XRD

Electronic Supplementary Material (ESI) for Analyst This journal is © The Royal Society of Chemistry 2011

Supplementary material 1 Powder X-ray diffraction (XRD) patterns of O#SQDs produced after thermal annealing. Those marked with “ ” can be indexed to hexagonal wurtzite ZnO (JCPDS file no.36-1451), while the others marked with “ ”can be indexed to hexagonal wurtzite-8H ZnS (JCPDS Card No. 39-1363).

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Electronic Supplementary Material (ESI) for Analyst This journal is © The Royal Society of Chemistry 2011

Supplementary material 2 The TEM pictures of O#SQDs synthesized at 200 C for 18 h. The black circle QDs is the ZnS/ZnO which is amplified.

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Electronic Supplementary Material (ESI) for Analyst This journal is © The Royal Society of Chemistry 2011

1.0 0.9

F/F 0

0.8 0.7 0.6 0.5 0.4 0.00000

0.00001

0.00002

0.00003

0.00004

[ZnO#ZnS]

Supplementary material 3 The quenching ratio (F/F 0 ) of BSA fluorescence with addition of O#SQDs.

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Electronic Supplementary Material (ESI) for Analyst This journal is © The Royal Society of Chemistry 2011

2.4 2.2

F 0/F

2.0 1.8 1.6 1.4 1.2 1.0 0.00000

0.00001

0.00002

0.00003

0.00004

[ZnO#ZnS] mol/L

Supplementary material 4 The Stern-Volmer plots for BSA fluorescence quenching by O#SQDs.

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Electronic Supplementary Material (ESI) for Analyst This journal is © The Royal Society of Chemistry 2011

a

600

a-BSA b-BSA+ZnO#ZnS (15 µM) c-j-BSA+ZnO#ZnS ( 15 µM) +baicalin

400

baicalin b c

300

j ( 8 µM)

c ( 1 µM)

400

naringin b

300 200

200 j

320

340

j

360

380

400

0 300

420

320

a

a-BSA b-BSA+ZnO#ZnS ( 15 µM) c-j-BSA+ZnO#ZnS (15 µM)+genistin

400 b

j (8 µM)

200

0 300

j

320

340

380

400

j (8 µM) j

200

320

340

380

400

420

300

a-BSA b-BSA+ZnO#ZnS (15 µM) c-j-BSA+ZnO#ZnS ( 15 µM) +kaempferitrin

500

rutin

b

a

600

Intensity (a.u.)

Intensity (a.u.)

400

j ( 8 µM)

j

c ( 1 µM)

400

kaempferitrin b

j ( 8 µM)

300 200 j

100 0 300

360

Wavelength(nm)

c ( 1 µM)

200

narirutin

b 300

0 300

420

a-BSA b-BSA+ZnO#ZnS (15 µM) c-j-BSA+ZnO#ZnS ( 15 µM) +rutin

500

420

100

360

a

400

a-BSA b-BSA+ZnO#ZnS (15 µM) c-j-BSA+ZnO#ZnS (15 µM) +narirutin

400

Wavelength (nm)

600

380

c (1 µM)

genistin

100

a

500

c (1 µM)

300

360

600

Intensity (a.u.)

Intensity (a.u.)

500

340

Wavelength (nm)

Wavelength (nm)

600

j ( 8 µM)

100

100 0 300

a-BSA b-BSA+ZnO#ZnS ( 15 µM) c-j-BSA+ZnO#ZnS ( 15 µM) +naringin

500

c ( 1 µM)

Intensity (a.u.)

Intensity (a.u.)

500

a

600

100

320

340

360

380

400

0 300

420

Wavelength(nm)

320

340

360

380

400

420

Wavelength (nm)

Supplementary material 5 The fluorescence quenching of BSA by flavonoid glycosides in combination of quantitative O#SQDs (15.00×10-6 mol/L). BSA, 1.00×10-5 mol/L, λ ex = 280 nm, T = 300 K.

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