Ionic‐Liquid Gating of InAs Nanowire‐Based Field‐Effect Transistors

Lieb, J.; Demontis, Valeria; Prete, Domenic; Ercolani, Daniele; Zannier, Valentina; Sorba, L.; Ono, Shimpei; Beltram, Fabio; Sacépé, Benjamin; Rossella, Francesco

doi:10.1002/adfm.201804378

Cited by 41 publications

(34 citation statements)

References 70 publications

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“…Compared to Schottky contact that is usually observed in nanowire‐based photodetectors, Ohmic contact certifies that there are no or negligible photoinduced carriers trapped at the interface between the Au electrodes and the InI flake. [ 44,45 ] The relationship between the photocurrent and 532 nm light source intensity is highlighted in Figure 5c. Fitting the plot with power‐law stated as I ph = P θ where θ = 0.99 indicates a sublinear behavior where the photocurrent is determined by a photoconductive mechanism.…”

Section: Resultsmentioning

confidence: 99%

Space‐Confined Growth of 2D InI Showing High Sensitivity in Photodetection

Suleiman

Huang

Jin

et al. 2020

Adv Elect Materials

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Layered InI has a great potential in optoelectronic applications due to its direct wide tunable bandgap. However, there is no single report about its 2D synthesis. Here, the growth of high‐quality and ultrathin InI flake (as thin as 8 nm) is reported via space‐confined physical vapor deposition. Impressively, an InI flake‐based photodetector exhibits an ultralow off‐state current of ≈4.2 × 10−12 A, high on/off photocurrent ratio of 104, excellent detectivity of 4.2 × 1012 Jones, a high‐speed response time of 10 ms, as well as excellent effective quantum efficiency of 1600%, suggesting its promising applications in optoelectronics.

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Section: Resultsmentioning

confidence: 99%

Space‐Confined Growth of 2D InI Showing High Sensitivity in Photodetection

Suleiman

Huang

Jin

et al. 2020

Adv Elect Materials

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“…The paramagnetic behavior of our Fe-functionalized sporopollenin was demonstrated thanks to electron paramagnetic resonance and magnetization measurements. The present strategy of combining ionic liquids’ chemical properties, which allow for sporopollenin isolation from pollen grain, together with the modification of magnetic properties is of interest in view of the simultaneous functionalization and field effect control of semiconductor-based nanodevices 31 . Besides, while nanoscale architectures based on inorganic systems functionalized with metals represent a solid playground for advanced studies across magnetism, electronics and photonics at large 32 – 35 , the Fe-functionalized organic microparticles investigated in the present work bear great potential for applications in biotechnology, biomedicine and microrobotic.…”

Section: Resultsmentioning

confidence: 99%

Fe-functionalized paramagnetic sporopollenin from pollen grains: one-pot synthesis using ionic liquids

Chiappe

Rodriguez‐Douton

Mozzati

et al. 2020

Sci Rep

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the preparation of fe-decorated sporopollenins was achieved using pollen grains and an ionic liquid as solvent and functionalizing agent. the integrity of the organic capsules was ascertained through scanning electron microscopy studies. The presence of Fe in the capsule was investigated using FT-IR, X-ray photoemission spectroscopy and energy-dispersive X-ray spectroscopy. electron paramagnetic resonance and magnetization measurements allowed us to demonstrate the paramagnetic behavior of our Fe-functionalized sporopollenin. A few potential applications of pollen-based systems functionalized with magnetic metal ions via ionic liquids are discussed. Highly organized and complex 3D microstructures hold great promise for manifold applications across nanotechnologies as carriers, scavengers or catalysts, to name a few possible functional uses 1-4. Driven by these exciting prospects, great efforts have been devoted in the last few years to the preparation of polymeric microcapsules through different routes, including template-assisted methods, self-assembly of block copolymer processes, and interfacial mini-emulsion polymerization methods 5-8. However, the synthesis of such structures is generally costly and difficult, especially when obtaining microcapsule of uniform size distribution and large inner cavity is crucial. In this context, innovative strategies are progressively moving beyond artificial material synthesis and looking to nature for inspiration. In particular, scientists have started to appreciate the myriad of unique, widely available biological systems and their microscale and nanoscale architectures that might be useful for the design and fabrication of functional materials. For instance, viruses, large globular proteins like ferritin, chromatids are nanoscale structures; Larger-still microscale-structures are pollen grains. In this scenario, pollen grains represent a very promising source of 3D microstructures with desirable morphologies: they can indeed be easily sourced in large amounts from plants and can provide, through cost-effective approaches, polymeric microcapsules with a wide variety of shape and size. These features, and most importantly their consistency which is guaranteed by the species specificity, are crucial and difficult to obtain with purely synthetic materials 9-11. In pollen grains, the male partner in the reproductive process, the genetic material is protected by a double-layered wall, which consists of an inner layer (intine) and an outer layer (exine). The former is constituted mainly of cellulose, hemicellulose and pectin, whereas the latter, known as sporopollenin (SP) is composed largely of a biopolymer, whose chemical structure is still unclear, containing only carbon, hydrogen and oxygen atoms. This polymer is characterized by remarkable strength and elasticity. Furthermore, it shows an extraordinary resistance to chemical degradation or dissolution while being at the same time readily amenable to derivatization due to the presence of a network of functional groups (carbo...

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“…[ 79,80 ] This has been experimentally demonstrated by exploiting an electric field to control ion concentration of electrolyte at solid–liquid interface. [ 81–83 ] Noteworthy, heterogenous electrocatalysis takes place at catalyst–electrolyte interface. [ 84 ] In light of these discussions, the dynamics of HER, which is sensitive to heterogenous charge transfer rate, can be effectively tuned by leveraging an external electric field.…”

Section: Electric Field‐assisted Electrocatalytic Her/oermentioning

confidence: 99%

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

et al. 2020

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promising alternative to fossil fuels. Water electrolysis by renewable resourcederived electricity represents a facile and green route to produce H 2. [1-13] Generally, the key to implement high-performance water splitting is to develop economically viable, efficient, and robust electrocatalysts to lower the activation potential barriers. Thus far, researchers have devoted extensive enthusiasm to the investigation of electrocatalysts. Currently, most efforts have been taken on the search for new materials, [14-16] regulation of morphology, [17] crystallinity, [18] facet, [19] component, [20-24] defect, [25,26] matter phase, [27,28] or the compositing of various materials with synergy. [29-36] However, the performances of emerging nonnoble electrocatalysts still lag behind those of noble ones. To address this issue, researchers have turned their attention beyond the electrocatalysts themselves. Field-assisted electrocatalysis is the electrocatalytic reaction proceeded in the presence of a field. It represents a promising methodology since it exerts an additional degree of freedom to engineer an electrochemical process. Inspiringly, indisputable improvements in electrocatalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been implemented with the assist of various fields, including electric field, magnetic field, strain, and light. For example, the electrocatalytic HER of a MoS 2 nanosheet is markedly boosted by simply exploiting a back gate voltage of 5 V. [37] Its overpotential at −100 mA cm −2 is decreased from 240 to 38 mV. In addition, enhancement of alkaline water electrolysis is achieved by applying a moderate magnetic field (≤450 mT) to an electrocatalytic anode consists of highly magnetic electrocatalysts. [38] Its current density increments are beyond 100%. Furthermore, the HER activity of β-PdH x increases monotonically as the applied strain increases from 0% to 4.5%. [39] Lastly, an approximately threefold increase in current density of Au-MoS 2 for electrocatalytic HER is realized upon the illumination of IR light. [40] These results undoubtedly elucidate that applying a field during electrocataly sis opens up great opportunities toward further improving electrocatalytic activity. Moreover, this approach provides merits of facile, dynamical, continuous, reversible, and universal control. Despite fascinating achievements, these investigations are relatively scattered. The underneath mechanisms and principles Hydrogen fuel is considered as one of the most clean renewable resources, warranting it a primary alternative to fossil fuels for future energy supplies. Electrocatalytic water splitting is an eco-friendly technique for high-purity hydrogen production. However, the sluggish dynamics of its two halfreactions, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), are tough challenges impeding the practical application of this technology. In these years, external field-assisted HER and OER have attracted extensive research interests. Herein, the effects o...

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Ionic‐Liquid Gating of InAs Nanowire‐Based Field‐Effect Transistors

Cited by 41 publications

References 70 publications

Space‐Confined Growth of 2D InI Showing High Sensitivity in Photodetection

Space‐Confined Growth of 2D InI Showing High Sensitivity in Photodetection

Fe-functionalized paramagnetic sporopollenin from pollen grains: one-pot synthesis using ionic liquids

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

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