title: Selective detection of crystalline cellulose in plant cell walls with sum-frequency-generation (SFG) vibration spectroscopy.
abstract: The selective detection of crystalline cellulose in biomass was demonstrated with sum-frequency-generation (SFG) vibration spectroscopy. SFG is a second-order nonlinear optical response from a system where the optical centrosymmetry is broken. In secondary plant cell walls that contain mostly cellulose, hemicellulose, and lignin with varying concentrations, only certain vibration modes in the crystalline cellulose structure can meet the noninversion symmetry requirements. Thus, SFG can be used to detect and analyze crystalline cellulose selectively in lignocellulosic biomass without extraction of noncellulosic species from biomass or deconvolution of amorphous spectra. The selective detection of crystalline cellulose in lignocellulosic biomass is not readily achievable with other techniques such as XRD, solid-state NMR, IR, and Raman analyses. Therefore, the SFG analysis presents a unique opportunity to reveal the cellulose crystalline structure in lignocellulosic biomass.
authors: Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors: Anna L
authors: AL
authors: Barnette
authors: Laura C
authors: LC
authors: Bradley
authors: Brandon D
authors: BD
authors: Veres
authors: Edward P
authors: EP
authors: Schreiner
authors: Yong Bum
authors: YB
authors: Park
authors: Junyeong
authors: J
authors: Park
authors: Sunkyu
authors: S
authors: Park
authors: Seong H
authors: SH
authors: Kim