Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties

Polymer-based nanocomposites have attracted a lot of attention for amperometric biosensor development due to their general physical and chemical properties including biocompatibility, film-forming ability, stability and different functional groups that can be bonded with other biomolecues. In this s...

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Main Authors:	Jiajia Long, Azlin Suhaida Azmi, Kim, Minsoo P., Fathilah Ali
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:	http://journalarticle.ukm.my/11127/ http://journalarticle.ukm.my/11127/ http://journalarticle.ukm.my/11127/1/12%20Jiajia%20Long.pdf

id	ukm-11127
recordtype	eprints
spelling	ukm-111272017-12-21T04:44:29Z http://journalarticle.ukm.my/11127/ Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties Jiajia Long, Azlin Suhaida Azmi, Kim, Minsoo P. Fathilah Ali, Polymer-based nanocomposites have attracted a lot of attention for amperometric biosensor development due to their general physical and chemical properties including biocompatibility, film-forming ability, stability and different functional groups that can be bonded with other biomolecues. In this study, poly-4-vinlyridine homopolymer (P4VP) and polylactic acid-block-poly(2-vinylpyridine) block copolymer (PLA-b-P2VP) were used to hybridize with gold precursors (Au3+) based on the association between the nitrogen of the pyridine group of P4VP or P2VP block with gold precursors. P4VP/Au3+ and PLA-b-P2VP/Au3+ nanocomposites were prepared with ratio of gold to P2VP or P4VP (10:1). The Au3+ in both polymers was reduced to gold nanoparticles (AuNPs) via in-situ approach by using hydrazine. Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), transmission electron microscopy (TEM) and cyclic voltammetry (CV) were used to characterize the structural, morphological and electrochemical properties of the nanocomposites. The peak currents of P4VP/AuNPs and PLA-b-P2VP/AuNPs nanocomposites modified electrode were 6.685 nA and 69.432 nA, respectively, which are much lower than bare electrode (205.019 nA) due to the non-conductivity of P4VP and PLA-b-P2VP. In order to improve the electron transfer capability of electrode, graphene oxide (GO) was blended and electrochemically reduced to obtain P4VP/AuNPs/rGO and PLA-b-P2VP/AuNPs/rGO nanocomposites. After immobilization of these two nanocomposites on electrode through drop casting method, the peak currents of P4VP/AuNPs/rGO and PLA-b-P2VP/AuNPs/rGO nanocomposites modified electrode were 871.172 nA and 663.947 nA, respectively, which are much higher than bare electrode (205.019 nA) and shown good capability to accelerate electron transfer. Based on these characterizations, P4VP/AuNPs/rGO has potential as the nanocomposite to modify the electrode for enzymatic biosensor development. Penerbit Universiti Kebangsaan Malaysia 2017-07 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11127/1/12%20Jiajia%20Long.pdf Jiajia Long, and Azlin Suhaida Azmi, and Kim, Minsoo P. and Fathilah Ali, (2017) Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties. Sains Malaysiana, 46 (7). pp. 1097-1102. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid46bil7_2017/KandunganJilid46Bil7_2017.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Polymer-based nanocomposites have attracted a lot of attention for amperometric biosensor development due to their general physical and chemical properties including biocompatibility, film-forming ability, stability and different functional groups that can be bonded with other biomolecues. In this study, poly-4-vinlyridine homopolymer (P4VP) and polylactic acid-block-poly(2-vinylpyridine) block copolymer (PLA-b-P2VP) were used to hybridize with gold precursors (Au3+) based on the association between the nitrogen of the pyridine group of P4VP or P2VP block with gold precursors. P4VP/Au3+ and PLA-b-P2VP/Au3+ nanocomposites were prepared with ratio of gold to P2VP or P4VP (10:1). The Au3+ in both polymers was reduced to gold nanoparticles (AuNPs) via in-situ approach by using hydrazine. Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), transmission electron microscopy (TEM) and cyclic voltammetry (CV) were used to characterize the structural, morphological and electrochemical properties of the nanocomposites. The peak currents of P4VP/AuNPs and PLA-b-P2VP/AuNPs nanocomposites modified electrode were 6.685 nA and 69.432 nA, respectively, which are much lower than bare electrode (205.019 nA) due to the non-conductivity of P4VP and PLA-b-P2VP. In order to improve the electron transfer capability of electrode, graphene oxide (GO) was blended and electrochemically reduced to obtain P4VP/AuNPs/rGO and PLA-b-P2VP/AuNPs/rGO nanocomposites. After immobilization of these two nanocomposites on electrode through drop casting method, the peak currents of P4VP/AuNPs/rGO and PLA-b-P2VP/AuNPs/rGO nanocomposites modified electrode were 871.172 nA and 663.947 nA, respectively, which are much higher than bare electrode (205.019 nA) and shown good capability to accelerate electron transfer. Based on these characterizations, P4VP/AuNPs/rGO has potential as the nanocomposite to modify the electrode for enzymatic biosensor development.
format	Article
author	Jiajia Long, Azlin Suhaida Azmi, Kim, Minsoo P. Fathilah Ali,
spellingShingle	Jiajia Long, Azlin Suhaida Azmi, Kim, Minsoo P. Fathilah Ali, Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
author_facet	Jiajia Long, Azlin Suhaida Azmi, Kim, Minsoo P. Fathilah Ali,
author_sort	Jiajia Long,
title	Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
title_short	Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
title_full	Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
title_fullStr	Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
title_full_unstemmed	Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
title_sort	comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2017
url	http://journalarticle.ukm.my/11127/ http://journalarticle.ukm.my/11127/ http://journalarticle.ukm.my/11127/1/12%20Jiajia%20Long.pdf
first_indexed	2023-09-18T19:59:27Z
last_indexed	2023-09-18T19:59:27Z
_version_	1777406750136205312

Comparative study of poly(4-vinylpyridine) and polylactic acid-block-poly(2-vinylpyridine) nanocomposites on structural, morphological and electrochemical properties

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