Malaysian Journal of Analytical Sciences Vol 22 No 3 (2018): 458 - 464

FABRICATION AND CHARACTERIZATION OF RUBY NANOPARTICLES

(Fabrikasi dan Pencirian Partikel Nano Delima)

Wan Aizuddin Wan Razali*, Azman Kasim , Syamsyir Akmal Senawi, Azhan Hashim, Norihan Yahya, Hartini Ahmad Rafaie

Faculty of Applied Sciences,

Universiti Teknologi MARA Pahang, 26400 Bandar Tun Abdul Razak Jengka, Pahang, Malaysia

*Corresponding author: wanaizuddin@pahang.uitm.edu.my

Received: 4 December 2016; Accepted: 1 December 2017

Abstract

Numerous works have been done on finding nanoparticles (NPs) with excellent optical properties. In this work, ruby (chromium doped alumina) nanoparticles have been prepared using femtosecond laser ablation. The synthesized nanoparticles were characterised using dynamic light scattering (DLS), transmission electron microscopy (TEM) and fluorescence microscopy. DLS analysis indicates that the particles size is approximately 52 nm. TEM analysis gives smaller particles size with mean size of 38 nm compared to DLS analysis. Spherical shape of the particles was observed through TEM image. The synthesized NPs showed excellent stability in water with +55 mV zeta potential value. The most efficient wavelengths to excite the ruby NPs were determined as 405 nm and 554 nm. The emission peak for the ruby NPs was at 690 nm which is corresponds to ²E-⁴A₂ transition. The synthesized ruby NPs can be applied as a potential bioimaging label

Keywords: ruby nanoparticles, femtosecond laser ablation, emission, bioimaging

Abstrak

Pelbagai usaha telah dilakukan bagi mencari partikel nano yang mempunyai sifat optik yang baik. Dalam kajian yang dilakukan, partikel nano delima (kromium dop alumina) adalah dihasilkan melalui pelelasan laser femto saat. Pencirian sintesis partikel nano adalah berdasarkan serakan cahaya dinamik (DLS), Mikroskopi elektron terhantar (TEM) dan mikroskopi pendarfluor. Analisis DLS menunjukkan saiz partikel adalah dalam linkungan 52 nm. Analisis TEM menandakan kewujudan saiz partikel lebih kecil dengan saiz purata pada julat 38 nm berbanding analisis DLS. Bentuk sfera pada partikel-partikel berkenaan dicerap melalui imej TEM. Partikel nano yang dihasilkan memberikan bacaan tahap kestabilan yang amat baik di dalam air pada beza keupayaan zeta 55 mV. Panjang gelombang yang cekap bagi mengujakan partikel nano delima adalah sekitar julat 405 nm dan 554 nm. Puncak sinaran bagi partikel nano delima adalah 690 nm iaitu mewakili anjakan ²E-⁴A₂. Partikel nano delima yang dihasilkan berpotensi untuk digunakan bagi tujuan penandaan imbasanbio.

Kata kunci: partikel nano delima, pelelasan laser femto saat, sinaran, imbasanbio

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