Supplementary material (ESI) for Journal of Materials Chemistry
This journal is © The Royal Society of Chemistry 2004
Supporting Information Available: M. Aslam et al.
FTIR Spectroscopy:
Transmission (%)
0.00
(1)
0.02
0.04
(2)
0.06
0.08
3325
0.10
0.12
3500
3000
2500
2000
-1
Wave Number (cm )
Figure S1: FTIR spectra of drop-coated films of pure Olylelamine (curve 1) and
OLA-capped gold nanoparticles on Si(111) wafer at room temperature (curve 2).
TEM Results:
N2-Au
N3-Au
25 nm
25 nm
Supplementary material (ESI) for Journal of Materials Chemistry
This journal is © The Royal Society of Chemistry 2004
N4-Au
25 nm
N2-Au
N4-Au
14 nm
N6-Au
20 nm
N6-Au
200 nm
250 nm
Figure S2: TEM images of the amine concentration-dependent growth of gold
nanoparticles in the aqueous system. (a) N2-Au (b) N3-Au (c) N4-Au and (d) N6-Au;
which corresponds to the 1× 10–1, 5×10–2, 1× 10–2 and 1 × 10–3 M olyelamine respectively.
Supplementary material (ESI) for Journal of Materials Chemistry
This journal is © The Royal Society of Chemistry 2004
Concentration of Amine Molecule
UV-vis spectroscopy dependent Studies:
0.5
0.4
0.3
0.2
0.1
0.0
0
30
60
90
120
150
Particle Size (nm)
580
570
 max
560
550
540
530
520
0.0
0.1
0.2
0.3
0.4
0.5
Concentration of C18Amine (per Lit)
Figure S3. (a) Relationship between the mean diameters of gold nanoparticles and the
initial Amine/Au molar ratios and the respective shift in the maxima of absorbance (b)
Supplementary material (ESI) for Journal of Materials Chemistry
This journal is © The Royal Society of Chemistry 2004
XPS Studies of C18Amine-Au Nanoparticles:
4000
(a) C 1s
3500
Intensity (a.u.)
3000
2500
2000
1500
1000
500
0
-500
276
278
280
282
284
286
288
290
292
294
Binding Energy (eV)
100
(b) Au
4f
80
Intensity (a.u.)
60
40
20
0
-20
80
82
84
86
88
90
Binding Energy (eV)
1000
800
(c) N 1s
Intensity (a.u.)
600
400
200
0
-200
392
394
396
398
400
402
404
406
408
Binding Energy (eV)
Figure S4. (a) C1s spectrum from amine-stabilized nanoparticles referenced at 284.6 eV.
(b) Au 4f core level spectra recorded from these gold nanoparticles film grown on a
Supplementary material (ESI) for Journal of Materials Chemistry
This journal is © The Royal Society of Chemistry 2004
Si(111) substrate by dropcasting. The spin-orbit components are shown in the figure. (c)
N 1s core level spectra recorded from these particles.