Investigation on the Effect of Centrifugation Speed on the Shape Separation of Gold Nanorods

  • Abstract
  • Keywords
  • References
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  • Abstract

    High-quality gold nanorods (AuNRs) with a uniform aspect ratio and sizes are crucial for applications in biomedical or sensor industry. AuNRs is implementing Localized Surface Plasmon Resonance (LSPR) as sensing method which is highly dependent on the size, separation of nanoparticles, aspect ratio and the shape of the nanoparticles. Thus, in this process, the shape, surface density and aspect ratio of AuNRs were investigated to be used further as LSPR sensing material. The AuNRs was prepared using Seed Mediated Growth Method (SMGM) and the growth solution of the AuNRs was centrifuged with the speed ranging from 2500 rpm to 5000 rpm to separate the particles shaper prior to deposition as thin film. The XRD result shows the peak at 2θ = 38º which shows the (111) crystal orientation of the AuNRs. There are also two distinct peaks formed at the absorption spectra graph obtained from the UV-Vis result which associated with transverse plasmon peak (t-LSPR) and longitudinal plasmon peak (l-LSPR). The t-LSPR peak is significantly smaller than the l-LSPR and located in the wavelength ranges from 500 nm to 560 nm whereas the l-LSPR of the AuNRs shows a stronger and a higher peak which is located in the wavelength ranges from 700 nm to 780 nm. The morphological analysis using FESEM shows that the higher centrifugation speed separates the AuNRs with higher aspect ratio and higher surface density.

  • Keywords

    Centrifugation; Gold Nanorod, Separation Speed; Localized Surface Plasmon Resonance; Plasmonic Sensor

  • References

      [1] Morsin M, Salleh MMM, Umar MAA & Sahdan MZ, “Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor”, Sensors, Vol.17, Vol.5, (2017), pp. 947.

      [2] Gulati A, Liao H & JH Hafner, “Monitoring Gold Nanorod Synthesis by Localized Surface Plasmon Resonance”, J. Phys. Chem. B, Vol. 110, No.45, (2006), pp. 22323–22327.

      [3] Wang J, Zhang HZ, Li RS & Huang CZ, “Localized surface plasmon resonance of gold nanorods and assemblies in the view of biomedical analysis”, Anal. Chem., Vol.80, (2016), pp. 429–443.

      [4] Nikoobakht B & El Sayed, “Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed - Mediated Growth Method”, Chem. Mater., Vol.15, No.16, (2003), pp. 1957–1962.

      [5] AJ Haes, Stuart DA, Nie S & Duyne RPV, “Using solution-phase nanoparticles, surface-confined nanoparticle arrays and single nanoparticles as biological sensing platforms”, J. Fluoresc., Vol.14, No 4, (2004), pp. 355–367.

      [6] Morsin M, Umar AA, Salleh MM, Majlis BY, “High sensitivity localized surface plasmon resonance sensor of gold nanoparticles: Surface density effect for detection of boric acid. In Semiconductor Electronics (ICSE), 2012 10th IEEE International Conference on, (2012)pp. 352-356,

      [7] Nengsih S, Umar AA, Salleh MM & Oyama M, “Detection of formaldehyde in water: A shape-effect on the plasmonic sensing properties of the gold nanoparticles”, Sensors, Vol.12, No.8, (2012), pp. 10309–10325.

      [8] Ma ZY, Xia HX, Liu YP, Liu B, Chen W & Di Zhao Y, “Applications of gold nanorods in biomedical imaging and related fields”, Chinese Sci. Bull., Vol.58, No.21, (2013), pp. 2530–2536.

      [9] Song JH, Kim F, Kim D & Yang P “Crystal overgrowth on gold nanorods: Tuning the shape, facet, aspect ratio, and composition of the nanorods”, Chem. - A Eur. J., Vol.11, No.3, (2005), pp. 910–916.

      [10] Boksebeld M, Blanchard NP, Jaffal A, Chevolot Y & Monnier V, “Shape-selective purification of gold nanorods with low aspect ratio using a simple centrifugation method”, Gold Bull., Vol.50, No.1, (2017), pp. 69–76.

      [11] Kimling J, Maier M, Okenve B, Kotaidis V, Ballot H & Plech A, “Turkevich Method for Gold Nanoparticle Synthesis Revisited”, J. Phys. Chem. B, Vol.110, (2006), pp. 15700–15707,

      [12] Uehara A, Booth SG, Chang SY, Schroeder SL, Imai T, Hashimoto T, Mosselmans JF, Dryfe RA, “Electrochemical Insight into the Brust-Schiffrin Synthesis of Au Nanoparticles”, J. Am. Chem. Soc., Vol.137, No.48, (2015), pp. 15135–15144.

      [13] Rama S, Perala K & Kumar S, “On the Mechanism of Metal Nanoparticle Synthesis in the Brust− Schiffrin Method”, Langmuir, Vol.29, No.31, (2013), pp. 9863–9873.

      [14] Ma X, Wang MC, You F, Feng J & Zhao X, “Optical properties and microstructure of Au nanorods via seed solution amount variation synthesized by seed-mediated growth method”, J. Alloys Compd., Vol.649, (2015), pp. 617–624.

      [15] Sharma V, Park K & Srinivasarao M, “Shape separation of gold nanorods using centrifugation”, Vol.106, No.13, (2009), pp. 4981–4985.




Article ID: 22302
DOI: 10.14419/ijet.v7i4.30.22302

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