close

Se connecter

Se connecter avec OpenID

1 Supporting Information Structure-Function Relationships for SERS

IntégréTéléchargement
Supporting Information
Structure-Function Relationships for SERS-Active Plasmonic Paper
Michael B. Ross1,3, Michael J. Ashley2,3, Abrin L. Schmucker4, Srikanth Singamaneni5, Rajesh
R. Naik4*, George C. Schatz1,2,3*, Chad A. Mirkin1,2,3*
Department of Chemistry,1 Department of Chemical and Biological Engineering,2 and
International Institute for Nanotechnology,3 Northwestern University, Evanston IL 60208.
4
Materials and Manufacturing Directorate and 711 Human Performance Wing, Air Force
Research Laboratory, Wright-Patterson Air Force Base, Dayton, OH, 45433.
5
Department of Mechanical Engineering and Materials Science, Institute of Materials Science
and Engineering, Washington University in St. Louis, St Louis, MO, 63130.
Correspondence: rajesh.naik@us.af.mil (R.N.), g-schatz@northwestern.edu (G.C.S.), and
chadnano@northwestern.edu (C.A.M.)
Normalized Extinction
1.0
0.8
0.6
Particle Diameter
5
10
20
40
60
80
100
0.4
0.2
0
400
500
600
700
Wavelength (nm)
800
Figure S1. Normalized extinction of free Au colloidal solutions.
1
a
bare
b
20 nm
c
40 nm d
60 nm
e
80 nm f
100 nm
Figure S2. SEM micrographs of plasmonic paper with different size adsorbed Au nanospheres.
a. Bare paper and paper with b. 20 c. 40 d. 60 e. 80 f. 100 nm adsorbed Au nanospheres.
2
a
1 nm Gap
2 nm Gap
3 nm Gap
4 nm Gap
5 nm Gap
4
monomer
Average |E| per Particle
105
dimer
triangle
104
10
3
10
2
101
400
trimer
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800 400
500
600
700
Wavelength (nm)
800
b
108
4
tetrahedron
Maximum |E| per Particle
1010
square
106
104
tetramer
102
400
Figure S3. Gap dependence of per particle plasmonic enhancement in different cluster
geometries. a. Average and b. maximum |E|4 on a per particle basis for 20 nm Au nanospheres
with 1, 2, 3, 4, and 5 nm gaps (increasing from left to right).
3
a 1012
b 1012
20 nm
Maximum |E| per Particle
Maximum |E|4 per Particle
10 nm
1010
1010
108
4
108
106
104
102
400
c 1012
500
600
700
Wavelength (nm)
106
104
102
400
800
d 1012
108
4
106
104
500
600
700
Wavelength (nm)
1012
Maximum |E|4 per Particle
60 nm
Maximum |E| per Particle
108
102
400
e
800
1010
80 nm
1010
f
106
104
102
400
800
500
600
700
Wavelength (nm)
800
1012
Maximum |E| per Particle
Maximum |E|4 per Particle
40 nm
1010
500
600
700
Wavelength (nm)
100 nm
1010
108
4
108
106
10
4
102
400
500
600
700
Wavelength (nm)
800
106
10
4
102
400
500
600
700
Wavelength (nm)
800
Figure S4. Size dependence of per particle plasmonic enhancement in different cluster
geometries. Maximum |E|4 on a per particle basis for a. 10, b. 20, c. 40, d. 60, e. 80, and f. 100
nm particles separated by 1 nm.
4
a
105
b 105
10
20 nm
Average |E|4 per Particle
Average |E|4 per Particle
10 nm
4
103
102
101
400
c
10
10
4
103
102
101
500
600
700
Wavelength (nm)
5
800
400
d 105
103
102
101
400
e
104
103
102
101
500
600
700
Wavelength (nm)
105
800
f
400
103
102
800
100 nm
Average |E|4 per Particle
Average |E|4 per Particle
104
500
600
700
Wavelength (nm)
105
80 nm
101
400
800
60 nm
Average |E|4 per Particle
Average |E|4 per Particle
40 nm
104
500
600
700
Wavelength (nm)
104
103
102
101
500
600
700
Wavelength (nm)
800
400
500
600
700
Wavelength (nm)
800
Figure S5. Size dependence of per particle plasmonic enhancement in different cluster
geometries. Average |E|4 on a per particle basis for a. 10, b. 20, c. 40, d. 60, e. 80, and f. 100 nm
particles separated by 1 nm.
5
Auteur
Документ
Catégorie
Без категории
Affichages
7
Taille du fichier
2 676 Кб
Étiquettes
1/--Pages
signaler