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Nanomechanical characterization of chemical interaction between gold nanoparticles and chemical functional groups

Authors
 Gyudo Lee  ;  Hyungbeen Lee  ;  Kihwan Nam  ;  Jae-Hee Han  ;  Jaemoon Yang  ;  Sang Woo Lee  ;  Dae Sung Yoon  ;  Kilho Eom  ;  Taeyun Kwon 
Citation
 NANOSCALE RESEARCH LETTERS, Vol.7(1) : 608, 2012 
Journal Title
 NANOSCALE RESEARCH LETTERS 
ISSN
 1931-7573 
Issue Date
2012
Keywords
Au nanoparticle ; Dopamine ; Surface chemistry ; Atomic force microscopy ; Lateral force microscopy
Abstract
We report on how to quantify the binding affinity between a nanoparticle and chemical functional group using various experimental methods such as cantilever assay, PeakForce quantitative nanomechanical property mapping, and lateral force microscopy. For the immobilization of Au nanoparticles (AuNPs) onto a microscale silicon substrate, we have considered two different chemical functional molecules of amine and catecholamine (here, dopamine was used). It is found that catecholamine-modified surface is more effective for the functionalization of AuNPs onto the surface than the amine-modified surface, which has been shown from our various experiments. The dimensionless parameter (i.e., ratio of binding affinity) introduced in this work from such experiments is useful in quantitatively depicting such binding affinity, indicating that the binding affinity and stability between AuNPs and catecholamine is approximately 1.5 times stronger than that between amine and AuNPs. Our study sheds light on the experiment-based quantitative characterization of the binding affinity between nanomaterial and chemical groups, which will eventually provide an insight into how to effectively design the functional material using chemical groups.
Files in This Item:
T201204169.pdf Download
DOI
23113991
Appears in Collections:
5. Research Institutes (연구소) > Yonsei Integrative Research Institute for Cerebral & Cardiovascular Disease (뇌심혈관질환융합연구사업단) > 1. Journal Papers
Yonsei Authors
Yang, Jae Moon(양재문) ORCID logo https://orcid.org/0000-0001-7365-0395
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/91491
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