Full-Scale Label-Free Surface-Enhanced Raman Scattering Analysis of Mouse Brain Using a Black Phosphorus-Based Two-Dimensional Nanoprobe

The brain takes the vital role in human physiological and psychological activities. The precise understanding of the structure of the brain can supply the material basis for the psychological behavior and cognitive ability of human beings. In this study, a fast molecular fingerprint analysis of mous...

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Bibliographic Details
Published in:Applied sciences 2019-01, Vol.9 (3), p.398
Main Authors: Guo, Tiejun, Ding, Fangsheng, Li, Dongling, Zhang, Wen, Cao, Liren, Liu, Zhiming
Format: Article
Language:English
Subjects:
black phosphorus
Brain
Brain research
Chemical composition
Chemical fingerprinting
Citric acid
Cognitive ability
fingerprint analysis
Free surfaces
Gold
Hemispheres
Hemispheric laterality
Human behavior
Human mechanics
label-free imaging
Laboratories
Memory
mouse brain
Nanocomposites
Nanomaterials
Nanoparticles
Neuroimaging
Neurosciences
Phosphorus
Physiology
Proteins
Quantum dots
Raman spectra
Raman spectroscopy
Spectral analysis
Spectroscopy
surface-enhanced Raman scattering
Tissue analysis
Tissues
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Summary:The brain takes the vital role in human physiological and psychological activities. The precise understanding of the structure of the brain can supply the material basis for the psychological behavior and cognitive ability of human beings. In this study, a fast molecular fingerprint analysis of mouse brain tissue was performed using surface-enhanced Raman scattering (SERS) spectroscopy. A nanohybrid consisting of flake-like black phosphorus (BP) and Au nanoparticles (BP-AuNSs) served as the novel SERS substrate for the spectral analysis of brain tissue. BP-AuNSs exhibited outstanding SERS activity compared to the traditional citrate-stabilized Au nanoparticles, which could be largely ascribed to the plentiful hot spots formed in the BP nanosheet. Rapid, full-scale and label-free SERS imaging of mouse brain tissue was then realized with a scanning speed of 56 ms per pixel. Fine textures and clear contour were observed in the SERS images of brain tissue, which could be well in accordance with the classical histological analysis; however, it could avoid the disadvantages in the processing procedure of tissue section. Additionally, the SERS spectra illustrated plentiful biochemical fingerprint of brain tissue, which indicated the molecular composition of various encephalic regions. The SERS difference spectrum of the left versus right hemisphere revealed the biochemical difference between the two hemispheres, which helped to uncover the psychological and cognitive models of the left and right hemispheres.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9030398