Gold molarity

(mM)

Peak wavelength (nm)

Absorbance at SPR peak

Absorbance at the lowest peak

Absorbance ratio

Theoretical particle diameter (nm)

Experimental particle diameter (nm)

Sigma – Aldrich values

0.1

524

0.1271

0.0710

1.7901

20 - 25

-

20

0.15

519

0.8278

0.5105

1.6216

14 - 16

10

10 - 15

0.2

522

1.1992

0.6982

1.7176

18 - 20

-

15 - 20

0.25

519

1.1373

0.6969

1.6319

14 - 16

11

10

0.3

520

1.974

1.2493

1.5801

12 - 14

-

15