Abstract
Acrylamide (AA) is a neurotoxin and potential carcinogen. It has been found in various thermally processed foods, e.g., potato chips and biscuits. Thus, simple, rapid, and sensitive methods for AA detection are needed to ensure food safety. Herein, the fabrication of a highly stable AA biosensor is presented. A boron-doped diamond (BDD) was modified by Pt and hemoglobin. In the first step, platinum nanoparticles (Pt NPs) were chemically seeded onto the BDD surface using NaBH as a reducing agent. The electrochemical overgrowth of these Pt NP seeds was conducted at a constant potential of -0.2 V in a 1 mM Pt solution. Then, rapid thermal annealing (RTA) of the BDD/Pt NP composite was conducted at 700 °C under N atmosphere to enhance its stability. After RTA, BDD/Pt NP was electrochemically activated between -0.5 and 1.5 V. Then, further overgrowth was performed using a deposition voltage of -0.2 V to renew the BDD/Pt NP surface. Finally, 0.15-mM hemoglobin was used to modify BDD/Pt NP. The characterization of the resulting surface was performed using scanning electron microscopy. The biosensor exhibited an optimal response (limit of detection = 0.012 nM) at pH 4.9 in a 0.2-M acetate buffer solution.
| Original language | English |
|---|---|
| Article number | 012011 |
| Journal | IOP Conference Series: Materials Science and Engineering |
| Volume | 496 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 22 Feb 2019 |
| Event | 2nd International Conference on Current Progress in Functional Materials 2017, ISCPFM 2017 - Bali, Indonesia Duration: 8 Nov 2017 → 9 Nov 2017 |
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Keywords
- acrylamide
- BDD
- biosensor
- hemoglobin
- platinum
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A boron-doped diamond electrode decorated with hemoglobin-modified platinum nanoparticles as a biosensor for acrylamide detection. / Wulandari, R.; Ivandini, T. A.; Saefudin, E.
In: IOP Conference Series: Materials Science and Engineering, Vol. 496, No. 1, 012011, 22.02.2019.Research output: Contribution to journal › Conference article › Research › peer-review
TY - JOUR
T1 - A boron-doped diamond electrode decorated with hemoglobin-modified platinum nanoparticles as a biosensor for acrylamide detection
AU - Wulandari, R.
AU - Ivandini, T. A.
AU - Saefudin, E.
PY - 2019/2/22
Y1 - 2019/2/22
N2 - Acrylamide (AA) is a neurotoxin and potential carcinogen. It has been found in various thermally processed foods, e.g., potato chips and biscuits. Thus, simple, rapid, and sensitive methods for AA detection are needed to ensure food safety. Herein, the fabrication of a highly stable AA biosensor is presented. A boron-doped diamond (BDD) was modified by Pt and hemoglobin. In the first step, platinum nanoparticles (Pt NPs) were chemically seeded onto the BDD surface using NaBH as a reducing agent. The electrochemical overgrowth of these Pt NP seeds was conducted at a constant potential of -0.2 V in a 1 mM Pt solution. Then, rapid thermal annealing (RTA) of the BDD/Pt NP composite was conducted at 700 °C under N atmosphere to enhance its stability. After RTA, BDD/Pt NP was electrochemically activated between -0.5 and 1.5 V. Then, further overgrowth was performed using a deposition voltage of -0.2 V to renew the BDD/Pt NP surface. Finally, 0.15-mM hemoglobin was used to modify BDD/Pt NP. The characterization of the resulting surface was performed using scanning electron microscopy. The biosensor exhibited an optimal response (limit of detection = 0.012 nM) at pH 4.9 in a 0.2-M acetate buffer solution.
AB - Acrylamide (AA) is a neurotoxin and potential carcinogen. It has been found in various thermally processed foods, e.g., potato chips and biscuits. Thus, simple, rapid, and sensitive methods for AA detection are needed to ensure food safety. Herein, the fabrication of a highly stable AA biosensor is presented. A boron-doped diamond (BDD) was modified by Pt and hemoglobin. In the first step, platinum nanoparticles (Pt NPs) were chemically seeded onto the BDD surface using NaBH as a reducing agent. The electrochemical overgrowth of these Pt NP seeds was conducted at a constant potential of -0.2 V in a 1 mM Pt solution. Then, rapid thermal annealing (RTA) of the BDD/Pt NP composite was conducted at 700 °C under N atmosphere to enhance its stability. After RTA, BDD/Pt NP was electrochemically activated between -0.5 and 1.5 V. Then, further overgrowth was performed using a deposition voltage of -0.2 V to renew the BDD/Pt NP surface. Finally, 0.15-mM hemoglobin was used to modify BDD/Pt NP. The characterization of the resulting surface was performed using scanning electron microscopy. The biosensor exhibited an optimal response (limit of detection = 0.012 nM) at pH 4.9 in a 0.2-M acetate buffer solution.
KW - acrylamide
KW - BDD
KW - biosensor
KW - hemoglobin
KW - platinum
UR - http://www.scopus.com/inward/record.url?scp=85066837629&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/496/1/012011
DO - 10.1088/1757-899X/496/1/012011
M3 - Conference article
VL - 496
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
SN - 1757-8981
IS - 1
M1 - 012011
ER -