High‐Strain Sensors Based on ZnO Nanowire/Polystyrene Hybridized Flexible Films

Xu, Xiao; Yuan, Longyan; Zhong, Junwen; Ding, Tianpeng; Liu, Yu; Cai, Zhixiang; Rong, Yaoguang; Han, Hongwei; Zhou, Jun; Wang, Zhong Lin

doi:10.1002/adma.201103406

Cited by 520 publications

(410 citation statements)

References 32 publications

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“…Fig 1 shows SEM images of samples deposited on latticematched a-Al2O3 (with a lattice mismatch of 0.08% between (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) a-Al2O3 and (0001) ZnO) 37 using a Gd-doped ZnO target. Samples prepared at a partial oxygen pressure P(O2) = 15 mTorr are characterized by a continuous film (Fig 1a).…”

Section: Resultsmentioning

confidence: 99%

“…50 > + , (4) The same mechanism is employed to explain the absence of ZnO NRs on c-Al2O3. More specifically, no vertical and well defined NRs are observed on the sample deposited on the cAl2O3 (Fig 2a) due to a decrease in γs, as the relative surface energies of (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) a-Al2O3 and (0001) c-Al2O3 were estimated to be γ(11-20) = 1.12 γ(0001). 51 Therefore, the a-Al2O3 substrate surface energy and the uniform interfacial Gd nanolayer doping can play a significant role in the growth of high quality vertically aligned hexagonal ZnO NRs.…”

Section: Growth Mechanismmentioning

confidence: 99%

“…The substrate was mounted at a large distance (~9 cm) vertically above the target, and the vacuum chamber was pumped to 10 -6 Torr before target ablation. Next, the growth temperature was set to 650  C. The ZnO NRs were grown on lattice-matched (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) a-Al2O3 by focusing the beam on the Gd-doped ZnO target surface with a beam fluency of 5 ± 0.5 J/cm 2 . The deposition consisted of 30,000 laser pulses delivered at a frequency of 10 Hz.…”

Section: Introductionmentioning

confidence: 99%

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Homogeneous vertical ZnO nanorod arrays with high conductivity on an in situ Gd nanolayer

et al. 2015

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CitationFlemban TH, Singaravelu V, Sasikala Devi AA, Roqan IS (2015 We demonstrate a novel, one-step, catalyst-free method for the production of size-controlled vertical highly conductive ZnO NR arrays with highly desirable characteristics by pulsed laser deposition using a Gd-doped ZnO target. Our study shows that an in situ transparent and conductive Gd nanolayer (with a uniform thickness of ~1 nm) at the interface between a latticematched (11-20) a-sapphire substrate and ZnO is formed during the deposition. This nanolayer significantly induces relaxation mechanism that controls the dislocation distribution along the growth direction; which consequently improves the formation of homogeneous vertically aligned ZnO NRs. We demonstrate that both the lattice orientation of the substrate and the Gd characteristics are important in enhancing the NR synthesis, and we report precise control of the NR density by changing the oxygen partial pressure. We show that these NRs possess high optical and electrical quality, with a mobility of 177 cm 2 (V.s), which is comparable to the best-reported mobility of ZnO NRs. Therefore, this new and simple method has significant potential for improving the performance of materials used in a wide range of electronic and optoelectronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Growth Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Homogeneous vertical ZnO nanorod arrays with high conductivity on an in situ Gd nanolayer

et al. 2015

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“…Owing to the piezo-electric and semiconductor properties, ZnO NWs are suitable for gas sensors, solar cells, light emitting diodes, and energy harvesting materials [7]. Additionally, ZnO NWs can increase the interfacial strength between the fiber and matrix from their rigidity and strong affinity, where they can provide a better mechanism to transfer load from matrix to fiber by effective mechanical interlocking [8,9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nitrogen-doped Carbon Nanowire Arrays by Carbonization of Mussel-inspired Polydopamine

Oh¹,

Lee²,

Lee³

2016

Composites Research

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Based on mussel-inspired polydopamine (PDA), a novel technique to fabricate carbon nanowire (CNW) arrays is presented for a possible use of porous carbon electrode in electrochemical energy storage applications. PDA can give more porosity and nitrogen-doping effect to carbon electrodes, since it has high graphitic carbon yield characteristic and rich amine functionalities. Using such outstanding properties, the applicability of PDA for electrochemical energy storage devices was investigated. To achieve this, the decoration of the CNW arrays on carbon fiber surface was performed to increase the surface area for storage of electrical charge and the chemical active sites. Here, zinc oxide (ZnO) nanowire (NW) arrays were hydrothermally grown on the carbon fiber surface and then, PDA was coated on ZnO NWs. Finally, high temperature annealing was performed to carbonize PDA coating layers. For higher energy density, manganese oxide (MnO x ) nanoparticles (NPs), were deposited on the carbonized PDA NW arrays. The enlarged surface area induced by carbon nanowire arrays led to a 4.7-fold enhancement in areal capacitance compared to that of bare carbon fibers. The capacitance of nanowire-decorated electrodes reached up to 105.7 mF/cm 2 , which is 59 times higher than that of pristine carbon fibers.

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“…There are many types of strain gauges existing, such as piezoresistive materials (Si [4], carbon nanotube [5], carbon-black [6]. ), and piezoelectric material (lead zirconate titanate (PZT) [7], zinc oxide (ZnO) [8], poly(vinylidene fluoride, PVDF) [9,10]) on a flexible or stretchable substrate. Continuous artificial skin strain monitoring is a consistent need for biological applications, e.g.…”

Section: Introductionmentioning

confidence: 99%

Self-similar design for stretchable wireless LC strain sensors

Huang

Dong

Huang

et al. 2015

Sensors and Actuators A: Physical

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a b s t r a c tStretchable sensors provide a foundation for applications that exceed the scope of conventional device technologies due to their unique capacity to integrate with soft materials and curvilinear surfaces. This article presents the implementation and characterization of a large-area stretchable wireless RF strain sensor, operating at around 760 MHz, based on the concept of self-similar design. It has an electrical LC resonant circuit formed by a self-similar inductor coil and a capacitor to facilitate passive wireless sensor. The inductance of the wireless sensor varies with the elongation of the PDMS substrate, so is the resonance frequency of the sensor that is detected using an external coil linked to a vector network analyzer. Finite element modeling was used in combination with experimental verification to demonstrate that the wireless strain sensor with 300 m width can be stretched up to 40%. Self-similar structured coil incorporating variable inductance has been implemented to monitor the strain of artificial skin. Strain response of the stretchable wireless sensor has been characterized by experiments, and demonstrates high strain responsivity about 33.7 MHz/10%, which confirms the feasibility of strain sensing for biomedical and wearable applications.

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High‐Strain Sensors Based on ZnO Nanowire/Polystyrene Hybridized Flexible Films

Cited by 520 publications

References 32 publications

Homogeneous vertical ZnO nanorod arrays with high conductivity on an in situ Gd nanolayer

Homogeneous vertical ZnO nanorod arrays with high conductivity on an in situ Gd nanolayer

Preparation of Nitrogen-doped Carbon Nanowire Arrays by Carbonization of Mussel-inspired Polydopamine

Self-similar design for stretchable wireless LC strain sensors

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