surface plasmon resonance imaging detection of silver nanoparticle-tagged immunoglobulin by...

Surface plasmon resonance imaging detection of silver nanoparticle-tagged immunoglobulin

by Sharmistha Paul, Deepen Paul, George R. Fern, and Asim K. Ray

InterfaceVolume 8(61):1204-1211

August 7, 2011

©2011 by The Royal Society

Schematic of surface plasmon resonance imaging (SPRI).

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

Transmission electron microscopy (TEM) images of (a,b) AgNPs and (c) AgNP-functionalized anti-gIgG (AgNP–anti-gIgG) using a 200-mesh TEM grid as the mask.

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

Size distribution histograms of (a) AgNPs and (b) AgNP–anti-gIgG from the dynamic light scattering experiments.

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

UV–visible absorption spectra of 12.46 µg ml−1 AgNPs (dotted line), 11.9 mM anti-gIgG (dashed-dotted line) and AgNP–anti-gIgG (solid line) solution (diluted three times).

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

Comparison of SPRI reflectivity spectra of bare Au substrate (filled squares), modification with MUA (filled circles) and anti-goat immunoglobulin G (gIgG) (filled triangles) immobilization.

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

SPR image of the microarray goat immunoglobulin G (gIgG) spot: (a) 6.66 nM, (b) 660 nM at 552 nm (intensity in greyscale is shown at the bottom of the pictures) and (c) spatial distribution of

reflectivity (%) of the gIgG spot in the microarray (solid and b...

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

Response of Δ%R of immobilized anti-goat immunoglobulin G (gIgG) against the concentration of goat immunoglobulin G (gIgG) within the range of 6.66–660 nM.

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

SPR images of the microarrayed AgNP–anti-goat immunoglobulin G (gIgG) spot of (a) 6.66 nM and (b) 660 nM at 552 nm and (c) the spatial distribution of the reflectivity (%) of the spots (solid

and broken lines for 6.66 and 660 nM, respectively).

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society

Change in percentage of reflectivity (Δ%R) for different concentrations of goat immunoglobulin G (gIgG) with and without AgNPs at an SPRI wavelength of 552 nm (average over three

measurements).

Sharmistha Paul et al. J. R. Soc. Interface 2011;8:1204-1211

©2011 by The Royal Society