A molecular-imprint nanosensor for ultrasensitive detection of
Electric Supplementary Information of ultrasensitive fluorescence turn-on bio-enzyme ... ·...
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Electric Supplementary Information
Investigation of surface confinement effect of copper nanoclusters: construction
of ultrasensitive fluorescence turn-on bio-enzyme sensing platform
Jinlan Yang a, Naizhong Song a, Qiong Jia a, b*
a College of Chemistry, Jilin University, Changchun 130012, China
b Key Laboratory for Molecular Enzymology and Engineering of Ministry of
Education, School of Life Sciences, Jilin University, Changchun 130012, China
* Corresponding author.
E-mail address: [email protected] (Q. Jia).
CONTENTS
Figs. S1-S10 ················································································· SI-2
Tables S1-S2 ········································································· SI-12
References ················································································· SI-14
Electronic Supplementary Material (ESI) for Nanoscale.This journal is © The Royal Society of Chemistry 2019
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Fig. S1 Size distribution of GS-CuNCs.
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Fig. S2 XPS spectrum of LDH.
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Fig. S3 Auger Cu LMM spectra of GS-CuNCs.
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Fig. S4 UPS spectra of (A), (B) GS-CuNCs and (C), (D) LDH.
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Fig. S5 Band gap energies of (A) GS-CuNCs and (B) LDH.
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Fig. S6 Digital photos of GS-CuNCs stored for 0 day and 1 day at room temperature.
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Fig. S7 The 20-day fluorescence intensity of GS-CuNCs/LDH (I0 was the initial
fluorescence and I was the fluorescence intensities during different days).
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Fig. S8 DLS results of GS-CuNCs/LDH (A) before and (B) after HA capping.
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Fig. S9 SEM images of GS-CuNCs/LDH (A) before and (B) after HA capping.
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Fig. S10 Fluorescence emission spectra of GS-CuNCs/LDH sensing system in the
presence of HA with different concentrations.
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Table S1. Comparison of different detection methods for HAase.
Detection Method Linear range
(U mL–1)
LOD
(U mL–1)
Ref.
Colorimetry/ AuNPs
Colorimetry / AuNPs
Fluorescence /Carbon dots
2.4-3.6
1.25–50
0.2–104
2.4
0.63
0.1
1
2
3
Fluorescence / Carbon dots
Fluorescence / Carbon dots
Fluorescence / Cationic conjugated polymer
Fluorescence / MoS2 quantum dots
Fluorescence / Au/AgNCs
Fluorescence / Pyrene analog
0–400
0.1–8
0–1.85
1–50
0.5–27.5
–
0.65
0.05
0.075
0.7
0.3
0.007
4
5
6
7
8
9
Fluorescence / GS-CuNCs/LDH 0–0.4 0.014 This work
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Table S2. Results of the determination of HAase in urine.
Sample Found
(U·mL−1)
Added
(U·mL−1)
Detected
(U·mL−1)
Recovery
(%)
RSD (n=3,
%)
Urine 1
Urine 2
Urine 3
Urine 4
7.82
11.63
9.48
5.94
5.0
10.0
5.0
10.0
5.0
10.0
5.0
10.0
13.09
16.87
16.45
22.06
14.64
20.13
11.36
16.82
105.4
90.5
96.4
104.3
103.2
106.5
108.4
108.8
3.3
1.9
4.4
3.7
3.8
3.7
1.6
2.1
* The urine samples were diluted with different multiples to ensure that the
concentration of HAase was in the linear range.
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