One-Pot Radiolytic Synthesis of Gold Nanorods
and their Optical Properties
W. Abidi, PR. Selvakannan,Y. Guillet, I. Lampre, P. Beaunier, B. Pansu, B. Palpant,* H.
Remita*
Supplementary Materials
1.5
Absorbance
1.0
AgNO3
0.5
Ag2SO4
0.0
400
500
600
700
800
900
1000
Wavelength (nm)
Fig. S1: UV-visible
absorption spectra of irradiated solutions containing AuIII and (3 × 10-5
+
M) of Ag from two different precursors AgNO3 and Ag2SO4. Dose = 32.2 kGy. Optical
path length = 2 mm.
1
Fig. S2: HRTEM images of a gold nanorod synthesized by radiolysis (dose = 32.2 kGy)
presenting (100) side faces and (100) and (111) end faces confirmed respectively by the
measured distances.
1.5
under N
2
Absorbance
1.0
0.5
under N O
2
0.0
200
400
600
800
1000
Wavelength (nm)
Fig. S3: UV-Visible absorption spectra of solutions containing AuIII, CTAB, (1.8 × 10-4mol L-1)
of Ag+ and 1 M propan-2-ol under N2 or N2O after irradiation (dose = 32.2 kGy). Optical path
length = 2 mm.
2
III
-4
Fig. S4: UV-Visible absorption spectra of a solution containing Au , CTAB, Ag+ (1.8 × 10
M ), propan-2-ol (1 M) , acetone (0.266 M) as a function of the received dose. Optical path
length = 2 mm. The mean Aspect Ratio of the obtained nanorods is around 1.9. Inset:
Absorbance at λmax ~ 400 nm versus the absorbed dose.
3
1,0
a
Absorbance
b
0,5
0,0
200
400
600
800
Wavelength (nm)
Fig. S5: (a) TEM image of silver nanoparticles obtained by irradiation of solutions containing
AgNO3 (1.8 × 10-4 M), CTAB, TOAB, acetone and cyclohexane (without AuIII) in the same
concentrations than in the solutions leading to nanorods (NR5) synthesis and (b) the
corresponding UV-visible spectrum (optical path length = 2 mm).
(a)
(b)
Fig. S6: Images of PVA hydrogels containing gold nanorods (NR1). For sample (a), the second
irradiation was done after the total reduction of gold complexes while for sample (b) the second
irradiation was done before the total reduction of gold complexes. The final colour of the
sample (a) is blue (the same color as the initial solution containing the nanorods (NR1)) while
the sample (b) is red violet indicating that the aspect ratio has decreased after the second
irradiation.
4