Self‐Powered Nanosensors and Nanosystems

Wang, Zhong Lin

doi:10.1002/adma.201102958

Cited by 622 publications

(414 citation statements)

References 24 publications

(22 reference statements)

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“…This is very important when compared with micro-batteries whose finite lifetime could be a major problem when they have to be embedded in permanent structures, such as biomedical implants, active radio frequency identification tags and embedded micro-sensors where no maintenance or replacement is possible. As these micro-supercapacitors can be directly integrated on-chip, they may help to better extract the energy from solar, mechanical and thermal sources and thus make more efficient self-powered systems 33 . They could also be fabricated on the backside of solar cells in both portable devices and rooftop installations, to store power generated during the day for use after sundown, and thus may help provide electricity around the clock where connection to the grid is not possible.…”

Section: Fabrication Of Laser-scribed Graphene Micro-supercapacitorsmentioning

confidence: 99%

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

2013

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The rapid development of miniaturized electronic devices has increased the demand for compact on-chip energy storage. Microscale supercapacitors have great potential to complement or replace batteries and electrolytic capacitors in a variety of applications. However, conventional micro-fabrication techniques have proven to be cumbersome in building cost-effective micro-devices, thus limiting their widespread application. Here we demonstrate a scalable fabrication of graphene micro-supercapacitors over large areas by direct laser writing on graphite oxide films using a standard LightScribe DVD burner. More than 100 micro-supercapacitors can be produced on a single disc in 30 min or less. The devices are built on flexible substrates for flexible electronics and on-chip uses that can be integrated with MEMS or CMOS in a single chip. Remarkably, miniaturizing the devices to the microscale results in enhanced charge-storage capacity and rate capability. These microsupercapacitors demonstrate a power density of B200 W cm À 3 , which is among the highest values achieved for any supercapacitor.

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Section: Fabrication Of Laser-scribed Graphene Micro-supercapacitorsmentioning

confidence: 99%

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

2013

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“…70,71 Architecting atoms by rational means into materials has resulted in novel and highly enhanced functions as can be seen in photocatalysts 72,73 and spintronics materials. 74,75 Forming stimuli-responsive materials with softly deformable structures can lead to the development of innovative and unusual functional materials such as self-powered sensors 76 and hand-operatable molecular screening systems. 77,78 In these examples, functional units and elements are structured within rational designs to create new functions that cannot be obtained by simple combinations of the properties of the original materials in their bulk states.…”

Section: Biomedical Applicationsmentioning

confidence: 99%

Forming nanomaterials as layered functional structures toward materials nanoarchitectonics

et al. 2012

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Although progress in nanotechnology is anticipated to stimulate the development of innovative materials, the areas of nanotechnology and materials science are somehow separated with little common ground in current technologies. Nanotechnology has some analytical aspects that are beneficial mainly to the nanoscopic sciences at the atom or molecular levels. Experience of these advanced techniques has only been applied in synthetic approaches to macroscopic materials in rather immature level. Forming nanomaterials into hierarchic and organized structures is a rational way of preparing advanced functional materials. Recently, one of us coined the term materials' nanoarchitectonics to express this innovation. This review focuses on recent research to develop functional materials by forming nanomaterials into organized structures, especially in well-ordered layered structural motifs. This layered nanoarchitectonics can be achieved by using the versatile technology of layer-by-layer assembly. Reassembly of bulk materials into novel layered structures through layered nanoarchitectonics has created many innovative functional materials in a wide variety of fields as can be seen in ferromagnetic nanosheets, sensors, flame-retardant coatings, transparent conductors, electrodes and transistors, walking devices, drug release surfaces, targeting drug carriers and cell culturing.

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“…Therefore, it is a predominant candidate for the development of photonic devices in the UV, like laser, LEDs and photodetectors. When combining the ZnO properties with those inherent of nano-structures, like mechanical flexibility, promising materials for the development of solar cells, sensors, optic memories and basic elements for the construction of flexible and transparent electronics are obtained 4,5,8 . Last but not least, ZnO has high pizoelectricity, which makes it useful for the manufacturing of transductors and small electro-mechanical devices.…”

Section: Introductionmentioning

confidence: 99%

“…The use of low dimensional structures is a key technological factor in the creation of new functional and sensing devices which benefit from their large surface area to volume ratio [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

et al. 2013

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ZnO nanofibre networks (NFNs) were grown by vapour transport method on Si-based substrates. One type of substrate was SiO 2 thermally grown on Si and another consisted of a Si wafer onto which Si nanowires (NWs) had been grown having Au nanoparticles catalysts. The ZnO-NFN morphology was observed by scanning electron microscopy on samples grown at 600 °C and 720 °C substrate temperature, while an focused ion beam was used to study the ZnO NFN/Si NWs/Si and ZnO NFN/SiO 2 interfaces. Photoluminescence, electrical conductance and photoconductance of ZnO-NFN was studied for the sample grown on SiO 2 . The photoluminescence spectra show strong peaks due to exciton recombination and lattice defects. The ZnO-NFN presents quasi-persistent photoconductivity effects and ohmic I-V characteristics which become nonlinear and hysteretic as the applied voltage is increased. The electrical conductance as a function of temperature can be described by a modified three dimensional variable hopping model with nanometer-ranged typical hopping distances.

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Self‐Powered Nanosensors and Nanosystems

Cited by 622 publications

References 24 publications

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

Forming nanomaterials as layered functional structures toward materials nanoarchitectonics

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

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