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.
Art & Artifacts
Chemistry In Pictures
Chemistry in Pictures: Bronze aged
by Manny Morone
January 10, 2019
Auguste Rodin’s The Man with the Key has turned pale green over the past century. But despite the uniform color, several different copper-containing minerals have engulfed the bronze sculpture as it corroded in the acid rains and pollution of Oslo where it is displayed. Researchers at the Norwegian University of Science and Technology are now working to pick out whether certain areas have formed antlerite or brochantite, which are both green minerals that form as copper oxidizes but are treated differently when conservationists try to preserve bronze sculptures. The researchers used hyperspectral infrared imaging to compare the spectra from patches of the sculpture to the spectra of just antlerite and just brochantite. The researchers then created maps (bottom row, from left: visible appearance of sculpture, brochantite map, antlerite map) that show areas where each mineral is most present (dark areas indicated with arrows).
To read more about this material, check out the story by Bethany Halford.
Credit: City of Oslo Art Collection and J. Spectral Imaging
Do science. Take pictures. Win money. Enter our photo contest here.
Related C&EN Content:
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 X