Temperature dependence of the piezotronic effect in CdS nanospheres

Puneetha, Peddathimula; Mallem, Siva Pratap Reddy; Bathalavaram, Poornaprakash; Lee, Jung‐Hee; Shim, Jaesool

doi:10.1016/j.nanoen.2021.105923

Cited by 19 publications

(7 citation statements)

References 43 publications

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“…The strain sensitivity of SFT is more than 10 times higher than that of the state-ofthe-art Si nanowire-based strain sensor (~200) and even larger than the most of piezoresistive/piezoelectric nanodevices (<2000) (Fig. 4 and table S1) (17,(42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55)(56)(57)(58)(59)(60). The sensitivity of SFT could be further improved once the dimension (including the length) of Si reduces to nanometer scale.…”

Section: Sensing Performance Of the Flexoelectronic Transistorsmentioning

confidence: 98%

Silicon flexoelectronic transistors

Guo

Ren

et al. 2023

Sci. Adv.

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It is extraordinarily challenging to implement adaptive and seamless interactions between mechanical triggering and current silicon technology for tunable electronics, human-machine interfaces, and micro/nanoelectromechanical systems. Here, we report Si flexoelectronic transistors (SFTs) that can innovatively convert applied mechanical actuations into electrical control signals and achieve directly electromechanical function. Using the strain gradient–induced flexoelectric polarization field in Si as a “gate,” the metal-semiconductor interfacial Schottky barriers’ heights and the channel width of SFT can be substantially modulated, resulting in tunable electronic transports with specific characteristics. Such SFTs and corresponding perception system can not only create a high strain sensitivity but also identify where the mechanical force is applied. These findings provide an in-depth understanding about the mechanism of interface gating and channel width gating in flexoelectronics and develop highly sensitive silicon-based strain sensors, which has great potential to construct the next-generation silicon electromechanical nanodevices and nanosystems.

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Section: Sensing Performance Of the Flexoelectronic Transistorsmentioning

confidence: 98%

Silicon flexoelectronic transistors

Guo

Ren

et al. 2023

Sci. Adv.

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Section: Introductionmentioning

confidence: 99%

“…The development of strain-controlled sensors incorporating nanomaterials such as nanowires, nanotubes, nanoparticles, and thin films has attracted significant interest [ 6 , 7 ]. For instance, strain-controlled sensors comprising zinc oxide nanowires, graphene, and carbon nanotubes are potential alternatives for the fabrication of new strain-controlled sensors owing to their appealing properties [ 7 , 8 , 9 , 10 ]. In graphene-based strain-controlled sensors, the electrical conductance and principal vibrational frequency of graphene actively depend on its topological structure, which can be controlled by applying strain, making it useful for high-sensitivity strain detection [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Strain-Modulated Flexible Bio-Organic/Graphene/PET Sensors Based on DNA-Curcumin Biopolymer

Mallem,

Puneetha,

Lee

et al. 2024

Biomolecules

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In recent years, there has been growing interest in the development of metal-free, environmentally friendly, and cost-effective biopolymer-based piezoelectric strain sensors (bio-PSSs) for flexible applications. In this study, we have developed a bio-PSS based on pure deoxyribonucleic acid (DNA) and curcumin materials in a thin-film form and studied its strain-induced current-voltage characteristics based on piezoelectric phenomena. The bio-PSS exhibited flexibility under varying compressive and tensile loads. Notably, the sensor achieved a strain gauge factor of 407 at an applied compressive strain of −0.027%, which is 8.67 times greater than that of traditional metal strain gauges. Furthermore, the flexible bio-PSS demonstrated a rapid response under a compressive strain of −0.08%. Our findings suggest that the proposed flexible bio-PSS holds significant promise as a motion sensor, addressing the demand for environmentally safe, wearable, and flexible strain sensor applications.

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“…The piezoelectric field generated by the CdS material promotes charge transfer and separation, thus enabling the efficient decomposition of pure water. [20][21][22][23][24][25][26][27][28][29][30] Ultrathin two-dimensional (2D) nanomaterials are considered ideal catalytic materials due to their high specific surface area and exposure of surface active sites, making them extremely desirable for numerous applications. [31][32][33] Moreover, ultra-thin materials tend to be easily deformed, and their large plane size can ensure a large mechanical energy capture area.…”

Section: Introductionmentioning

confidence: 99%

“…The piezoelectric field generated by the CdS material promotes charge transfer and separation, thus enabling the efficient decomposition of pure water. 20–30…”

Section: Introductionmentioning

confidence: 99%