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3Optical properties of silicon nanowires for sensor applications
K.A. Gonchar1
1- Lomonosov Moscow State University, Physics Department, Leninskie Gory 1, 119991 Moscow, Russia
Silicon nanowires (SiNWs) fabricated by metal-assisted chemical etching exhibit properties such as photoluminescence in the visible and infrared spectral ranges, low reflectance in the visible spectral range, and enhanced Raman scattering compared to the original crystalline silicon substrate [1]. These properties can be used to create various optical sensors based on them. Also when SiNWs are coated with noble metal nanoparticles, these structures can be used as a signal-amplifying substrate in giant Raman scattering.
It has been shown that porous SiNWs can be used as a sensitive element of an optical oxygen sensor [2]. The nonspecific binding of viruses to the surface of nanostructures made from SiNW arrays was demonstrated for the first time, and the possibility of using this effect to produce a nonspecific optical [3] and impedance sensor [4] for diagnosing viruses was shown. Using the surface-enhanced Raman spectroscopy bilirubin was successfully detected on SiNWs decorated with gold nanoparticles [5], internalin B, a protein associated with the pathogenic bacteria Listeria monocytogenes, was successfully detected on SiNWs decorated with silver nanoparticles [6] and Listeria innocua was successfully detected on SiNWs decorated with silver and gold nanoparticles [7]. The study was supported by the Russian Science Foundation, grant No. 22-72-10062 https://rscf.ru/en/project/22-72-10062/.
[1] L.A. Osminkina, K.A. Gonchar, V.S. Marshov, K.V. Bunkov, D.V. Petrov, L.A. Golovan, F. Talkenberg, V.A. Sivakov, V.Yu. Timoshenko, Optical properties of silicon nanowire arrays formed by metal-assisted chemical etching: evidences for light localization effect, Nanoscale Research Letters, 7, 524 (2012).
[2] V.A. Georgobiani, K.A. Gonchar, E.A. Zvereva, L.A. Osminkina, Porous silicon nanowire arrays for reversible optical gas sensing, Phys. Stat. Sol. A, 215(1), 1700565 (2018).
[3] K.A. Gonchar, S.N. Agafilushkina, D.V. Moiseev, I.V. Bozhev, A.A. Manykin, E.A. Kropotkina, A.S. Gambaryan, L.A. Osminkina, H1N1 influenza virus interaction with a porous layer of silicon nanowires, Mater. Res. Express, 7, p. 035002 (2020).
[4] M.B. Gongalsky, U.A. Tsurikova, J.V. Samsonova, G.Z. Gvindzhiliiia, K.A. Gonchar, N.Yu. Saushkin, A.A. Kudryavtseva, E.A. Kropotkina, A.S. Gambaryan, L.A. Osminkina, Double etched porous silicon nanowire arrays for impedance sensing of influenza viruses, Results in Materials, 6, p. 100084 (2020).
[5] A.D. Kartashova, K.A. Gonchar, D.A. Chermoshentsev, E.A. Alekseeva, M.B. Gongalsky, I.V. Bozhev, A.A. Eliseev, S.A. Dyakov, J.V. Samsonova, L.A. Osminkina, Surface-enhanced Raman scattering-active gold-decorated silicon nanowire substrates for label-free detection of bilirubin, ACS Biomater. Sci. Eng., 8(10), 4175-4184 (2022).
[6] K.A. Gonchar, E.A. Alekseeva, O.D. Gyuppenen, I.V. Bozhev, E.V. Kalinin, S.A. Ermolaeva, L.A. Osminkina, Optical express monitoring of Internalin B, a protein of the pathogenic bacterium Listeria monocytogenes, using SERS-active silver-decorated silicon nanowires, Optics and Spectroscopy, 130(11), 1482-1486 (2022).
[7] D.A. Nazarovskaia, P. A. Domnin, O.D. Gyuppenen, I.I. Tsynyaykin, S.A. Ermolaeva, K.A. Gonchar, L.A. Osminkina, Advanced bacterial detection with SERS-active gold- and silver-coated porous silicon nanowires, Bulletin of the Russian Academy of Sciences: Physics, 87(Suppl.1), S41-S46 (2023).
