Tags

Type your tag names separated by a space and hit enter

Poly-L-lysine-coated silver nanoparticles as positively charged substrates for surface-enhanced Raman scattering.
Langmuir. 2012 Sep 18; 28(37):13166-71.L

Abstract

Positively charged nanoparticles to be used as substrates for surface-enhanced Raman scattering (SERS) were prepared by coating citrate-reduced silver nanoparticles with the cationic polymer poly-l-lysine. The average diameter of the coated nanoparticles is 75 nm, and their zeta potential is +62.3 ± 1.7 mV. UV-vis spectrophotometry and dynamic light scattering measurements show that no aggregation occurs during the coating process. As an example of their application, the so-obtained positively charged coated particles were employed to detect nanomolar concentrations of the anionic chromophore bilirubin using SERS. Because of their opposite charge, bilirubin molecules interact with the coated nanoparticles, allowing SERS detection. The SERS intensity increases linearly with concentration in a range from 10 to 200 nM, allowing quantitative analysis of bilirubin aqueous solutions.

Authors+Show Affiliations

Centre of Excellence for Nanostructured Materials and Department of Industrial and Information Engineering, University of Trieste, Italy.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22958086

Citation

Marsich, Lucia, et al. "Poly-L-lysine-coated Silver Nanoparticles as Positively Charged Substrates for Surface-enhanced Raman Scattering." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 28, no. 37, 2012, pp. 13166-71.
Marsich L, Bonifacio A, Mandal S, et al. Poly-L-lysine-coated silver nanoparticles as positively charged substrates for surface-enhanced Raman scattering. Langmuir. 2012;28(37):13166-71.
Marsich, L., Bonifacio, A., Mandal, S., Krol, S., Beleites, C., & Sergo, V. (2012). Poly-L-lysine-coated silver nanoparticles as positively charged substrates for surface-enhanced Raman scattering. Langmuir : the ACS Journal of Surfaces and Colloids, 28(37), 13166-71. https://doi.org/10.1021/la302383r
Marsich L, et al. Poly-L-lysine-coated Silver Nanoparticles as Positively Charged Substrates for Surface-enhanced Raman Scattering. Langmuir. 2012 Sep 18;28(37):13166-71. PubMed PMID: 22958086.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Poly-L-lysine-coated silver nanoparticles as positively charged substrates for surface-enhanced Raman scattering. AU - Marsich,Lucia, AU - Bonifacio,Alois, AU - Mandal,Subhra, AU - Krol,Silke, AU - Beleites,Claudia, AU - Sergo,Valter, Y1 - 2012/09/07/ PY - 2012/9/11/entrez PY - 2012/9/11/pubmed PY - 2013/1/25/medline SP - 13166 EP - 71 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 28 IS - 37 N2 - Positively charged nanoparticles to be used as substrates for surface-enhanced Raman scattering (SERS) were prepared by coating citrate-reduced silver nanoparticles with the cationic polymer poly-l-lysine. The average diameter of the coated nanoparticles is 75 nm, and their zeta potential is +62.3 ± 1.7 mV. UV-vis spectrophotometry and dynamic light scattering measurements show that no aggregation occurs during the coating process. As an example of their application, the so-obtained positively charged coated particles were employed to detect nanomolar concentrations of the anionic chromophore bilirubin using SERS. Because of their opposite charge, bilirubin molecules interact with the coated nanoparticles, allowing SERS detection. The SERS intensity increases linearly with concentration in a range from 10 to 200 nM, allowing quantitative analysis of bilirubin aqueous solutions. SN - 1520-5827 UR - https://www.unboundmedicine.com/medline/citation/22958086/Poly_L_lysine_coated_silver_nanoparticles_as_positively_charged_substrates_for_surface_enhanced_Raman_scattering_ DB - PRIME DP - Unbound Medicine ER -