Cold cathode electron emission with ultralow turn-on fields from Au-nanoparticle-decorated self-organized Si nanofacets

Saini, Mahesh; Singh, Ranveer; Sooraj, K.P.; Basu, Tanmoy; Roy, Abhijit Sinha; Satpati, Biswarup; Srivastava, S. K.; Ranjan, Mukesh; Som, T.

doi:10.1039/d0tc03862h

Cited by 9 publications

(8 citation statements)

References 69 publications

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“…Usually, energetic ion-induced self-organized ripple patterns form as a result of a dynamic balance between the two competing processes of erosion-induced roughening and diffusion-induced smoothening of the implanted surface, depending upon the ion-energy,fluence, and incident angle of ions, as reported in different material systems. [36,41,42] An AFM topographical image of the implanted TiO x film surface subjected to the fluence of 1 × 10 17 ions cm −2 (named as T2), is depicted in Figure S3c, Supporting Information. The periodicity of the pattern seen on the implanted TiO x surface becomes clearly evident from the corresponding 2D FFT and ACF images shown in the top left and right corners of both Figure S3b,c, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…[30,32] As a result, anisotropic, electrical, [36] magnetic, [37,38] and optical properties [39,40] are realized. In addition, patterned surfaces are promising for cold cathode electron emission, [41,42] biology [43] as well as nano bio-electronic applications. [43] Moreover, if the implanted (metal) atoms occupy preferential sites on a patterned surface, the latter can exhibit tunable electrical properties at nanoscale.…”

Section: Introductionmentioning

confidence: 99%

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Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface

Hasina,

Saini,

Kumar

et al. 2023

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Neuromorphic computing is a potential approach for imitating massive parallel processing capabilities of a bio‐synapse. To date, memristors have emerged as the most appropriate device for designing artificial synapses for this purpose due to their excellent analog switching capacities with high endurance and retention. However, to build an operational neuromorphic platform capable of processing high‐density information, memristive synapses with nanoscale footprint are important, albeit with device size scaled down, retaining analog plasticity and low power requirement often become a challenge. This paper demonstrates site‐selective self‐assembly of Au nanoparticles on a patterned TiOx layer formed as a result of ion‐induced self‐organization, resulting in site‐specific resistive switching and emulation of bio‐synaptic behavior (e.g., potentiation, depression, spike rate‐dependent and spike timing‐dependent plasticity, paired pulse facilitation, and post tetanic potentiation) at nanoscale. The use of local probe‐based methods enables nanoscale probing on the anisotropic films. With the help of various microscopic and spectroscopic analytical tools, the observed results are attributed to defect migration and self‐assembly of implanted Au atoms on self‐organized TiOx surfaces. By leveraging the site‐selective evolution of gold‐nanostructures, the functionalized TiOx surface holds significant potential in a multitude of fields for developing cutting‐edge neuromorphic computing platforms and Au‐based biosensors with high‐density integration.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface

Hasina,

Saini,

Kumar

et al. 2023

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“…Low-energy ion beam sputtering (IBS) is a versatile technique with numerous applications in various fields such as plasmonics, nanoelectronics, nanomagnetism, and many more [1][2][3][4][5][6][7]. It offers a promising method for largescale fabrication of nanopatterns on different materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of facet evolution on Si surfaces bombarded with Xe ions

Hans,

Kumar Parida,

Augustine

et al. 2024

Phys. Scr.

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This study investigates the formation of facets on Si surface under Xe ion irradiation using an ion energy of 0.5 keV. By examiningthe effects of ion incidence angle (60°- 85°), fluence (4.5 × 1018 to 1.35 × 1019 ions/cm2), and temperature (RT to 200 ◦C), weexplore the evolution of facets. The surface roughness displays a distinct trend, reaching its peak when the ion incidence angle is 80°,which indicates the formation of faceted structures due to a sudden change in roughness. Additionally, temperature studies highlightthe important role of temperature in enhancing facet arrangement. To support experimental findings, numerical simulation usingAnisotropic Kuramoto-Sivashinsky (AKS) equation is employed. These simulations provide valuable insights into the dynamics offacet evolution, allowing us to better understand how curvature-dependent sputtering yield, dispersion, and diffusion collectivelyinfluence the formation and morphology of facets on the Si surface under Xe ion irradiation.

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“…Electrons are emitted as soon as the electric eld is applied and consequently, this process has a fast switch-on time 11 . Nowadays, researchers are working in cold cathode eld emission materials due to many applications such as microwave power ampli ers space technology, extreme ultraviolet (EUV) and UVC light, crystallization of amorphous materials, electron microscopy, and X-ray source technology [12][13][14][15][16][17] . It has many advantages as compared to the forest-type CNT emitter.…”

Section: Introductionmentioning

confidence: 99%

Optimization of vertically aligned carbon nanotube beam trajectory with the help of focusing electrode in the microchannel plate

Adhikari

Bhotkar

Patil

et al. 2023

Preprint

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The focusing electrode plays an important role to reduce the electron beam trajectory with low dispersion and high brightness. This article summarizes the importance of the vertically aligned multi-walled carbon nanotube effect with the focusing electrode. First of all, the effect of electron beam trajectory is studied with the different heights, hole sizes, and applied voltage of the focusing electrode by the opera 3D simulation. The field emission electron beam spot is captured in the microchannel plate which helps to reduce the signal noise effect and damage of CNT tips by the joule heating effect. The high-dense bright spot is optimized at the focusing electrode hole size of 2 mm, and the height of 1 mm from the gate mesh electrode at the low bias voltage of -200 V without the loss of current. The FWHM of the electron beam is calculated 0.9 mm with its opening angle of 0.90 which could be applicable in high-resolution multi-electron beam microscopy and nano-focused X-ray system technology.

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Cold cathode electron emission with ultralow turn-on fields from Au-nanoparticle-decorated self-organized Si nanofacets

Abstract: Fabrication of highly dense conical nanostructures and their subsequent controlled metallization make them ideal candidates for enhancing cold cathode electron emission efficiency. For instance, hierarchical growth of self-assembled noble metal...

Cited by 9 publications

References 69 publications

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface

Investigation of facet evolution on Si surfaces bombarded with Xe ions

Optimization of vertically aligned carbon nanotube beam trajectory with the help of focusing electrode in the microchannel plate

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Cold cathode electron emission with ultralow turn-on fields from Au-nanoparticle-decorated self-organized Si nanofacets

Abstract: Fabrication of highly dense conical nanostructures and their subsequent controlled metallization make them ideal candidates for enhancing cold cathode electron emission efficiency. For instance, hierarchical growth of self-assembled noble metal...

Cited by 9 publications

References 69 publications

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiOx Surface

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiOx Surface

Investigation of facet evolution on Si surfaces bombarded with Xe ions

Optimization of vertically aligned carbon nanotube beam trajectory with the help of focusing electrode in the microchannel plate

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Product

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Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface

Site‐Specific Emulation of Neuronal Synaptic Behavior in Au Nanoparticle‐Decorated Self‐Organized TiO_x Surface