Sains Malaysiana 46(7)(2017): 1119–1124

http://dx.doi.org/10.17576/jsm-2017-4607-15

 

Transport Properties and Sensing Responses of Platinum Nanoparticles/Graphene Structure Fabricated by Thermal Annealing Process

(Sifat Pengangkutan dan Tindak Balas Pengesanan Struktur Nanopartikel/Grafin Platinum melalui Proses Penyepuhlindapan Termal)

 

MOHAMMAD SARWAN MOHD SANIF¹, AMGAD AHMED ALI¹, LEE MAI WOON²,

LEE HING WAH², DANIEL BIEN CHIA SHENG³ & ABDUL MANAF HASHIM¹*

 

¹Malaysia-Japan International Institute of Technologym Universiti Teknologi Malaysia,

Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Federal Territory, Malaysia

 

²MIMOS Berhad, Technology Park Malaysia, 57000 Kuala Lumpur, Federal Territory,

Malaysia

 

³Nano Malaysia Berhad, 157 Hampshire Place, Jalan Mayang Sari, 50450 Kuala Lumpur,

Federal Territory, Malaysia

 

Received: 26 December 201/ Accepted: 27 February 2017

 

ABSTRACT

The effects of the annealing temperatures and thicknesses on the shapes, sizes and arrangement of platinum (Pt) nanoparticles (NPs) on graphene and their sensing performance for hydrogen (H2) detection were investigated. It shows strong dependency of the annealing temperatures and thicknesses on the properties of NPs. It was found that the proposed technique is able to form the NPs with good size controllability and uniformity even for thick deposited layer, thus eliminating the requirement of very thin layer of below 5 nm for the direct NP synthesis by evaporation or sputtering. The transport properties of Pt NPs/graphene structure and its sensing performance on H2 at room temperature under various H2 concentration were evaluated. The results showed an acceptable sensing response, indicating an innovative approach to fabricate Pt NPs embedded graphene for gas sensing application.

 

Keywords: Graphene; hydrogen; nanoparticles; platinum; sensors

 

ABSTRAK

Kesan suhu penyepuhlindapan dan ketebalan pada bentuk, saiz dan susunan nanopartikel (NP) platinum (Pt) pada grafin dan prestasi penderiaan pada pengesanan hidrogen (H2) telah dikaji. Ia menunjukkan kebergantungan yang kuat oleh suhu penyepuhlindapan dan ketebalan pada ciri NP seperti ini. Didapati bahawa teknik yang dicadangkan boleh membentuk NP yang mempunyai pengawalan saiz yang baik dan keseragaman walaupun pada lapisan yang diendap itu tebal dan menghapuskan keperluan lapisan yang sangat nipis di bawah 5 nm untuk sintesis NP secara langsung melalui penyejatan atau percikan. Prestasi penderiaan H2 pada suhu bilik dalam kepekatan H2 0.5-5.0% dicairkan dalam nitrogen mendedahkan respon penderiaan yang boleh diterima, menunjukkan pendekatan yang inovatif untuk fabrikasi NP Pt tertanam pada grafin sebagai penderiaan gas.

 

Kata kunci: Grafin; hidrogen; nanopartikel; pengesanan; platinum

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*Corresponding author; email: abdmanaf@utm.my