TY - JOUR
T1 - Highly Stable 11-MUA Capped Gold Nanobipyramid for Refractive Index Sensing
AU - Deviprasada, Prajna N.
AU - Sinha, Rajeev K.
N1 - Funding Information:
Financial support from the Department of Science and Technology (DST) India under the project grant number IDP/BDTD/11/2019 is gratefully acknowledged. Prajna N D acknowledges the TMA Pai Ph. D. fellowship from the Manipal Academy of Higher Education (MAHE).
Publisher Copyright:
© 2023 Journal of Biomedical Photonics & Engineering.
PY - 2023
Y1 - 2023
N2 - Gold nanobipyramids (Au NBPs) are nanostructures with narrow plasmon resonances, which make them suitable for sensing applications. In the present work, Au NBPs of different aspect ratios were synthesized using a seed-mediated growth method by tuning the seed volume. The usual capping molecule CTAB was replaced by 11-mercaptoundecanoic acid (11-MUA), and the nanoparticle stability was studied. The 11-MUA capped NBPs were found to be more stable compared to the CTAB capped NBPs. The bulk refractive index sensitivities of all Au NBPs of CTAB and 11-MUA capped NBPs were measured using sucrose solutions of different weight percentages (0–30%). 11-MUA capped Au NBPs showed better refractive index sensitivity than CTAB capped Au NBPs. The NBPs of aspect ratio 3 showed maximum sensitivity of 353 nm/RIU.
AB - Gold nanobipyramids (Au NBPs) are nanostructures with narrow plasmon resonances, which make them suitable for sensing applications. In the present work, Au NBPs of different aspect ratios were synthesized using a seed-mediated growth method by tuning the seed volume. The usual capping molecule CTAB was replaced by 11-mercaptoundecanoic acid (11-MUA), and the nanoparticle stability was studied. The 11-MUA capped NBPs were found to be more stable compared to the CTAB capped NBPs. The bulk refractive index sensitivities of all Au NBPs of CTAB and 11-MUA capped NBPs were measured using sucrose solutions of different weight percentages (0–30%). 11-MUA capped Au NBPs showed better refractive index sensitivity than CTAB capped Au NBPs. The NBPs of aspect ratio 3 showed maximum sensitivity of 353 nm/RIU.
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U2 - 10.18287/JBPE23.09.010308
DO - 10.18287/JBPE23.09.010308
M3 - Article
AN - SCOPUS:85153586686
SN - 2411-2844
VL - 9
JO - Journal of Biomedical Photonics and Engineering
JF - Journal of Biomedical Photonics and Engineering
IS - 1
M1 - 010308
ER -