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Open AccessJournal ArticleDOI

On-Site Detection of SARS-CoV-2 Antigen by Deep Learning-Based Surface-Enhanced Raman Spectroscopy and Its Biochemical Foundations.

TLDR
In this article, a deep learning-based surface-enhanced Raman spectroscopy technique was developed for the sensitive, rapid, and on-site detection of the SARS-CoV-2 antigen in the throat swabs or sputum from 30 confirmed COVID-19 patients.
Abstract
A rapid, on-site, and accurate SARS-CoV-2 detection method is crucial for the prevention and control of the COVID-19 epidemic. However, such an ideal screening technology has not yet been developed for the diagnosis of SARS-CoV-2. Here, we have developed a deep learning-based surface-enhanced Raman spectroscopy technique for the sensitive, rapid, and on-site detection of the SARS-CoV-2 antigen in the throat swabs or sputum from 30 confirmed COVID-19 patients. A Raman database based on the spike protein of SARS-CoV-2 was established from experiments and theoretical calculations. The corresponding biochemical foundation for this method is also discussed. The deep learning model could predict the SARS-CoV-2 antigen with an identification accuracy of 87.7%. These results suggested that this method has great potential for the diagnosis, monitoring, and control of SARS-CoV-2 worldwide.

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Journal ArticleDOI

Recent Trends in SERS-Based Plasmonic Sensors for Disease Diagnostics, Biomolecules Detection, and Machine Learning Techniques

TL;DR: A brief review on the recent developments in the surface-enhanced Raman spectroscopy/scattering (SERS) technique for biosensing applications, with a particular focus on machine learning techniques used for the same can be found in this paper .
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Current state-of-art nanotechnology applications for developing SARS-CoV-2-detecting biosensors: A review

TL;DR: This critical review offers insight into the biosensor community in furthering the present research, which may streamline attrition problems for rapid and large-scale SARS-CoV-2 screening.
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State-of-the-art nanotechnologies used in the development of SARS-CoV-2 biosensors: a review

TL;DR: This critical review offers the biosensor community insight into how to progress the present research, which may streamline the removal of the problems facing rapid and large-scale SARS-CoV-2 screening.
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Methods of optical spectroscopy in detection of virus in infected samples: A review

TL;DR: In this article , four optical spectroscopy methods are discussed: ultraviolet (UV), infrared (IR), Raman, and fluorescence spectroglobalization (FLG) for detecting SARS-CoV-2.
Journal ArticleDOI

Raman spectroscopy for viral diagnostics

TL;DR: In this paper , a review of various Raman techniques employed for the investigation of viruses is presented, including conventional Raman spectroscopy, surface-enhanced Raman scattering, Raman tweezer, tip enhanced Raman Spectroscopy and coherent anti-Stokes scattering.
References
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Journal ArticleDOI

Generalized Gradient Approximation Made Simple

TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.

TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
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From ultrasoft pseudopotentials to the projector augmented-wave method

TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
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Ab Initio Calculation of Vibrational Absorption and Circular Dichroism Spectra Using Density Functional Force Fields

TL;DR: In this article, the unpolarized absorption and circular dichroism spectra of the fundamental vibrational transitions of the chiral molecule, 4-methyl-2-oxetanone, are calculated ab initio using DFT, MP2, and SCF methodologies and a 5S4P2D/3S2P (TZ2P) basis set.
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Controlled nucleation for the regulation of the particle size in monodisperse gold suspensions

G. Frens
- 01 Jan 1973 - 
TL;DR: In this article, a series of monodisperse suspensions of the same chemical composition but of rather different particle sizes was used to study particle size dependent phenomena, such as Brownian motion, light scattering, sedimentation and electrophoresis of small particles.
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