Abstract:
:Peak force infrared (PFIR) microscopy is a recently developed approach to acquire multiple chemical and physical material properties simultaneously and with nanometer resolution: topographical features, infrared (IR)-sensitive maps, adhesion, stiffness, and locally resolved IR spectra. This multifunctional mapping is enabled by the ability of an atomic force microscope tip in the peak force tapping mode to detect photothermal expansion of the sample. We report the use of the PFIR to characterize the chemical modification of bio-based native and intact wooden matrices, which has evolved into an increasingly active research field. The distribution of functional groups of wood cellulose aggregates, either in native or carboxylated states, was detected with a remarkable spatial resolution of 16 nm. Furthermore, mechanical and chemical maps of the distinct cell wall layers were obtained on polymerized wooden matrices to localize the exact position of the modified regions. These findings shall support the development and understanding of functionalized wood materials.
journal_name
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Gusenbauer C,Jakob DS,Xu XG,Vezenov DV,Cabane É,Konnerth Jdoi
10.1021/acs.biomac.0c01028subject
Has Abstractpub_date
2020-10-12 00:00:00pages
4244-4252issue
10eissn
1525-7797issn
1526-4602journal_volume
21pub_type
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