Electronic Supplementary Information (ESI)
Localized surface plasmon resonance of silver nanotriangles synthesized by a versatile solution
reaction
Chunfang Wu*a, Xue Zhoua, Jie Weib
a. Institute of Functional and Environmental Materials, School of Physical Science and Technology,
Lanzhou University, Lanzhou, Gansu 730000, China. E-mail: wuchf@lzu.edu.cn
b. Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi’an
(d)
(g)
32
40
Number of triangles
Percentage of nanoparticles(%)
Jiaotong University, Xi’an, Shanxi 710049, China. E-mail: weij2008@mail.xjtu.edu.cn
20
28
24
20
16
12
0
T-N
Q-N
T-T
8
4
0
100
R-N
200
300
400
Edge length (nm)
(e)
16
40
Number of triangles
Percentage of nanoparticles (%)
A
20
0
(h)
12
8
4
0
T-N
Q-N
T-T
70
R-N
140
210
Edge length (nm)
40
12
(f)
Number of triangles
Percentage of nanoparticles (%)
A
30
20
10
0
8
4
0
T-N
Q-N
T-T
R-N
(i)
40
60
Edge length (nm)
A
Figure S1. TEM images (a, b, c), the different nanoparticles shapes distributions histogram (d, e, f)
and the corresponding edge length distributions histogram (g, h, i) of as-prepared silver nanotriangles
with different dosage of seeds solution. (a), (d) and (g) for 0.01 ml. (b), (e) and (h) for 0.1 ml. (c), (f)
and (i) for 1 ml. In (d), (e) and (f) the T-N, Q-N, T-T and R-N are the abbreviations for triangular
30
(d)
(g)
20
Number of triangles
Percentage of nanoparticles (%)
nanoparticles, quasi-spherical nanoparticles, truncated triangles and rounded nanoplates.
20
10
16
12
8
4
0
0
T-N
Q-N
T-T
200
R-N
400
Edge length (nm)
(e)
16
Number of triangles
Percentage of nanoparticles (%)
A
40
20
(h)
12
0
8
4
0
T-N
Q-N
T-T
70
R-N
140
210
Edge length (nm)
A
8
40
Number of triangles
Percentage of nanoprticles (%)
(i)
(f)
20
4
0
0
T-N
Q-N
T-T
R-N
60
90
120
Edge length (nm)
A
Figure S2. TEM images (a, b, c), the different nanoparticles shapes distributions histogram (d, e, f)
and the corresponding edge length distributions histogram (g, h, i) of as-prepared silver nanotriangles
with different molar ratio of PVP to AgNO3. (a), (d) and (g) for 1. (b), (e) and (h) for 2. (c), (f)
and
(i) for 4. In (d), (e) and (f) the T-N, Q-N, T-T and R-N are the abbreviations for triangular
nanoparticles, quasi-spherical nanoparticles, truncated triangles and rounded nanoplates.
1.2
1.1
Absorbance (a.u.)
1.0
0.01ml
0.1ml
1ml
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
320 340 360 380 400 420 440 460 480 500
Wavelength (nm)
Figure S3. Absorption spectra of products obtained with the seeds solution dosage as 0.01 ml, 0.1 ml
and 1 ml
Absorbance (a.u.)
1.0
(PVP1)
(PVP2)
(PVP4)
0.8
0.6
0.4
0.2
0.0
320 340 360 380 400 420 440 460 480 500
Wavelength (nm)
Figure S4. Absorption spectra of products obtained when the molar ratio between PVP and AgNO3 as
1, 2 and 4