Rapid and accurate chemical composition identification is critically important in chemistry.While it can be achieved with optical absorption spectrometry by comparing the experimental spectra with the reference data w...Rapid and accurate chemical composition identification is critically important in chemistry.While it can be achieved with optical absorption spectrometry by comparing the experimental spectra with the reference data when the chemical compositions are simple,such application is limited in more complicated scenarios especially in nano-scale research.This is due to the difficulties in identifying optical absorption peaks(i.e.,from“featureless”spectra)arose from the complexity.In this work,using the ultraviolet-visible(UV-Vis)absorption spectra of metal nanoclusters(NCs)as a demonstration,we develop a machine-learningbased method to unravel the compositions of metal NCs behind the“featureless”spectra.By implementing a one-dimensional convolutional neural network,good matches between prediction results and experimental results and low mean absolute error values are achieved on these optical absorption spectra that human cannot interpret.This work opens a door for the identification of nanomaterials at molecular precision from their optical properties,paving the way to rapid and high-throughput characterizations.展开更多
Lithium niobate is a well-known dielectric material and its defect microstructures have shown a huge impact on its acousto-optical,piezoelectric,and electro-optical properties.However,an understanding of the involved ...Lithium niobate is a well-known dielectric material and its defect microstructures have shown a huge impact on its acousto-optical,piezoelectric,and electro-optical properties.However,an understanding of the involved defect structures and identification of the chemical composition of lithium niobate are still not achieved due to the lack of sufficient methodologies.In this work,near-stoichiometric and non-stoichiometric lithium niobate powders were comprehensively studied by X-ray diffraction(XRD)and high-temperature Raman and UV-vis spectroscopy.展开更多
基金the Singapore RIE2020 Advanced Manufacturing and Engineering Programmatic grant“Accelerated Materials Development for Manufacturing”by the Agency for Science,Technology and Research under No.A1898b0043.
文摘Rapid and accurate chemical composition identification is critically important in chemistry.While it can be achieved with optical absorption spectrometry by comparing the experimental spectra with the reference data when the chemical compositions are simple,such application is limited in more complicated scenarios especially in nano-scale research.This is due to the difficulties in identifying optical absorption peaks(i.e.,from“featureless”spectra)arose from the complexity.In this work,using the ultraviolet-visible(UV-Vis)absorption spectra of metal nanoclusters(NCs)as a demonstration,we develop a machine-learningbased method to unravel the compositions of metal NCs behind the“featureless”spectra.By implementing a one-dimensional convolutional neural network,good matches between prediction results and experimental results and low mean absolute error values are achieved on these optical absorption spectra that human cannot interpret.This work opens a door for the identification of nanomaterials at molecular precision from their optical properties,paving the way to rapid and high-throughput characterizations.
基金supported by the National Natural Science Foundation of China(51832007)the Natural Science Foundation of Shandong Province(ZR2020ZD35)+1 种基金the Project of Shandong Institutes of Industrial Technology(Z1250020005)K.C.also acknowledges the Qilu Young Scholars Program of Shandong University.
文摘Lithium niobate is a well-known dielectric material and its defect microstructures have shown a huge impact on its acousto-optical,piezoelectric,and electro-optical properties.However,an understanding of the involved defect structures and identification of the chemical composition of lithium niobate are still not achieved due to the lack of sufficient methodologies.In this work,near-stoichiometric and non-stoichiometric lithium niobate powders were comprehensively studied by X-ray diffraction(XRD)and high-temperature Raman and UV-vis spectroscopy.
