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HomeSolid State PhenomenaSolid State Phenomena Vol. 222Oxide Nanomaterials and their Applications as a...

Oxide Nanomaterials and their Applications as a Memristor

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Abstract:

Nowadays, oxide nanomaterials have received great attention due to their unique semiconducting, optical and electrical properties. Oxide nanomaterials exhibit these properties due to their small size, high surface area to volume ratio and great biocompatibility. The chemical activity of the oxide nanomaterials is highly enhanced by the presence of oxygen vacancies in these materials. This review article outlined the unique properties, synthesis techniques and applications of oxide nanomaterials.The important and unique properties of TiO₂ and ZnO nanomaterials with their possible crystal structures have been discussed. In application part, the oxide nanomaterials especially ZnO has been discussed for memory device applications. To control the performance of oxide nanomaterials for memristor device application, a better understanding of their properties is required.Table of Contents

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Solid State Phenomena (Volume 222)

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67-97

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https://doi.org/10.4028/www.scientific.net/SSP.222.67

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November 2014

Authors:

S.K. Tripathi, Ramneek Kaur, Mamta Rani

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Memory Devices, Memristor, Oxide Nanomaterials, Oxygen Vacancies, Sol-Gel, ZNO

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[1] M. Fernández-García, A. Martínez-Arias, J.C. Hanson, J.A. Rodríguez, Nanostructured oxides in chemistry: Characterization and properties, Chem. Rev. 104 (2004) 4063-4104.

DOI: 10.1021/cr030032f

[2] L. Zhang, J. Liu, H. Xiao, D. Liu, Y. Qin, H. Wu, H. Li, N. Du, W. Hou, Preparation and properties of mixed metal oxides based layered double hydroxide as anode materials for dye-sensitized solar cell, Chem. Eng. J. 250 (2014) 1–5.

DOI: 10.1016/j.cej.2014.03.098

[3] E. Comini, C. Baratto, I. Concina, G. Faglia, M. Falasconi, M. Ferroni, V. Galstyan, E. Gobbi, A. Ponzoni, A. Vomiero, D. Zappa, V. Sberveglieri, G. Sberveglieri, Metal oxide nanoscience and nanotechnology for chemical sensors, Sensor ActuatB. 179 (2013).

DOI: 10.1016/j.snb.2012.10.027

[4] M. Rani, S.K. Tripathi, Fabrication, characterization and photoconducting behaviour of mesoporous ZnO, TiO2 and TiO2/ZnO bilayer system: comparative study, Energy Environ. Focus 2 (2013) 227-234.

DOI: 10.1166/eef.2013.1055

[5] M. Shelef, G.W. Graham, R.W. McCabe, In Catalysis by Ceria and Related Materials, Trovarelli, A. (Editor); Imperial College Press, London, (2002).

[6] S.E. Savelev, A.S. Alexandrov, A.M. Bratkovsky, R.S. Williams, Molecular dynamics simulations of oxide memory resistors (memristors), Nanotechnology. 22 (2011) 254011 (1-7).

DOI: 10.1088/0957-4484/22/25/254011

[7] J.P. Strachan, J.J. Yang, R. Munstermann, A. Scholl, G. Medeiros-Ribeiro, D.R. Stewart, R. S. Williams, Structural and chemical characterization of TiO2 memristive devices by spatially-resolved NEXAFS, Nanotechnology. 20 (2009) 485701(1-6).

DOI: 10.1088/0957-4484/20/48/485701

[8] Duo Li, Maozhi Li, Ferdows Zahid, Jian Wang, Hong Guo, Oxygen vacancy filament formation in TiO2: A kinetic Monte Carlo study, J. Appl. Phys. 112 (2012) 073512(1-7).

DOI: 10.1063/1.4757584

[9] J. Schoiswohl, G. Kresse, S. Surnev, M. Sock, M.G. Ramsey, F.P. Netzer, Planar Vanadium Oxide Clusters: Two-Dimensional Evaporation and Diffusion on Rh(111), Phys. Rev. Lett. 92(2004) 206103(1-4).

DOI: 10.1103/physrevlett.92.206103

[10] S.K. Tripathi, Oxide nanostructure, Edited by A, K, Srivastava, CRC Press: Pan Stanford Publishing, ISBN 978-981-4411-35-6 (2013) 255.

[11] G. Skandan C.M. Foster, H. Frase, M.N. Ali, J.C. Parker, H. Hahn, Phase characterization and stabilization due to grain size effects of nanostructured Y2O3, Nanostruct. Mater. 1 (1992) 313-322.

DOI: 10.1016/0965-9773(92)90038-y

[12] R.C. Garvie, M.F. Goss, Intrinsic size dependence of the phase transformation temperature in zirconia microcrystals, J. Mater. Sci. 21(1986) 1253-1257.

DOI: 10.1007/bf00553259

[13] M.D. Hernández-Alonso, A.B. Hungría, J.M. Coronado, A. Martínez-Arias, J.C. Conesa, J. Soria, M.F. García, Confinement effects in quasi-stoichiometric CeO2 nanoparticles, Phys. Chem. Chem. Phys. 6 (2004) 3524-3529.

DOI: 10.1039/b403202k

[14] J. Gangwar, K.K. Dey, S.K. Tripathi, M. Wan, R.R. Yadav, R.K. Singh, Samta, A.K. Srivastava, NiO-based nanostructures with efficient optical and electrochemical properties for high-performance nanofluidsNanotechnology 24 (2013) 415705 (1-15).

DOI: 10.1088/0957-4484/24/41/415705

[15] W. Zhang, Z. Liu, Z. Liu, J. Zhao, Effect of calcination temperature on the structural and optical properties of ZnO: Fe powders, Appl. Surf. Sci. 258(2014) 6103-6106.

DOI: 10.1016/j.apsusc.2012.03.011

[16] P. Moriarty, Nanostructured materials, Rep. Prog. Phys. 64 (2001) 297-381.

[17] U. Woggon, Optical properties of semiconductor quantum dots, Springer, Berlin, 136, (1996).

[18] T. Albaret, F. Finocchi, C. Noguera, First principles simulations of titanium oxide clusters and surfaces, Faraday Discuss. 114(1999) 285-304.

DOI: 10.1039/a903066b

[19] J.A. Rodriguez, A. Maiti, Adsorption and decomposition of H2S on MgO(100), NiMgO(100), and ZnO(0001) surfaces: A first-principles density functional study,J. Phys. Chem. B. 104 (2000) 3630-3638.

DOI: 10.1021/jp000011e

[20] J.A. Rodriguez, Orbital-band interactions and the reactivity of molecules on oxide surfaces: from explanations to predictions, Theor. Chem. Acc. 107(2002) 117-129.

[21] Y. Shen, H. Zhao, J. Xu, X. Zhang, K. Zheng, K. Swierczek, Effect of ionic size of dopants on the lattice structure, electrical and electrochemical properties of La2-xMxNiO4+δ (M = Ba, Sr) cathode materials, Int. J. Hydrogen Energ. 39 (2014).

DOI: 10.1016/j.ijhydene.2013.10.153

[22] H. Luth, Surface and Interface of Solid Materials, Springer, Berlin, (1997).

[23] E. Lucas, S. Decker, A. Khaleel, A. Seitz, S. Futlz, A. Ponce, W. Li, C. Carnes, K.J. Klabunde, Nanocrystalline metal oxides as unique chemical reagents/sorbents, Chem. Eur. J. 7 (2001) 2505-2510.

DOI: 10.1002/1521-3765(20010618)7:12<2505::aid-chem25050>3.0.co;2-r

[24] J.A. Rodriguez, J. Hrbek, J. Dvorak, T. Jirsak, A. Maiti, Interaction of sulfur with TiO2(110): Photoemission and density-functional studies, Chem. Phys. Lett., 336(2001) 377-384.

DOI: 10.1016/s0009-2614(01)00182-8

[25] B.J. Scott, G. Wirnsberger, G.D. Stocky, Mesoporous and mesostructured materials for optical applications, Chem. Mater. 13 (2001) 3140-3150.

DOI: 10.1021/cm0110730

[26] A.D. Yoffre, Semiconductor quantum dots and related systems: electronic, optical, luminescence and related properties of low dimensional systems, Adv. Phys. 50 (2001) 1-208.

DOI: 10.1080/00018730010006608

[27] Y.D. Glinka, S.H. Lin, L.P. Hwang, Y.T. Chen, N.H. Tolk, Size effect in self-trapped exciton photoluminescence from SiO2-based nanoscale materials, Phys. Rev. B 64 (2001) 085421 (1-11).

DOI: 10.1103/physrevb.64.085421

[28] L.K. Pan, C.Q. Sun, Coordination imperfection enhanced electron-phonon interaction, J. Appl. Phys. 95 (2004) 3819-3821.

DOI: 10.1063/1.1646469

[29] R.S. Knoxy, Theory of exciton; Solid state physics, Supplement 5, Academic Press, New York, (1963).

[30] U. Woggon, Optical properties of semiconductor quantum dots, Vol. 136, Springer, (1996).

[31] A.L. Efros, M. Rosen, The electronic structure of semiconductor nanocrystals, Annu. Rev. Mater. Sci. 30 (2000) 475-521.

DOI: 10.1146/annurev.matsci.30.1.475

[32] M. Iwamoto, T. Abe, Y. Tachibana, Control of bandgap of iron oxide through its encapsulation into SiO2 based mesoporous materials, J. Mol. Catal. A. 55 (2000) 143-153.

DOI: 10.1016/s1381-1169(99)00330-1

[33] O. Vigil, F. Cruz, A. Morales-Acabedo, G. Contreras-Puente, L. Vaillant, G. Santana, Structural and optical properties of annealed CdO thin films prepared by spray pyrolysis, Mat. Chem. Phys. 68 (2001) 249-252.

DOI: 10.1016/s0254-0584(00)00358-8

[34] K. Borgohain, N. Morase, S. Mahumani, Synthesis and properties of Cu2O quantum particles, J. Appl. Phys. 92 (2002) 1292-1297.

[35] T. Suzuki, I. Kosacki, V. Petrovsky, H.U. Anderson, Optical properties of undoped and Gd-doped CeO2 nanocrystalline thin films, J. Appl. Phys. 91 (2001) 2308-2314.

DOI: 10.1063/1.1430890

[36] S. Monticone, R. Tufeu, A.V. Kanaev, E. Scolan, C. Sánchez, Quantum size effect in TiO2 nanoparticles: does it exist?, Appl. Surf. Sci. 162-163 (2000) 565-570.

DOI: 10.1016/s0169-4332(00)00251-8

[37] L. Li, X. Qui, G. Li, Correlation between size-induced lattice variations and yellow emission shift in ZnO nanostructures, Appl. Phys. Lett. 87 (2005) 124101 (1-3).

DOI: 10.1063/1.2051800

[38] M.F. Garcia, X. Wang, C. Belver, Hanson, A. Iglesias-Juez, J.A. Rodriguez, Ca Doping of Nanosize Ce-Zr and Ce-Tb Solid Solutions: Structural and Electronic Effects, Chem. Mater. 17 (2005) 4181-4193.

DOI: 10.1021/cm050265i

[39] H.C. Ong, A.X.E. Zhu, G.T. Du, Dependence of the excitonic transition energies and mosaicity on residual strain in ZnO thin ﬁlms, Appl. Phys. Lett. 80 (2002) 941-943.

DOI: 10.1063/1.1448660

[40] G.L. Miessler, D.A. Tarr, Inorganic Chemistry, 2nd Ed., Prentice-Hall Inc, New Jersey, (1999).

[41] D.F. Shriver, P.W. Atkins, Inorganic Chemistry, 3rd Ed., Oxford University Press, Oxford, (1999).

[42] X. Chen, S.S. Mao, Titanium dioxide nanomaterials: synthesis, properties, modifications and applications, Chem. Rev. 107 (2007) 2891-2959.

DOI: 10.1021/cr0500535

[43] R. Asahi, Y. Taga, W. Mannstadt, A.J. Freeman, Electronic and optical properties of anatase TiO2, J. Phys. Rev. B 61 (2000) 7459-7465.

[44] O. Carp, C.L. Huisman, A. Reller, Photoinduced reactivity of titanium dioxide, Progress in Solid State Chem. 32(2004) 33-177.

DOI: 10.1016/j.progsolidstchem.2004.08.001

[45] J. Ohring, The Material Science of Thin Films, Academic-Press, San Diego, (1992).

[46] G.K. Hubler, X-ray investigation of the solid solution Zn1−XCuXCr2S4 with spinel structure, Mater. Res. Bull. 17 (1992) 25-28.

[47] L. D´Souza, R. Richards, Synthesis of metal-oxide nanoparticles: Liquid-solid transformations in synthesis, properties and applications of oxide nanoparticles, (Rodríguez, J.A., Fernández-García, M; Eds. ). N. J. Whiley, (2007).

DOI: 10.1002/9780470108970.ch3

[48] K.S. Suslick, S.B. Choe, A.A. Cichowlas, M.W. Geenstaff, Sonochemical Synthesis of Amorphous Iron, Nature, 353 (1991) 414-416.

DOI: 10.1038/353414a0

[49] J.F. Chen, Y.H. Wang, F. Gou, X.M. Wang, C. Zheng, Synthesis of nanoparticles with novel technology: High-gravity reactive precipitation, Ind. Eng. Chem. Res. 39 (2002) 948-954.

DOI: 10.1021/ie990549a

[50] V. Uskokovick, M. Drofenik, Synthesis of materials within reverse micelles, Surf. Rev. Letter, 12(2005) 239-277.

DOI: 10.1142/s0218625x05007001

[51] M. Rani, S.K. Tripathi, Effect of Eosin Y dye on electrical properties of ZnO filmsynthesized by sol–gel technique, J. Electron Mater, 43 (2014) 426-434.

DOI: 10.1007/s11664-013-2925-0

[52] M. Rani, Saeed J. Abbas, S.K. Tripathi, Influence of annealing temperature and organic dyes as sensitizers on sol–gel derived TiO2 films, Mater. Sci. Eng. B, 187 (2014) 75–82.

DOI: 10.1016/j.mseb.2014.04.010

[53] C. Bechinger, S. Ferrer, A. Zaban, J. Sprague, B.A. Gregg, Photoelectrochromic windows and displays, Nature, 383(1996) 608-610.

DOI: 10.1038/383608a0

[54] R. Cinnsealach, G. Boschloo, S.N. Rao, D. Fitzmaurice, Coloured electrochromic windows based on nanostructured TiO2 films modified by adsorbed redox chromophores, Sol. Energy Mater. Sol. Cells 57 (1999) 107-125.

DOI: 10.1016/s0927-0248(98)00156-1

[55] E. Topoglidis, E. Palomares, Y. Astuti, A. Green, C.J. Campbell, J.R. Durrant, Immobilization and electrochemistry of negatively charged proteins on modified nanocrystalline metal oxide electrodes, Electroanalysis, 17 (2005)1035-1041.

DOI: 10.1002/elan.200403211

[56] M. Grätzel, Photoelectrochemical cells, Nature, 414 (2001) 338-344.

[57] M. Grätzel, Conversion of sunlight to electric power by nanocrystalline dye-sensitized solar cells, J. Photochem. Photobiol. A: Chem. 164 (2004) 3-14.

DOI: 10.1016/j.jphotochem.2004.08.014

[58] C. Lévy-Clément, R. Tena-Zaera, M. -A. Ryan, A. Katty, G. Hodes, CdSe-sensitized p-CuSCN/nanowire n-ZnO heterojunctions, Adv. Mat. 17 (2005) 1512-1515.

DOI: 10.1002/adma.200401848

[59] R. Könenkamp, R.C. Word, M. Godinez, Ultraviolet electroluminescence from ZnO/polymer heterojunction light-emitting diodes, Nano Lett. 5 (2005) 2005-(2008).

DOI: 10.1021/nl051501r

[60] C. Jorand-Sartoretti, B.D. Alexander, R. Solarska, I.A. Rutkowska, J. Augustynski, R. Cerny, Photoelectrochemical oxidation of water at transparent ferric oxide film electrodes, J. Phys. Chem. B, 109 (2005) 13685-13692.

DOI: 10.1021/jp051546g

[61] A.S. Aricò, P. Bruce, B. Scrosati, J.M. Tarascon, W. Van Schalkwijk, Nanostructured materials for advanced energy conversion and storage devices, Nat. Mat. 4 (2005) 366-377.

DOI: 10.1038/nmat1368

[62] A.L. Linsebigler, G.Q. Lu, J.T. Yates, Photocatalysis on TiOn surfaces: Principles, mechanisms, and selected results, Chem Rev 95 (1995) 735-758.

DOI: 10.1021/cr00035a013

[63] I.M. Butterﬁeld, P.A. Christensen, T.P. Curtis, J. Gunlazuardi, Water disinfection using an immobilised titanium dioxide film in a photochemical reactor with electric field enhancement, Water Res 31 (1997) 675-677.

DOI: 10.1016/s0043-1354(96)00391-0

[64] K.H. Kim, S. Gaba, D. Wheeler, J.M. Cruz-Albrecht, T. Hussain, N. Srinivasa, W. Lu, A functional hybrid memristor crossbar-array/CMOS system for data storage and neuromorphic applications, Nano Lett. 12 (2012) 389−395.

DOI: 10.1021/nl203687n

[65] T.D. Dongale, S.S. Shinde, R.K. Kamat, K.Y. Rajpure, Nanostructured TiO2 thin film memristor using hydrothermal process, J Alloy Compd. 593 (2014) 267–270.

DOI: 10.1016/j.jallcom.2014.01.093

[66] A. Sawa, Resistive switching in transition metal oxides, Mater. Today 11(6) (2008) 28-36.

DOI: 10.1016/s1369-7021(08)70119-6

[67] B.J. Choi, D.S. Jeong, S.K. Kim, C. Rohde, S. Choi, J.H. Oh, H.J. Kim, C.S. Hwang, K. Szot, R. Waser, B. Reichenberg, S. Tiedke: Resistive switching mechanism of TiO2 thin films grown by atomic layer deposition. J. Appl. Phys. 98 (2005).

DOI: 10.1063/1.2001146

[68] M. Fujimoto, H. Koyama, M. Konagai, Y. Hosoi, K. Ishihara, S. Ohnishi, and N. Awaya, TiO2 anatase nanolayer on TiN thin film exhibiting high-speed bipolar resistive switching, Appl. Phys. Lett. 89 (2006) 223509(1-3).

DOI: 10.1063/1.2397006

[69] K. Tsunoda, Y. Fukuzumi, J.R. Jameson, Z. Wang, P.B. Griffin, Y. Nishi, Bipolar resistive switching in polycrystalline TiO2 films, Appl. Phys. Lett. 90 (2007) 113501(1-3).

DOI: 10.1063/1.2712777

[70] M.J. Lee, S. Seo, D.C. Kim, S.E. Ahn, D.H. Seo, I.K. Yoo, I.G. Baek, D.S. Kim, I.S. Byun, S.H. Kim, I.R. Hwang, J.S. Kim, S.H. Jeon, B.H. Park, A low-temperature-grown oxide diode as a new switch element for high-density, nonvolatile memories, Adv. Mater. 19(2007).

DOI: 10.1002/adma.200601025

[71] J.J. Yang, J.P. Strachan, F. Miao, M-X. Zhang, M.D. Pickett, W. Yi, D.A.A. Ohlberg, G. Medeiros-Ribeiro, R.S. Williams, Metal/TiO2 interfaces for memristive switches, Appl. Phys. A 102, (2011) 785-789.

DOI: 10.1007/s00339-011-6265-8

[72] L.O. Chua, Memristor – the Missing Circuit Element, IEEE T. Circuit Theory 18, (1971) 507-519.

DOI: 10.1109/tct.1971.1083337

[73] L.O. Chua and S. M. Kang, Memristive Devices and Systems, P. IEEE 64, (1976) 209-223.

[74] D.B. Strukov, G.S. Snider, D.R. Stuwart, R.S. Williams, The Missing Memristor Found, Nature 453 (2008) 80-83.

DOI: 10.1038/nature06932

[75] Z.J. Chew, L. Li, A discrete memristor made of ZnO nanowires synthesized on printed circuit board, Materials Letters 91 (2013) 298-300.

DOI: 10.1016/j.matlet.2012.10.011

[76] F.M. Bayat, S.B. Shouraki, Memristor-based circuits for performing basic arithmetic operations, Procedia Computer Science 3 (2011) 128–132.

DOI: 10.1016/j.procs.2010.12.022

[77] Alexander A. Zakhidov, Byungki Jung, Jason D. Slinker, Héctor D. Abruña, George G. Malliaras. A light-emitting memristor. Organic Electronics 11 (2010) 150–153.

DOI: 10.1016/j.orgel.2009.09.015

[78] Y.V. Pershin, M.D. Ventra, Solving mazes with memrsitors: a massively parallel approach, Physical Review E 84 (2011) 046703(1-6).

DOI: 10.1103/physreve.84.046703

[79] G.E. Pazienza, R. Kozma, Memristor as an archetype of dynamic data-driven systems and applications to sensor networks, Procedia Computer Science 4 (2011) 1782–1787.

DOI: 10.1016/j.procs.2011.04.193

[80] E. Gale, B.L. Costello, A. Adamatzky, Memristor-based information gathering approaches, both ant-inspired and hypothetical, Nano Communication Networks 3 (2012) 203–216.

DOI: 10.1016/j.nancom.2012.09.005

[81] F.M. Bayat, S.B. Shouraki, Programming of memristor crossbars by using genetic algorithm, Procedia Computer Science. 3 (2011) 232–237.

DOI: 10.1016/j.procs.2010.12.039

[82] R. Waser, M. Aono, Nanoionics-based resitive switching memories, Nature Materials 6 (2007) 833–840.

DOI: 10.1038/nmat2023

[83] P. Kuekes, Material Implication: digital logic with memristors, Memristor and Memristive Systems Symposium, 21 November (2008).

[84] S. Shin, K. Kim, S.M. Kang, Memristor-based fine resolution resistance and its applications, ICCCAS 2009, July (2009).

[85] X.Y. Wang, A.L. Fitch, H.H.C. Iu, W.G. Qi, Design of a memcapacitor emulator based on a memristor, Physics Letters A 376 (2012) 394–399.

DOI: 10.1016/j.physleta.2011.11.012

[86] J.E. Yoo, K. Lee, A. Tighineanu, P. Schmuki, Highly ordered TiO2 nanotube-stumps with memristive response, Electrochemistry Communications. 34 (2013) 177-180.

DOI: 10.1016/j.elecom.2013.05.038

[87] D. Acharyya, A. Hazra and P. Bhattacharyya, Microelectronics Reliability 54, 541-560 (2014).

[88] A. Fujishima, K. Honda, Electrochemical photolysis of water at a semiconductor electrode, Nature 238 (1972) 37-38.

DOI: 10.1038/238037a0

[89] M.M. Rahman, A.J.S. Ahammad, J.H. Jin, S.J. Ahn, J.J. Lee, A comprehensive review of glucose biosensors based on nanostructured metal-oxides, Sensors 10 (2010) 4855-4886.

DOI: 10.3390/s100504855

[90] J.G. Li, T. Ishigaki, X. Sun, Anatase, Brookite, and Rutile nanocrystals via redox reactions under mild hydrothermal conditions: phase-selective synthesis and physicochemical properties, J. Phys. Chem. C, 111 (2007) 4969-4976.

DOI: 10.1021/jp0673258

[91] C.Y. Hsiao, C.L. Lee, D.F. Ollis, heterogeneous photocatalysis - degradation of dilute-solutions of dichloromethane (Ch2cl2), chloroform (Chcl3), and carbon-tetrachloride (CCl4) with illuminated TiO2 photocatalyst,J. Catal. 82 (1983) 418-423.

DOI: 10.1016/0021-9517(83)90208-7

[92] S.N. Frank, A.J. Bard, Heterogeneous photocatalytic oxidation of cynide ion in aqueous solutions at Titanium dioxide powder,J. Am. Chem. Soc. 99 (1977) 303-304.

DOI: 10.1021/ja00443a081

[93] Y. Li, L. Jia, C. Wu, S. Han, Y. Gong, B. Chia, J. Pu, L. Jian, Mesoporous (N, S)-codoped TiO2 nanoparticles as effective photoanode for dye-sensitized solar cells, J. Alloys Comp. 512 (2012) 23-26.

DOI: 10.1016/j.jallcom.2011.08.072

[94] N.N. Wei, T. Han, G.Z. Deng, J.L. Li, J.Y. Du, Synthesis and characterizations of three dimensional ordered gold nanoparticle doped titanium dioxide photonic crystals, Thin Solid Films, 519 (2011) 2409-2414.

DOI: 10.1016/j.tsf.2010.11.045

[95] G. Redmond, D. Fitzmaurice, M. Gratzel, Visible light sensitization by cis-bis (thiocynato) bis (2, 2'- bipyridyl – 4, 4'- dicaboxylato) ruthenium(II) of a transparent nanocrystalline. Chem. Mater. 6 (1994) 686-691.

DOI: 10.1021/cm00041a020

[96] H. Rensmo, K. Keis, H. Lindstrom, S. Sodergren, A. Solbrand, A. Hagfeldt, S. E. Lindquist, L. N. Wang, and M. Muhammed, High light-to-energy conversion efficiencies for solar cells based on nanostructured ZnO electrodes, J. Phys. Chem. B 101(1997).

DOI: 10.1021/jp962918b

[97] T. N. Rao and L. Bahadur, Photoelectrochemical studies on dye-sensitized particulate ZnO thin-film photoelectrodes in non-aqueous media, J. Electrochem. Soc. 144 (1997) 179-185.

DOI: 10.1149/1.1837382

[98] K. Keis, L. Vayssieres, S. E. Lindquist, A. Hagfeldt, Nanostructured ZnO electrodes for photovoltaic applications, Nanostruct. Mater. 12 (1999) 487-490.

DOI: 10.1016/s0965-9773(99)00165-8

[99] C. Bauer, G. Boschloo, E. Mukhtar, A. Hagfeldt, Electron injection and recombination in Ru(dcbpy)(2)(NCS)(2) sensitized nanostructured ZnO, Journal of Physical Chemistry B 105 (2001) 5585-5588.

DOI: 10.1021/jp004121x

[100] F. Wang, Z. Ye, D. Ma, L. Zhu, F. Zhuge, Formation of quasi-aligned ZnCdO nanorods and nanoneedles, J. Cryst. Growth 283 (2005) 373-377.

DOI: 10.1016/j.jcrysgro.2005.05.063

[101] V.A. Fonoberov, K.A. Alim, A.A. Balandin, Photoluminescence investigation of the carrier recombination processes in ZnO quantum dots and nanocrystals, Phys. Rev. B 73 (2006) 165317(9).

DOI: 10.1103/physrevb.73.165317

[102] B.S. Li, Y.C. Liu, Z.Z. Zhi, D.Z. Shen, Y.M. Lu, J.Y. Zhang, X.W. Fan, The photoluminescence of ZnO thin films grown on Si (1 0 0) substrate by plasma-enhanced chemical vapor deposition, J. Cryst. Growth 240(2002) 479-483.

DOI: 10.1016/s0022-0248(02)00929-6

[103] B.K. Meyer, H. Alves, D.M. Hofmann, W. Kriegseis et al., Bound exciton and donor-acceptor pair recombination in ZnO. Phys. Stat. Sol., 241 (2004) 231-260.

DOI: 10.1002/pssb.200301962

[104] T. Ren, H.R. Baker, K.M. Poduska, Optical absorption edge shifts in electrodeposited ZnO thin films. " Thin Solid Films 515 (2007) 7976-7983.

DOI: 10.1016/j.tsf.2007.03.185

[105] Z.L. Wang, Zinc Oxide Nanostructures: Growth, Properties and Applications, J. Phys. Condens. Matter 16 (2004) 829-858.

[106] Y. Ding, Z.L. Wang, Structures of planar defects in ZnO nanobelts and nanowires, Micron, 40 (2009) 335-342.

DOI: 10.1016/j.micron.2008.10.008

[107] G.H. Lee, Y. Yamamoto, M. Kourogia, M. Ohtsua, Blue shift in room temperature photoluminescence from photo-chemical vapor deposited ZnO films, Thin Solid Films 386 (2001) 117-120.

DOI: 10.1016/s0040-6090(01)00764-7

[108] M. Risti, S. Music, M. Ivanda, S. Popovic, Sol–gel synthesis and characterization of nanocrystalline ZnO powders, J. Alloys Comp. 397 (2005) L1-L4.

DOI: 10.1016/j.jallcom.2005.01.045

[109] S.S. Pareek, K. Pareek, An Empirical Study on Structural, Optical and Electronic Properties of ZnO Nanoparticles, IOSR-JAP. 3 (2013) 16-24.

DOI: 10.9790/4861-0321624

[110] E. Gale, R. Mayne, A. Adamatzky, B.L. Costello, Drop-coated titanium dioxide memristors, Mater. Chem. Phys. 143 (2014) 524-529.

DOI: 10.1016/j.matchemphys.2013.09.013

[111] A. Beck, J.G. Bednorz, C. Gerber, C. Rossel, D. Sidmer, Reproducible switching effect in thin oxide films for memory applications, Appl. Phys. Lett. 77 (2000) 139-141.

DOI: 10.1063/1.126902

[112] J.E. Yoo, K. Lee, A. Tighineanu and P. Schmuki, Highly ordered TiO2 nanotube-stumps with memristive response, Electrochemistry Communications 34 (2013) 177-180.

DOI: 10.1016/j.elecom.2013.05.038

[113] D.J. Kim, H. Lu, S. Ryu, S. Lee, C.W. Bark, C.B. Eom, A. Gruverman, Retention of resistance states in ferroelectric tunnel memristors, Appl. Phys. Lett. 103 (2013)142908 (1-4).

DOI: 10.1063/1.4823989