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Journal of Experimental Nanoscience Volume 11, 2016 - Issue 8
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Original Articles

Surface enhanced Raman scattering on SiO2/Ag nanoparticles aggregate and preparation of nitrogen-doped carbon dots by pyrolysis of Co(2,2′-bipyridine)2(dicyanamide)2

Shao-Fang HuoDepartment of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, China
,
Zhao-Chun ZhangDepartment of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, ChinaCorrespondence[email protected]
&
Qi-Liang MaDepartment of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, China
Pages 669-680 | Received 28 Jul 2015, Accepted 04 Nov 2015, Published online: 07 Dec 2015

Figures & data

Table 1. Selected crystal data of Co(bpy)2(N(CN)2)2.

Table 2. Selected bond lengths (Å) and angles (deg) of Co(bpy)2(N(CN)2)2.

Figure 1. Molecular structure (A) and 3D supra-molecular network (B) of Co(bpy)2(N(CN)2)2.

Figure 1. Molecular structure (A) and 3D supra-molecular network (B) of Co(bpy)2(N(CN)2)2.

Table 3. Assignment of vibrational modes of Co(bpy)2(N(CN)2)2 and SiO2/Ag-NPs/Co(bpy)2(N(CN)2)2.

Figure 2. XRD pattern of SiO2/Ag-NPs/Co(bpy)2(N(CN)2)2.

Figure 2. XRD pattern of SiO2/Ag-NPs/Co(bpy)2(N(CN)2)2.

Figure 3. SEM image of SiO2/Ag-NPs.

Figure 3. SEM image of SiO2/Ag-NPs.

Figure 4. UV–vis spectrum and fluorescence spectrum of Co(bpy)2(N(CN)2)2.

Figure 4. UV–vis spectrum and fluorescence spectrum of Co(bpy)2(N(CN)2)2.

Figure 5. Raman spectra of Co(bpy)2(N(CN)2)2 and SiO2/Ag-NPs/Co(bpy)2(N(CN)2)2.

Figure 5. Raman spectra of Co(bpy)2(N(CN)2)2 and SiO2/Ag-NPs/Co(bpy)2(N(CN)2)2.

Figure 6. Geometry of Co(bpy)2(N(CN)2)2 molecule absorbed on Ag-NPs surface with sloping adsorption configuration.

Figure 6. Geometry of Co(bpy)2(N(CN)2)2 molecule absorbed on Ag-NPs surface with sloping adsorption configuration.

Figure 7. XRD patterns of pyrolysis products at different pyrolysis temperature.

Figure 7. XRD patterns of pyrolysis products at different pyrolysis temperature.

Figure 8. Representative TEM image of carbon dots from light brown supernatant.

Figure 8. Representative TEM image of carbon dots from light brown supernatant.

Figure 9. FTIR spectrum of CDs.

Figure 9. FTIR spectrum of CDs.

Figure 10. XPS spectra of nitrogen-doped CDs for C1s and N1s states.

Figure 10. XPS spectra of nitrogen-doped CDs for C1s and N1s states.

Figure 11. PLE and PL spectra of CDs from light brown liquid.

Figure 11. PLE and PL spectra of CDs from light brown liquid.

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