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A high yield, one-pot dialysis-based process for self-assembly of near infrared absorbing gold nanop
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2018-08-31 10:11 457閱讀次數(shù)
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Hypothesis:Afacile,dialysis-basedsynthesisofstablenearinfrared(nIR)absorbingplasmonicgoldnanoparticles(kmax=6501000nm)willincreasetheyieldofnIRparticlesandreducetheamountofgoldcolloidcontaminantintheproductmixture.Experiments:Chloroauricacidandsodiumthiosulfatewerereactedusingadialysismembraneasareactionvessel.Productyieldandcompositionwasdeterminedandcomparedtotraditionalsynthesismethods.Theproductparticledistribution,yield,andpartitioningofgoldbetweendispersedproductandmembrane-adsorbedgoldweredetermined.Findings:Thesynthesisresultsinpolydisperseparticlesuspensionscomprisedof70%spheroid-likeparticles,27%triangularplates,and3%rod-likestructureswitha3%batch-to-batchvariationandaprominentnIRabsorptionbandwithkmax=6501000nm.Theamountofsmallgoldcolloid(kmax=530nm;d<10nm)intheisolatedproductwasreducedby96%comparedtotraditionalmethods.Additionally,91.1%ofthegoldstartingmaterialisretainedinthesolution-basednanoparticlemixturewhile8.2%isfoundonthedialysismembrane.Thesynthesisresultsinaqualityratio(QR=AbsnIR/Abs530)of1.72.4(twicethatofprevioustechniques)and14.3timesgreaterODmlyieldofthenIR-absorbingnanoparticlefraction.
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A high yield, one-pot dialysis-based process for self-assembly of near infrared absorbing gold nanop- Hypothesis:Afacile,dialysis-basedsynthesisofstablenearinfrared(nIR)absorbingplasmonicgoldnanoparticles(kmax=6501000nm)willincreasetheyieldofnIRparticlesandreducetheamountofgoldcolloidcontaminantintheproductmixture.Experiments:Chloroauricacidandsodiumthiosulfatewerereactedusingadialysismembraneasareactionvessel.Productyieldandcompositionwasdeterminedandcomparedtotraditionalsynthesismethods.Theproductparticledistribution,yield,andpartitioningofgoldbetweendispersedproductandmembrane-adsorbedgoldweredetermined.Findings:Thesynthesisresultsinpolydisperseparticlesuspensionscomprisedof70%spheroid-likeparticles,27%triangularplates,and3%rod-likestructureswitha3%batch-to-batchvariationandaprominentnIRabsorptionbandwithkmax=6501000nm.Theamountofsmallgoldcolloid(kmax=530nm;d<10nm)intheisolatedproductwasreducedby96%comparedtotraditionalmethods.Additionally,91.1%ofthegoldstartingmaterialisretainedinthesolution-basednanoparticlemixturewhile8.2%isfoundonthedialysismembrane.Thesynthesisresultsinaqualityratio(QR=AbsnIR/Abs530)of1.72.4(twicethatofprevioustechniques)and14.3timesgreaterODmlyieldofthenIR-absorbingnanoparticlefraction.[詳細]
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2018-08-31 10:11
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