Selective synthesis of three-dimensional ZnO@Ag/SiO<sub>2</sub>@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer<xref rid="cpb_28_12_124204fn1" ref-type="fn">*</xref><fn id="cpb_28_12_124204fn1"><label>*</label><p>Project supported by the Fund from the Science and Technology Department of Jilin Province, China (Grant No. 20170520108JH), the Beihua University Youth Nurtural Fund, China (Grant No. 2017QNJJL15), the Beihua University PhD Research Start-up Fund, China (Grant No. 202116140), and the Undergraduate Innovation Project, China (Grant No. 220718100).</p></fn>

Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer**

Project supported by the Fund from the Science and Technology Department of Jilin Province, China (Grant No. 20170520108JH), the Beihua University Youth Nurtural Fund, China (Grant No. 2017QNJJL15), the Beihua University PhD Research Start-up Fund, China (Grant No. 202116140), and the Undergraduate Innovation Project, China (Grant No. 220718100).

Mu Jia-Jia^{1, †}, He Chang-Yi¹, Sun Wei-Jie², Guan Yue¹

(a) and (b) SEM micrographs of the fabricated ZnO nanorods coated with Ag/SiO₂@Ag for (a) outer layer Ag nanoparticles sputtering duration of 67 s and Ag nanoparticle size of about 10 nm, (b) outer layer Ag nanoparticles sputtering duration of 200 s and Ag nanoparticle size of about 30 nm, (c) outer layer Ag nanoparticle sputtering duration of 334 s and Ag nanoparticle size of about 50 nm, and (d) outer layer Ag nanoparticle sputtering duration of 470 s and Ag nanoparticle size of about 70 nm.