Abstract
A core-shell Rhodamine B-doped SiO2 nanoparticle was synthesized and its fluorescent intensity was found to be 1000 times higher than that of individual Rhodamine B molecule. The doped nanoparticles were further conjugated with streptavidin and the resulting nanoparticles were used in the detection of reverse-phase protein microarrays, in which human IgG of various concentrations was first immobilized on aldehyde-modified glass slides and then biotinlyated goat anti human IgG as well as the labeled nanoparticles were sequentially conjugated. The calibration curve is linear over the range from 800 fg to 500 pg and the limit of detection is 100 fg, which is 8 times lower than that of streptavidin-labeled Cy3 fluorescent dyes. The dye-doped SiO2 nanoparticles show potentials for the protein array detection.
Similar content being viewed by others
References
Caiazzo Jr RJ, Maher AJ, Drummond MP, Lander CI, Tassinari OW, Nelson BP, Liu BCS. Protein microarrays as an application for disease biomarkers. Proteomics Clin Appl, 2009, 3: 138–147
Sassolas A, Leca-Bouvier BD, Blum LJ. DNA Biosensors and microarrays. Chem Rev, 2008, 108: 109–139
Schäferling M, Nagl S. Optical technologies for the read out and quality control of DNA and protein microarrays. Anal Bioanal Chem, 2006, 385: 500–517
Nagl S, Schäferling M, Wolfbeis OS. Fluorescence analysis in microarray technology. Microchim Acta, 2005, 151: 1–21
Wang L, Wang KM, Santra S, Zhao XJ, Hilliard LR, Smith JE, Wu YR, Tan WH. Glow in the biological world. Anal Chem, 2006, 1:647–654
Burns A, Ow H, Wiesner U. Fluorescent core-shell silica nanoparticles: towards “lab on a particle” architectures for nanobiotechnology. Chem Soc Rev, 2006, 35: 1028–1042
Wu H, Huo QS, Varnum S, Wang J, Liu GD, Nie ZM, Liu J, Lin YH. Dye-doped silica nanoparticle labels/protein microarray for detection of protein biomarkers. Analyst, 2008, 133: 1550–1555
Lian W, Litherland SA, Badrane H, Tan WH, Wu DH, Baker HV, Gulig PA, Lim DV, Jin SG. Ultrasensitive detection of biomolecules with fluorescent dye-doped nanoparticles. Anal Biochem, 2004, 334:135–144
Zhao XJ, Tapec-Dytioco R, Tan WH. Ultrasensitive DNA detection using highly fluorescent bioconjugated nanoparticle. J Am Chem Soc, 2003, 125: 11474–11475
Zhou XC, Zhou JZ. Improving the signal sensitivity and photostability of DNA hybridizations on microarrays by using dye-doped core-shell silica nanoparticles. Anal Chem, 2004, 76: 5302–5312
Verhaegh NAM, van Blaaderen A. Dispersions of rhodamine-labled silica sphere: synthesis, characterization, and fluorescence confocal scanning laser microscopy. Langmiur, 1994, 10: 1427–1438
He XX, Chen JY, Wang KM, Qin DL, Tan WH. Preparation of luminescent Cy5 doped core-shell SFNPs and its application as a near-infrared fluorescent marker. Talanta, 2007, 72: 1519–1526
van Blaaderen A, Vrij A. Synthesis and characterization of colloidal dispersion of fluorescent, monodisperse silica sphere. Langmiur, 1992, 2921–2931
Wang L, Tan WH. Multicolor FRET silica nanoparticles by single wavelength excitation. Nano lett, 2006, 6: 84–88
Author information
Authors and Affiliations
Corresponding authors
Additional information
Support from the National Natural Science Foundation of China (Grant Nos. 20575079, 20890020 & 20775033), the National Science Funds for Creative Research Groups (Grant No. 20821063), the National Basic Research Program of China (Grant Nos. 2006CB910803 & 2007CB936404), and the Opening Research Foundation of State Key Laboratory of Proteomics.
Rights and permissions
About this article
Cite this article
Wang, Y., Li, Z., Zhong, W. et al. Rhodamine B doped silica nanoparticle labels for protein microarray detection. Sci. China Chem. 53, 747–751 (2010). https://doi.org/10.1007/s11426-010-0104-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11426-010-0104-1