Supporting Information
One-step preparation of silver hexagonal micro-sheets as electrically
conductive adhesive fillers for printed electronics
Hu-Ming Ren, †, ‡ Ying Guo, †, ‡ Sheng-Yun Huang, †, ‡ Kai Zhang &, Matthew M.F. Yuen &,
Xian-Zhu Fu,*, †, ‡ Shuhui Yu, *, †, ‡ Rong Sun, *, †, ‡ and Ching-Ping Wong ║,§
†
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen
518055, China
‡
Shenzhen High Density Electronic Packaging and Device Assembly Key Laboratory,
Shenzhen 518055, China
&
Department of Mechanical and Aerospace Engineering, Hong Kong University of
Science and Technology, Hong Kong, China
║
Department of Electronics Engineering, The Chinese University of Hong Kong, Hong
Kong, China
§
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta,
Georgia 30332, United States
*Corresponding author
E-mail: [email protected]; [email protected]; [email protected].
S-1
Figure S1 SAED image of the as-prepared silver micro-sheets.
Figure S2 EDS pattern of the as-prepared silver micro-sheets.
S-2
Figure S3. SEM image of the traditional commercial silver flakes.
Figure S4. FT-IR curves of the traditional commercial ball-milled silver flakes,
as-prepared Ag micro-sheets, and regents.
S-3
Figure S5 XRD patterns of samples collected in the synthesis process of silver
micro-sheets: (a) after addition of sodium citrate, (b) after addition of NaBH4, (c) 0.5h
after addition of H2O2, (d-f) 3, 10, 30 minutes after addition of N2H4.
S-4
100
C
O
Ag
Atomic%
80
60
40
20
0
a
b
c
d
e
f
Figure S6 Elopements contents from EDS patterns of samples collected in the synthesis
process of silver micro-sheets: (a) after addition of sodium citrate, (b) after addition of
NaBH4, (c) 0.5h after addition of H2O2, (d-f) 3, 10, 30 minutes after addition of N2H4.
S-5
(a)
(b)
(c)
(d)
(e)
(f)
4000
3500
3000
2500
2000
1500
1000
500
-1
Wavenumber(cm )
Figure S7 FT-IR curves of samples collected in the synthesis process of silver
micro-sheets: (a) after addition of sodium citrate, (b) after addition of NaBH4, (c) 0.5h
after addition of H2O2, (d-f) 3, 10, 30 minutes after addition of N2H4.
S-6
Absorbtion
1.0
(a)
(b)
0.5
(c)
(d,e,f)
0.0
300
400
500
600
700
800
900
Wavenumber(nm)
Figure S8 UV-vis curves of samples collected in the synthesis process of silver
micro-sheets: (a) after addition of sodium citrate, (b) after addition of NaBH4, (c) 0.5h
after addition of H2O2, (d-f) 3, 10, 30 minutes after addition of N2H4.
S-7
Figure S9 XRD patterns of the samples prepared (a) without addition of PVP, (b) with
addition of 5 mmol PVP, (c) without addition of sodium citrate, (d) with addition of 2
mmol sodium citrate.
S-8
Figure S10 XRD patterns of the samples prepared (a) without addition of NaBH4, (b)
with addition of 5 mmol NaBH4, (c) without addition of H2O2, (d) with addition of 200
mmol H2O2, (e) without addition of N2H4, (f) with addition of 200 mmol N2H4.
S-9