Skip to main content
U.S. flag

An official website of the United States government

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.

Interrogating the Carbon and Oxygen K-edge NEXAFS of a CO2-dosed Hyperbranched Aminosilica



Laura Espinal, Martin L. Green, Dean M. DeLongchamp, Watcharop Chaikittisilp, Jarod C. Horn, Miles Sakwa-Novak, Cherno Jaye, Daniel A. Fischer, Nicholas Brunelli, Christopher Jones


Near edge x-ray absorption fine structure (NEXAFS) spectroscopy was used to study the adsorption of CO2 in a hyperbranched aminosilica (HAS) compound, a porous solid state material with great potential for carbon capture applications. After dosing a pristine (annealed) HAS sample with CO2, the NEXAFS spectrum presented a new π* resonance at 289.9 eV, which could be attributed to the formation of a C=O (carbonyl) bond. Our results suggest a carbamate bonding mechanism for the chemical adsorption of CO2 by the HAS.
Journal of Physical Chemistry Letters


hyperbranched aminosilica, NEXAFS, carbon capture materials, CO2 capture materials, carbon mitigation


Espinal, L. , Green, M. , DeLongchamp, D. , , W. , Horn, J. , Sakwa-Novak, M. , Jaye, C. , Fischer, D. , Brunelli, N. and Jones, C. (2014), Interrogating the Carbon and Oxygen K-edge NEXAFS of a CO2-dosed Hyperbranched Aminosilica, Journal of Physical Chemistry Letters, [online], (Accessed July 20, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created December 19, 2014, Updated November 10, 2018