Unleashing the Full Potential of Magnetoelectric Coupling in Film Heterostructures

Palneedi, Haribabu; Maurya, Deepam; Kim, Gi Yeop; Annapureddy, Venkateswarlu; Noh, Myoung Sub; Kang, Chong Yun; Kim, Jong Woo; Choi, Jong Jin; Choi, Si Young; Chung, Sung Yoon; Kang, Suk Joong L.; Priya, Shashank; Ryu, Jungho

doi:10.1002/adma.201605688

Cited by 56 publications

(60 citation statements)

References 36 publications

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“…It is known that the GSV process creates nanosized grains with large defect sites owing to the high‐energy collision of the particles/granules . The bandgap of the GSV‐WO 3–δ film was found to be 2.24 eV, which is derived from the UV–visible spectra assuming WO 3 is an indirect bandgap semiconductor (see Figure S5, Supporting Information), which is about 20% lower than that of bulk WO 3 .…”

Section: Resultsmentioning

confidence: 99%

“…The granule spray in vacuum (GSV) process is a unique deposition method for nanograined thick ceramic films. It involves room‐temperature spraying of binder‐less solid ceramic granules (i.e., free‐flowing agglomerates of fine particles) . This process started as a branch of aerosol deposition (AD), used for long‐term stability of powdered materials being fed to a nozzle .…”

Section: Introductionmentioning

confidence: 99%

“…To facilitate bombardment of the substrate with particles of high kinetic energy, micrometer‐sized metal oxide particles (or granules of them) can be accelerated to approximately sonic speed (≈300 m s −1 ), resulting in colliding with the target substrates and anchoring to the substrate and film growth, or anchoring to preexisting other films, at room temperature. Even though applications of AD or GSV films in various functional devices have been studied extensively, GSV films of semiconducting oxide have been less exploited for flexible gas‐sensing devices due to limitations such as their intrinsic brittleness and rigidity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors

Annapureddy

Kim

Hwang

et al. 2017

Adv Materials Inter

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Due to the increased world‐wide threat to health from air pollution, as well as the need for personalized diagnostic and physiological monitoring of exhaled breath, flexible gas sensor nodes have become an emerging area of critical importance for wearable electronics applicable. In this study, WO3−δ films are prepared on flexible substrates at room temperature using a single‐step, solid‐state deposition, granule spray in vacuum (GSV) process. The GSV‐WO3−δ films are successfully utilized to fabricate an ultrasensitive flexible gas sensor. The performance of the sensor can be enhanced by its increased surface area and large number of defect sites on the surface utilizing high‐impulse hollow sphere granules. The gas sensor is extremely responsive and selective to low concentration of NO2. The gas‐sensing responses are linear for the concentrations ranging from sub‐ppm to tens of ppm with detection limit of 1.88 (±0.128) for NO2. The response time is on the order of few seconds for gas detection (17 s) and recovery (25 s). Beyond this sensing performance, the GSV‐WO3−δ film is highly advantageous in terms of production cost and time for the realization of mass production of flexible sensing devices, compared to conventional gas sensors that require high‐cost and time‐consuming processes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors

Annapureddy

Kim

Hwang

et al. 2017

Adv Materials Inter

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“…Additionally, and for the purpose of this review, we are interested in the thermal effects induced upon LA, thus we are focusing our attention to the ns pulse regime; nevertheless. Nevertheless, the utilization of ps, fs, and CW lasers for metal‐oxide film processing is additionally reported. It is, therefore, worth addressing the connection between CW and pulsed LA, as a scanning CW process shares similar principles with pulsed LA albeit with significantly lower peak power, defined by the scanning speed and laser spot size rendering a ms interaction with the film (in contrast to the typical ns pulses provided by excimer lasers).…”

Section: Laser Annealingmentioning

confidence: 99%

Recent Progress in Photonic Processing of Metal‐Oxide Transistors

Yarali

Koutsiaki

Faber

et al. 2019

Adv Funct Materials

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(1 of 37)high mobility (µ) (even in amorphous phase), wide bandgap (transparent in the visible range), and the ability to be controllably doped. Importantly, they can be grown into thin films and various nanostructures with different scalable deposition techniques, including vacuum-based methods such as physical vapor deposition (PVD) [7,8] and chemical vapor deposition (CVD) [9] as well as solution-based processes such as spray [10] and spin coating. [11] Moreover, the resulting layers can be easily patterned using standard fabrication procedures and as such can be integrated into state-of-the-art processes for (opto)electronic applications. The above-mentioned capabilities have led to a plethora of applications such as switching backplanes for displays, transparent and flexible electronics, integrated circuits (ICs), photovoltaics (PVs), organic light-emitting diodes (OLEDs), capacitors, batteries, photocatalytic devices, electrochromics and memory devices, to name but a few. [8,[12][13][14] Because of their ability to be doped, their electronic properties can be tuned from dielectrics to semiconductors and conductors. This characteristic versatility has recently been exploited to stretch the range of their applications to new technological sectors, such as plasmonics in the near infrared and midinfrared spectral ranges. [12,15] One of the driving applications of metal oxides is in thinfilm transistors (TFTs) for large area electronics such as current driven optical displays and ICs. Following the early demonstrations, [16] most effort focused on the fabrication and processing of metal oxides TFTs paying particular attention to the device performance and applications. [1,5,6,17] Especially when processed over large areas, as in the case for display applications, the complexity to precisely control the device reliability and reproducibility becomes a challenging aspect of any TFT technology. To that respect, solution-based techniques progressed rapidly due to their lower cost and higher throughput compared to vacuum-based techniques. In both cases, the metal-oxide deposition has so far been limited to high processing temperatures (>250 °C) (Figure 1a) which renders the technology incompatible with inexpensive, temperature-sensitive substrates such as polymers, the material class of choice for various high throughput manufacturing techniques such as roll-to-roll (R2R) and sheet-to-sheet (S2S)Over the past few decades, significant progress has been made in the field of photonic processing of electronic materials using a variety of light sources. Several of these technologies have now been exploited in conjunction with emerging electronic materials as alternatives to conventional hightemperature thermal annealing, offering rapid manufacturing times and compatibility with temperature-sensitive substrate materials among other potential advantages. Herein, recent advances in photonic processing paradigms of metal-oxide thin-film transistors (TFTs) are presented with particular emphasis on the use of various light sour...

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“…[5][6][7][8][9] Search-coil, as a conventional magnetic sensor, has a high magnetic sensitivity, and its detectable magnetic field is as low as 20 fT/Hz 1/2 at 1 kHz. [16][17][18][19][20][21][22][23] Compared with magnetic sensors mentioned above, the ME sensor shows great potential for weak magnetic detection due to its superhigh magnetic field sensitivity. And the search-coil is often limited to the detection for the alternating current magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

Shi

Chen

et al. 2018

Adv Materials Technologies

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sensor consisting of a ferromagnetic material surrounded by two coils, one of which is a drive and the other one is a sensing coil, is another widely used magnetic field sensor. The major advantage of the fluxgate sensor over search coils is its ability to precisely measure the weak direct current (DC) magnetic field. However, a fluxgate sensor typically consumes much more power than a search-coil sensor does; also, its sizes are normally big, limiting its applications as a magnetic sensor array for magnetic positioning and imaging. Superconducting quantum interference device is designed based on the Josephson effect, exhibiting the highest sensitivity. However, the need for a liquid-helium coolant for a superconductor magnetometers makes the complete instrument rather bulky and costly. Hall effect sensor, also viewed as a widely used and low-cost sensor, is unfortunately unable to detect a magnetic field weaker than 100 nT.Meanwhile, there are various techniques for metal detecting and metal imaging. Electromagnetic wave-based imaging technologies, such as millimeter waves imaging [3,11] and terahertz waves imaging, [2][3][4] typically employ the difference of transmissivity and reflectivity among different materials. However, this very expensive millimeter wave or terahertz wave technology cannot easily distinguish magnetic objects from nonmagnetic ones. In the case of magnetic imaging for medical application, magnetic induction tomography (MIT), magnetic particle imaging (MPI), and nuclear magnetic resonance (NMR) are typically used. [12,13] MIT technology applies the magnetic field to detect the existence of the object that is going to image. [14,15] The detection principle of the MIT system is based on the giant magneto resistance effect, which shows a high spatial resolution but a very small magnetic detection range too. For MPI and NMR technologies, a good resolution could be obtained; however, a high magnetic intensity is normally assisted. [13] In addition, the superhigh cost and the relatively big size limit the civil applications of MPI and NMR technologies. In the field of metal detection or security checking, X-ray or terahertz waves imaging technologies are normally utilized. But the problem is the body damage of the X-ray passing through a person or the privacy protection issue.Magnetoelectric (ME) effect is defined as the polarization induced by a magnetic field (H) or the magnetization induced by an electric field (E). ME sensors, which consist of ferromagnetic/ferroelectric composite materials Although various magnetic sensors have been developed, tiny magnetic object detection is still a challenging issue in some cases, such as capsule position detection, endoscope navigation, and the detection of magnetic devices hidden in/on the human body. In this paper, a magnetic detecting and sketching system utilizing a 1D magnetic sensor array with 56 magnetoelectric (ME) sensing units is proposed. The ME sensors used in this system are based on a (1-1) connectivity Metglas/piezofiber composite operatin...

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Unleashing the Full Potential of Magnetoelectric Coupling in Film Heterostructures

Cited by 56 publications

References 36 publications

Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors

Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors

Recent Progress in Photonic Processing of Metal‐Oxide Transistors

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

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Unleashing the Full Potential of Magnetoelectric Coupling in Film Heterostructures

Cited by 56 publications

References 36 publications

Room‐Temperature Solid‐State Grown WO3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO2 Gas Sensors

Room‐Temperature Solid‐State Grown WO3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO2 Gas Sensors

Recent Progress in Photonic Processing of Metal‐Oxide Transistors

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

Contact Info

Product

Resources

About

Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors

Room‐Temperature Solid‐State Grown WO_3−δ Film on Plastic Substrate for Extremely Sensitive Flexible NO₂ Gas Sensors