One-step wet chemical synthesis of gold nanoplates on solid substrate using poly-L-lysine as a reducing agent

Suratun Nafisah, Marlia Morsin, Nur Anida Jumadi, Nafarizal Nayan, Nur Zehan An nisa Md Shah, Nur Liyana Razali, Muhamad Mat Salleh

Research output: Contribution to journalArticle

Abstract

A one-step wet chemical approach or seedless growth process has several advantages compared to the traditional seed-mediated growth method (SMGM), such as being simpler and not requiring a multistep growth of seeds. This study had introduced a one-step wet chemical method to synthesis gold nanoplates on a solid substrate. The synthesis was carried out by simply immersing clean ITO substrate into a solution, which was made from mixing of gold chloride (precursor), cetyltrimethylammonium bromide or CTAB (stabilizing agent), and poly-L-lysine or PLL (reducing agent). Consequently, the size of the nanoplates in the range of (0.40 – 0.89) μm and a surface density within the range (21.89–57.19) % can be easily controlled by changing the concentration of PLL from 0.050 to 0.100 w/v % in H2O. At low PLL concentrations, the reduction of the gold precursor by PLL is limited, leading to the formation of gold nanoplates with a smaller size and surface density. The study on the sample by using energy-dispersive x-ray spectroscopy (EDS) confirmed that gold peaks occurred. The optical properties of the samples were examined by a UV–vis Spectrophotometer and showed that there was no strong surface plasmon resonance band observed at UV–vis and infrared regions, which agreed to micron-sized gold nanoplates. • Gold nanoplates synthesized on the substrate using a simple one-step wet chemical synthesis approach with poly-L-lysine (PLL) as a reducing agent and CTAB as a stabilizing agent.• The nanoplate's size and surface density was strongly dependent on the concentration of PLL.• Gold nanoplates synthesized using PLL with a concentration 0.050% showed perfect triangular shape, less by-products and more homogenous in size.

Original languageEnglish
Pages (from-to)1618-1625
Number of pages8
JournalMethodsX
Volume5
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Reducing Agents
Gold
Lysine
Substrates
Excipients
Seed
Seeds
Growth
Surface Plasmon Resonance
Spectrophotometers
Surface plasmon resonance
Byproducts
Energy dispersive spectroscopy
Spectrum Analysis
Optical properties
X-Rays
Spectroscopy
Infrared radiation
X rays

Keywords

  • Gold nanoparticles
  • Gold nanoplates
  • Localized surface plasmon resonance
  • One-step wet chemical synthesis of Gold Nanoplates on Solid Substrate Using Poly-L-lysine as Reducing Agent
  • Plasmonic sensor

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Medical Laboratory Technology

Cite this

One-step wet chemical synthesis of gold nanoplates on solid substrate using poly-L-lysine as a reducing agent. / Nafisah, Suratun; Morsin, Marlia; Jumadi, Nur Anida; Nayan, Nafarizal; Md Shah, Nur Zehan An nisa; Razali, Nur Liyana; Mat Salleh, Muhamad.

In: MethodsX, Vol. 5, 01.01.2018, p. 1618-1625.

Research output: Contribution to journalArticle

Nafisah, Suratun ; Morsin, Marlia ; Jumadi, Nur Anida ; Nayan, Nafarizal ; Md Shah, Nur Zehan An nisa ; Razali, Nur Liyana ; Mat Salleh, Muhamad. / One-step wet chemical synthesis of gold nanoplates on solid substrate using poly-L-lysine as a reducing agent. In: MethodsX. 2018 ; Vol. 5. pp. 1618-1625.
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