저널명 : Colloids and Surfaces A, 518, 295-303 (2017) 
저자 : Nguyen Hoang Ly, Thanh Danh Nguyen, Thanh Lam Bui, Sangyeop Lee, Jaebum Choo, Sang-Woo Joo* 
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Abstract

We compared the adsorption and desorption of 1-pyrenecarboxylic acid (PyC), 1-pyreneacetic acid (PyA),and 1-pyrenebutyric acid (PyB) on silver nanoparticles (AgNPs) via interfacial spectroscopic tools to studythe role of the aliphatic units between pyrene and carboxylic group. The negative surface charges ofAgNPs at ca. −51 mV shifted up to −11 mV, after adsorbing hydrophobic pyrene compounds. The threepyrene acid compounds appeared to adsorb onto AgNPs via their carboxylate units by referring to theobservation of the broad (COO−) bands at 1380–1410 cm−1in the Raman spectra. X-ray photoelectronspectroscopy (XPS) also supported the C O species in the C1sregion. AgNPs were found to efficientlyquench the fluorescence of the three pyrene acid adsorbates. The highest Stern–Volmer constant of PyAmay be due to the largest overlap integral with the surface Plasmon absorption band of AgNPs. The butyricunit was expected to lead a stronger binding on Ag, as suggested by density functional theory (DFT) cal-culations. The adsorbed pyrene acid compounds appeared to be released from AgNPs by thiol-containingglutathione (GSH). PyB with the butyric group exhibited larger quenched fluorescence intensities andsmaller released amounts than PyC and PyA in aqueous solutions and A549 cancer cells. Our study willbe helpful in designing pyrene-based fluorescence sensors in cellular imaging.


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List of Articles
제목 저널명 저자 기타사항

2017 Spectroscopic measurements of interactions between hydrophobic 1-pyrenebutyric... file

저널명 Colloids and Surfaces A, 518, 295-303 (2017) 

저자 Nguyen Hoang Ly, Thanh Danh Nguyen, Thanh Lam Bui, Sangyeop Lee, Jaebum Choo, Sang-Woo Joo* 

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저널명 Journal of Molecular Structure, 1128, 215-220 (2017) 

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저널명 Sensor and Actuators B, 240, 358-364 (2017) 

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2016 Early Diagnosis of Influenza Virus A Using SERS-based Lateral Flow Assay file

저널명 Bulletin of the Korean Chemical Society, 37, 2019-2024 (2016) 

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2016 Surface-Enhanced Raman Scattering and Fluorescence-Based Dual Nanoprobes for ... file

저널명 Journal of Biomedical Nanotechnology, 12, 1938-1951 (2016) 

저자 Hongdeok Jang, Eun Young Hwang, Yongshin Kim, Jaebum Choo, Jihoon Jeong, and Dong Woo Lim* 

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2016 Scalable production of CuInS2/ZnS quantum dots in a two-step droplet-based mi... file

저널명 Journal of Materials Chemistry C, 4, 6401-6408 (2016) 

저자 Alexandra Yashina, Ioannis Lignos, Stavros Stavrakis, Jaebum Choo and Andrew J. deMello* 

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