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Optical extinction coefficients of gold nanoparticle aggregates by small angle X-ray scattering (SAXS)
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نویسنده
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chong j.-c. ,bidin n. ,lee s.-l. ,sanagi m.m. ,rugmai s. ,soontaranon s.
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منبع
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journal of physical science - 2017 - دوره : 28 - شماره : 1 - صفحه:61 -71
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چکیده
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The size distribution of gold hydrosol aggregates induced by ascorbic acid has been characterised by small angle x-ray scattering (saxs). the results are used to compute the extinction coefficients around the localised surface plasmon resonance (lspr) wavelengths and verified by comparing experimental extinction spectra obtained via spectrophotometry. citrate refluxed gold nanoparticles with initial ionic ratio of 0.94 measured by fitting an averaged intensity profile from two scattering lengths exhibit lognormal distribution with mean diameter of 27.4 nm (σd = 14.4 nm),while ascorbic acid induced agglomeration on gold nanoparticles at ph of 3.2 has mean diameter of 51.2 nm (σd = 19.2 nm). both experiment and simulated optical extinction shows agreement in lspr peak wavelength corresponding to their respective mean particle sizes. © penerbit universiti sains malaysia,2017.
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کلیدواژه
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Gold hydrosol; Gold nanoparticles; Induced agglomeration; Optical extinction coefficient; Small angle x-ray scattering (SAXS)
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آدرس
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laser centre,universiti teknologi malaysia,skudai,johor, Malaysia, laser centre,universiti teknologi malaysia,skudai,johor, Malaysia, ibnu sina institute,universiti teknologi malaysia,skudai,johor, Malaysia, nanotechnology research alliance,universiti teknologi malaysia,skudai,johor, Malaysia, school of physics,suranaree university of technology,111 university avenue,nakhon ratchasima,thailand,synchrotron light research institute,suranaree university of technology,111 university avenue,nakhon ratchasima, Thailand, synchrotron light research institute,suranaree university of technology,111 university avenue,nakhon ratchasima, Thailand
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Authors
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