CuO based inorganic–organic hybrid nanowires: a new type of highly sensitive humidity sensor

The organic surfactant template method has been widely used for the preparation of CuO nanorods, nanotubes and nanowires. However, the surfactants in this system have no effect on the properties of the final products because they are flushed away. In this work, we used this method to synthesize a novel type of inorganic–organic hybrid nanowire via the hybridization between CuO and amphiphilic oligomer octadecyl, polyethylene glycol di-butenetrioate (O-B-EG-B). Here O-B-EG-B, as a structure director, was not flushed away but remained in the prepared hybrid nanowires because it was bound around CuO or entrapped in interior CuO. The hybrid nanowires showed CuO cores and P(O-B-EG-B) shells when the concentration of O-B-EG-B was 0.4 mg ml − 1, but exhibited P(O-B-EG-B) cores and CuO shells when the concentration of O-B-EG-B was 4.0 mg ml − 1. We found that the hybrid nanowires with P(O-B-EG-B) cores and CuO shells could sense a slight change in the relative humidity (RH) and respond by rapidly changing their conductivity. The resistance changed by about two orders of magnitude within the humidity range from 5% to 83.8%. Moreover, a humidity sensor based on this type of nanowire not only showed long-term stability but also exhibited excellent reversibility to moisture changes in air.

[1]  H. Tsao,et al.  Superhydrophilicity to superhydrophobicity transition of CuO nanowire films , 2010 .

[2]  Jiangfeng Chen,et al.  Waist cross-linked micelles synthesized via self-assembly guiding radical polymerization , 2009 .

[3]  Shuangxi Xing,et al.  Highly controlled core/shell structures: tunable conductive polymer shells on gold nanoparticles and nanochains , 2009 .

[4]  A. Patil,et al.  Fabrication of Continuous and Segmented Polymer/Metal Oxide Nanowires Using Cylindrical Micelles and Block Comicelles as Templates , 2009 .

[5]  Huan-Da Chen,et al.  Humidity-sensitive properties and conductance mechanisms of SnO2–K2O–LiZnVO4 , 2009 .

[6]  Ignacio R. Matias,et al.  A fibre optic humidity sensor based on a long-period fibre grating coated with a thin film of SiO2 nanospheres , 2009 .

[7]  G. Zou,et al.  A novel humidity sensor based on Na2Ti3O7 nanowires with rapid response-recovery , 2008 .

[8]  Che-Hsin Lin,et al.  A novel method to fabricate ion-doped microporous polyimide structures for ultra-high sensitive humidity sensing , 2008 .

[9]  S. Xiao,et al.  Structure and humidity sensing properties of barium strontium titanate/silicon nanoporous pillar array composite films , 2008 .

[10]  I. Manners,et al.  Fragmentation of fiberlike structures: sonication studies of cylindrical block copolymer micelles and behavioral comparisons to biological fibrils. , 2008, Journal of the American Chemical Society.

[11]  Zhuyi Wang,et al.  Synthesis, Characterization and Humidity Sensitive Properties of Nanocrystalline LaCoxFe1–xO3 , 2008 .

[12]  H. Tsao,et al.  Effects of geometrical characteristics of surface roughness on droplet wetting. , 2007, The Journal of chemical physics.

[13]  Jing Wang,et al.  Mechanism analysis of BaTiO3 and polymer QAR composite humidity sensor , 2007 .

[14]  G. Scholes,et al.  Cylindrical block co-micelles with spatially selective functionalization by nanoparticles. , 2007, Journal of the American Chemical Society.

[15]  Tong Zhang,et al.  Humidity sensitive properties of K+-doped nanocrystalline LaCo0.3Fe0.7O3 , 2007 .

[16]  S. Seal,et al.  One dimensional nanostructured materials , 2007, Progress in Materials Science.

[17]  Jing Li,et al.  From single to multiple atomic layers: a unique approach to the systematic tuning of structures and properties of inorganic-organic hybrid nanostructured semiconductors. , 2007, Journal of the American Chemical Society.

[18]  John T.W. Yeow,et al.  Carbon nanotube-enhanced capillary condensation for a capacitive humidity sensor , 2006 .

[19]  M. Hervieu,et al.  Evidence of the formation of a new rock-salt type compound Li2MgTiO4 and of its role on the properties of the Li doped MgTiO3 , 2006 .

[20]  Zhong Lin Wang,et al.  Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire Arrays , 2006, Science.

[21]  L. Wang,et al.  Novel approach to tuning the physical properties of organic-inorganic hybrid semiconductors. , 2006, Physical review letters.

[22]  Shuhong Yu,et al.  Nanocrystals of an Inorganic–Organic Hybrid Semiconductor: Formation of Uniform Nanobelts of [ZnSe](Diethylenetriamine)0.5 in a Ternary Solution , 2005 .

[23]  B. Tang,et al.  Water-dispersible polymer/Pd/Ni hybrid magnetic nanofibers , 2005 .

[24]  Jiming Ma,et al.  Simple Template-Free Solution Route for the Controlled Synthesis of Cu(OH)2 and CuO Nanostructures , 2004 .

[25]  Fanli Meng,et al.  Carboxylation multi-walled carbon nanotubes modified with LiClO4 for water vapour detection , 2004 .

[26]  B. Liu,et al.  Mesoscale organization of CuO nanoribbons: formation of "dandelions". , 2004, Journal of the American Chemical Society.

[27]  Huaiyong Zhu,et al.  Preparation and Electrochemical Performance of Polycrystalline and Single Crystalline CuO Nanorods as Anode Materials for Li Ion Battery , 2004 .

[28]  Weimin Zhang,et al.  Synthesis of Cu(OH)2 Nanowires at Aqueous−Organic Interfaces , 2004 .

[29]  H. Zeng,et al.  Controlled Synthesis and Self-Assembly of Single-Crystalline CuO Nanorods and Nanoribbons , 2004 .

[30]  Craig A. Grimes,et al.  Synthesis of CuO and Cu_2O crystalline nanowires using Cu(OH)_2 nanowire templates , 2003 .

[31]  C. Hsieh,et al.  Field emission from various CuO nanostructures , 2003 .

[32]  G. Ozin,et al.  Shell cross-linked cylinders of polyisoprene-b-ferrocenyldimethylsilane: formation of magnetic ceramic replicas and microfluidic channel alignment and patterning. , 2003, Journal of the American Chemical Society.

[33]  Enbo Wang,et al.  A controllable synthetic route to Cu, Cu2O, and CuO nanotubes and nanorods. , 2003, Chemical communications.

[34]  Charles M. Lieber,et al.  Nanoscale Science and Technology: Building a Big Future from Small Things , 2003 .

[35]  Jing Li,et al.  From 1D chain to 3D network: tuning hybrid II-VI nanostructures and their optical properties. , 2003, Journal of the American Chemical Society.

[36]  Younan Xia,et al.  One‐Dimensional Nanostructures: Synthesis, Characterization, and Applications , 2003 .

[37]  Kelly P. Knutsen,et al.  Single gallium nitride nanowire lasers , 2002, Nature materials.

[38]  N. S. Berzigiarova,et al.  Magnetic Resonant Mode in the Single-Layer High-Temperature Superconductor Tl2Ba2CuO6+δ , 2002, Science.

[39]  Qin Wei,et al.  Study on CuO–BaTiO3 semiconductor CO2 sensor , 2001 .

[40]  M. Laguës,et al.  Superconductivity in CaCuO2 as a result of field-effect doping , 2001, Nature.

[41]  B. Tang,et al.  Superparamagnetic Triblock Copolymer/Fe2O3 Hybrid Nanofibers , 2001 .

[42]  Jing Li,et al.  Inorganic−Organic Hybrid Composites Containing MQ (II−VI) Slabs: A New Class of Nanostructures with Strong Quantum Confinement and Periodic Arrangement , 2001 .

[43]  Victor Lara,et al.  A catalytic application of Cu2O and CuO films deposited over fiberglass , 2001 .

[44]  Jing Li,et al.  The First Covalent Organic-Inorganic Networks of Hybrid Chalcogenides: Structures That May Lead to a New Type of Quantum Wells , 2000 .

[45]  E. Solomon,et al.  Propylene Oxidation on Copper Oxide Surfaces: Electronic and Geometric Contributions to Reactivity and Selectivity , 1998 .

[46]  Yoshihiko Sadaoka,et al.  Humidity sensors based on polymer thin films , 1996 .

[47]  Jean-Marie Lehn,et al.  Comprehensive Supramolecular Chemistry , 1996 .

[48]  Chu,et al.  Superconductivity at 93 K in a new mixed-phase Yb-Ba-Cu-O compound system at ambient pressure. , 1987, Physical review letters.

[49]  R. N. Wenzel.  RESISTANCE OF SOLID SURFACES TO WETTING BY WATER , 1936 .

[50]  J. Bernard,et al.  Effect of hygrometry on dielectric materials , 2004 .

[51]  Masakazu Higuchi,et al.  Preparation of CuO thin films on porous BaTiO3 by self-assembled multibilayer film formation and application as a CO2 sensor , 1998 .