Nanoscale Advances
[Pages:13]Electronic Supplementary Material (ESI) for Nanoscale Advances. This journal is ? The Royal Society of ChePmleiassterydo20n1ot9adjust margins
Nanoscale Advances
Supplementary Information
Hydrochromic carbon dots as smart sensors for water sensing in organic solvents
Anitha Senthamizhan*a, Despina Fragouli*a, Brabu Balusamyb, Bhushan Patilc, Milan Paleie, Stefania Sabellab, Tamer Uyarc,d and Athanassia Athanassiou*a
a.Smart Materials, Istituto Italiano di Tecnologia, 16163 Genova, Italy. anitha.senthamizhan@iit.it, dranitha35@, despina.fragouli@iit.it, athanassia.athanassiou@iit.it
b.Nanoregulatory Platform, PharmaChemistry, Department of Drug Discovery and Development, Istituto Italiano di Tecnologia, 16163 Genova, Italy c. Institute of Materials Science & Nanotechnology, Bilkent University, Ankara, 06800, Turkey d.Department of Fiber Science and Apparel Design, College of Human Ecology, Cornell University, Ithaca, NY, 14853, USA e. Nanochemistry Department, Istituto Italiano di Tecnologia, 16163 Genova, Italy
This journal is ? The Royal Society of Chemistry 20xx
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Table of contents
Journal Name
Figure No
Description
S1
Fourier-transform infrared spectra of the carbon dots
Page No
3
S2
XPS survey spectra of carbon dots
4
S3
XRD spectra of carbon dots
5
S4
Representative 2D excitation-emission contour map of carbon dots
6
S5
Biocompatibility studies of carbon dots
7
S6
Visual colorimetric changes in the emission of CD1 in THF upon addition of water 8
S7
Visual colorimetric changes in the emission of CD1 in THF upon addition of pure THF 8
S8
Selective water sensing performance of CD1/THF
9
S9
Time-resolved photoluminescence decay curves
9
S10
Excitation-emission contour maps of carbon dots in IPA and hydrated IPA
10
S11
Colorimetric sensing performance of hydrated Isopropyl alcohol
11
Supplementary Table
Supplementary Table 1: Comparison of the carbon dot based photoluminescent water sensor with other works.
Supplementary Movie
Supplementary Movie 1: Demonstration of water sensing performance. An immediate distinguishable color change of CD1 is noticed upon exposure to water.
Supplementary Movie 2: Demonstration of selective water sensing performance. The IPA, as an example of polar protic solvent is introduced into CD1/THF (2 mL) to evaluate the selective sensing response towards water. There is no significant change in the emission color of the CD1.
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Journal Name
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ARTICLE
Fig. S1 Fourier-transform infrared spectra of the carbon dots.
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Fig. S2 XPS survey spectra of carbon dots (a) and the table (b) containing atomic concentration of present elements (%).
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Journal Name
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CD5
ARTICLE
CD4
Intensity(a.u.)
CD3 CD2
CD1
12 16 20 24 28 32 36 40 2 Theta (degree)
Fig. S3 XRD spectra of carbon dots.
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Fig. S4 Representative 2D excitation-emission contour map of carbon dots (a) CD1 (b) CD2 (c) CD3 (d) CD4 and (e) CD5.
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ARTICLE
(a)
Cell Viability (%)
160 140 120 100
80 60 40 20
0 Control CD1
24h
48h
CD2 CD3 CD4
CD5
Cell Viability (%)
(b) 160
140 120 100
80 60 40 20
0 Control CD1
24h
48h
CD2 CD3 CD4
CD5
(c)
DCF Intensity (%)
220 200
24h
48h
180
160
140
120
100
80
60
40
20
0
Cont5roml M H2O2
CD1
CD2
CD3
CD4
CD5
(d) 220
200
24h
48h
DCF Intensity (%)
180
160
140
120
100
80
60
40
20
0
Cont5roml M H2O2
CD1
CD2
CD3
CD4
CD5
Fig. S5 Biocompatibility studies of carbon dots. Cellular effects of carbon dots in Caco-2 human colon carcinoma cells using WST-1 cell viability and H2DCF-DA assay at 100 g/mL (a&c) and 250 g/mL (b&d). Error bars depict ? standard error of the mean for n=3.
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ARTICLE
Control
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H2O
Journal Name
Fig. S6 Visual colorimetric changes in the emission of CD1 in THF upon addition of water under UV light (max-365 nm).
Fig. S7 Visual colorimetric changes in the emission of CD1 in THF upon addition of pure THF under UV light (max365 nm).
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