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Code covered by the BSD License

Diffmaps(S,varargin)
InToCarbRatio=InorgMap1(S,Thr... Calculates the % sp2 of a stack (S.spectr) region specified by linidxin
LabelMat=ConstThresh(ImIn,Thr... Give the binary matrix of components over a constant threshold
LoadStackRaw(filedir) function S=LoadStackRaw(filedir)
ProcDir(RawDir,FinDir,varargi... This script processes stxm data found in "RawDir" and places it in P1Dir
S=AlignStack(stack) FTAlignStack
S=MultPartAvSpec(S,varargin) This script loops over each particle and calculates an aveage spectrum.
S=OdStack(structin,method) function S=OdStack(structin,method)
S=PartLabelCompSize(S,varargi... PartLabel Assigns particle labels to particles
S=ParticleSize(S) RC Moffet 2010
SingStackProc(RawDir,FinDir,N... This script processes stxm data found in "RawDir" and places it in
Snew=DeglitchStack(S,badEnerg... DeglitchStack
[Aout]=InorgMap(S,Mask) Calculates the % sp2 of a stack (S.spectr) region specified by linidxin
[OutSpec]=SumSpec(CellSpec,To... Adds spectra together?
[class,siz]=ChemSiz(Sin) Give Labels and size for plotting chemical size distributions
[out]=LabelCount(Sin) This script counts particles containing component labels. Run DiffMaps
[specout,npix]=ComponentSpec(... uses maps to isolate regions of interest to extract a spectrum.
map=PeakDetect(S,IaRange,IbRa... This script was originally written to detect potassium peaks. Therefore
1ExampleMasterRun.m
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5.0 | 1 rating Rate this file 9 Downloads (last 30 days) File Size: 1.2 MB File ID: #29085

STXM Spectromicroscopy Particle Analysis Routines

19 Oct 2010

Spectromicroscopic analysis of atmospheric nanoparticles (aerosols)

File Information
Description	An automated data analysis method for atmospheric particles using scanning transmission X-ray microscopy coupled with near edge X-ray fine structure spectroscopy (STXM/NEXAFS). This method is applied to complex internally mixed submicron particles containing organic and inorganic material. Several algorithms were developed to exploit NEXAFS spectral features in the energy range from 278-320 eV for quantitative mapping of the spatial distribution of elemental carbon, organic carbon, potassium, and non-carbonaceous elements in particles of mixed composition. This energy range encompasses the carbon K-edge and potassium L2 and L3 edges. STXM/NEXAFS maps of different chemical components were complemented with a subsequent analysis using elemental maps obtained by scanning electron microscopy coupled with energy dispersive X-ray analysis (SEM/EDX). We demonstrate application of the automated mapping algorithms for data analysis and the statistical classification of particles.
Required Products	Image Processing Toolbox
MATLAB release	MATLAB 7.7 (R2008b)

Tags for This File
Everyone's Tags	aerosol, analysis, atmospheric, carbonate, chemistry(2), inorganic, internally mixed, nanoparticle, nexafs(2), organic carbon, physics(2), potassium, soot, specromicroscopy, spectral imaging, statistical analysis, stxm, synchrotron, xanes, xray
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Comments and Ratings (3)
08 Nov 2010	Ryan Moffet	This is related to the submission by Tobias Henn.
08 Nov 2010	Tobias Henn	The scripts are related to the following publication: http://pubs.acs.org/doi/abs/10.1021/ac1012909
09 Nov 2010	Ryan Moffet	See also http://www.mathworks.com/matlabcentral/fileexchange/24006-stxm-data-analysis-script-collection-stacklab

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