Linearly Polarized Infrared Spectroscopy for the Analysis of Biological Materials

C Gassner, J Vongsvivut, SH Ng, M Ryu… - Applied …, 2023 - opg.optica.org
The analysis of biological samples with polarized infrared spectroscopy (p-IR) has long
been a widely practiced method for the determination of sample orientation and structural …

Synchrotron macro ATR-FTIR microspectroscopy for high-resolution chemical map** of single cells

J Vongsvivut, D Pérez-Guaita, BR Wood, P Heraud… - Analyst, 2019 - pubs.rsc.org
Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy has been
used widely for probing the molecular properties of materials. Coupling a synchrotron …

Attenuated total reflection at THz wavelengths: prospective use of total internal reflection and polariscopy

M Ryu, SH Ng, V Anand, S Lundgaard, J Hu, T Katkus… - Applied Sciences, 2021 - mdpi.com
Capabilities of the attenuated total reflection (ATR) at THz wavelengths for increased sub-
surface depth characterisation of (bio-) materials are presented. The penetration depth of a …

Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression

S Ranjan, M Ryu, R Morioka, S Kamegaki… - Journal of the …, 2023 - ACS Publications
A two-directional ferroelastic deformation in organic crystals is unprecedented owing to its
anisotropic crystal packing, in contrast to isotropic symmetrical packing in inorganic …

Investigation of oil distribution in spray-dried chia seed oil microcapsules using synchrotron-FTIR microspectroscopy

YP Timilsena, J Vongsvivut, MJ Tobin, R Adhikari… - Food Chemistry, 2019 - Elsevier
In this study, chia seed oil (CSO) microcapsules were produced using three types of shell
materials, including chia seed protein (CPI), chia seed gum (CSG) and CPI-CSG complex …

Revealing the spatial distribution of chemical species within latent fingermarks using vibrational spectroscopy

BN Dorakumbura, RE Boseley, T Becker, DE Martin… - Analyst, 2018 - pubs.rsc.org
Latent fingermarks are an important form of crime-scene trace evidence and their usefulness
may be increased by a greater understanding of the effect of chemical distribution within …

Map** of supramolecular chirality in insect wings by microscopic vibrational circular dichroism spectroscopy: heterogeneity in protein distribution

H Sato, A Yamagishi, M Shimizu… - The Journal of …, 2021 - ACS Publications
The supramolecular chirality of the hindwing of Anomala albopilosa (male) was investigated
using a microscopic vibrational circular dichroism (VCD) system, denoted as MultiD-VCD …

Dielectric cross-shaped-resonator-based metasurface for vortex beam generation at mid-IR and THz wavelengths

R Dharmavarapu, K Izumi, I Katayama, SH Ng… - …, 2019 - degruyter.com
Metasurfaces are engineered thin surfaces comprising two-dimensional (2D) arrays of sub-
wavelength-spaced and sub-wavelength-sized resonators. Metasurfaces can locally …

Hyperspectral map** of anisotropy

M Ryu, R Honda, A Balčytis, J Vongsvivut… - Nanoscale …, 2019 - pubs.rsc.org
Anisotropy of absorbance (dichroism) and birefringence limits spatial resolution, sensitivity
during quantitative detection of trace analytes, as well as spectral imaging in the near-IR and …

Super-resolved 3D map** of molecular orientation using vibrational techniques

P Koziol, K Kosowska, D Liberda… - Journal of the …, 2022 - ACS Publications
When a sample has an anisotropic structure, it is possible to obtain additional information
controlling the polarization of incident light. With their straightforward instrumentation …