Vertically ordered hematite nanotube array as an ultrasensitive and rapid response acetone sensor.

Vertically ordered nanotube array is a desirable configuration to improve gas sensing properties of the hematite which is the most abundant and cheapest metal oxide semiconductor on earth but has low and sluggish chemiresistive responses. We have synthesized a vertically aligned, highly ordered hematite nanotube array directly on a patterned SiO2/Si substrate and then it used as a gas sensor without additional processing. The nanotube array sensor shows unprecedentedly ultrahigh and selective responses to acetone with detection limits down to a few parts per billion and response time shorter than 3 s.

[1]  M. Pina,et al.  Total combustion of methyl-ethyl ketone over Fe2O3 based catalytic membrane reactors , 2003 .

[2]  M. Meyyappan,et al.  Carbon Nanotube Sensors for Gas and Organic Vapor Detection , 2003 .

[3]  Craig A. Grimes,et al.  Transparent Highly Ordered TiO2 Nanotube Arrays via Anodization of Titanium Thin Films , 2005 .

[4]  Jun Chen,et al.  α‐Fe2O3 Nanotubes in Gas Sensor and Lithium‐Ion Battery Applications , 2005 .

[5]  Tongtong Wang,et al.  Contact-controlled sensing properties of flowerlike ZnO nanostructures , 2005 .

[6]  Bin Yan,et al.  Morphology Controllable Synthesis of α-Fe2O3 1D Nanostructures: Growth Mechanism and Nanodevice Based on Single Nanowire , 2008 .

[7]  Shudong Zhang,et al.  Hematite Hollow Spheres with a Mesoporous Shell: Controlled Synthesis and Applications in Gas Sensor and Lithium Ion Batteries , 2008 .

[8]  Xiaoliang Fang,et al.  Single-crystal-like hematite colloidal nanocrystal clusters: synthesis and applications in gas sensors, photocatalysis and water treatment , 2009 .

[9]  Chuji Wang,et al.  Breath Analysis Using Laser Spectroscopic Techniques: Breath Biomarkers, Spectral Fingerprints, and Detection Limits , 2009, Sensors.

[10]  M. Misra,et al.  Water Photooxidation by Smooth and Ultrathin α-Fe2O3 Nanotube Arrays , 2009 .

[11]  P. Schmuki,et al.  Properties of the Nanoporous Anodic Oxide Electrochemically Grown on Steel in Hot 50% NaOH , 2009 .

[12]  Byeong Kwon Ju,et al.  A facile fabrication of semiconductor nanowires gas sensor using PDMS patterning and solution deposition , 2009 .

[13]  Sotiris E. Pratsinis,et al.  Si:WO3 sensors for noninvasive diabetes diagnosis by breath analysis , 2010, 2010 IEEE Sensors.

[14]  P. Chu,et al.  Glycine-assisted hydrothermal synthesis of peculiar porous alpha-Fe2O3 nanospheres with excellent gas-sensing properties. , 2010, Analytica chimica acta.

[15]  Bin Chen,et al.  A hydrothermal method for preparation of α-Fe2O3 nanotubes and their catalytic performance for thermal decomposition of ammonium perchlorate , 2010 .

[16]  C. Grimes,et al.  Low temperature crystallization of transparent, highly ordered nanoporous SnO₂ thin films: application to room-temperature hydrogen sensing. , 2011, Nanoscale.

[17]  G. Lu,et al.  Synthesis and gas sensing properties of bundle-like α-Fe2O3 nanorods , 2011 .

[18]  Lei Zhang,et al.  Three-dimensionally ordered and wormhole-like mesoporous iron oxide catalysts highly active for the oxidation of acetone and methanol. , 2011, Journal of hazardous materials.

[19]  Guozhong Cao,et al.  Template-free solvothermal synthesis of hollow hematite spheres and their applications in gas sensors and Li-ion batteries , 2011 .

[20]  Zhian Zhang,et al.  Highly ordered iron oxide nanotube arrays as electrodes for electrochemical energy storage , 2011 .

[21]  Haojie Song,et al.  Controllable fabrication, growth mechanism, and gas sensing properties of hollow hematite polyhedra , 2012 .

[22]  Xiaofei Yang,et al.  Flexible morphology-controlled synthesis of monodisperse α-Fe2O3 hierarchical hollow microspheres and their gas-sensing properties , 2012 .

[23]  Peng Sun,et al.  Hydrothermal synthesis of 3D urchin-like α-Fe2O3 nanostructure for gas sensor , 2012 .

[24]  Jaclyn Teo,et al.  Ultrahigh sensitivity of Au/1D α-Fe2O3 to acetone and the sensing mechanism. , 2012, Langmuir : the ACS journal of surfaces and colloids.

[25]  Guoxiu Wang,et al.  Synthesis of tuneable porous hematites (α-Fe2O3) for gas sensing and lithium storage in lithium ion batteries , 2012 .

[26]  Zhifeng Dou,et al.  Synthesis, self-assembly, and high performance in gas sensing of X-shaped iron oxide crystals. , 2012, ACS applied materials & interfaces.

[27]  Z. Chang,et al.  Sea urchin-like Ag–α-Fe2O3 nanocomposite microspheres: synthesis and gas sensing applications , 2012 .

[28]  Dianzeng Jia,et al.  Low-heating solid-state synthesis and excellent gas-sensing properties of α-Fe2O3 nanoparticles , 2013 .

[29]  N. Yamazoe,et al.  Proposal of contact potential promoted oxide semiconductor gas sensor , 2013 .

[30]  Q. Gao,et al.  Gas sensors based on alpha-Fe2O3 nanorods, nanotubes and nanocubes. , 2013, Journal of nanoscience and nanotechnology.

[31]  G. Lu,et al.  Controlled synthesis of hierarchical Sn-doped α-Fe2O3 with novel sheaf-like architectures and their gas sensing properties , 2013 .

[32]  Amine Bermak,et al.  Self-gating effect induced large performance improvement of ZnO nanocomb gas sensors. , 2013, ACS nano.