation
Contact the reporter
Submit a Letter to the Editor for publication
Engage with us on Twitter