Fabrication of nanoscale Ga balls via a Coulomb explosion of microscale silica-covered Ga balls by TEM electron-beam irradiation

Chen, Ying; Huang, Yanli; Liu, Nishuang; Su, Jun; Li, Luying; Gao, Yihua

doi:10.1038/srep11313

Cited by 15 publications

(9 citation statements)

References 33 publications

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“…Au ions. This is in agreement with the observations of Chen et al 22 who studied Ga microparticles (some coated with silica, some not) expelling their external layers as they were subjected to convergent e-beam irradiation. They explain that superficial charging of the Ga particles grows over time until a critical superficial charge density σ is reached.…”

Section: Resultssupporting

confidence: 93%

Rapid synthesis of pristine graphene inside a transmission electron microscope using gold as catalyst

et al. 2019

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Multiple methods with distinctive strengths and drawbacks have been devised so far to produce graphene. However, they all need post-synthesis transfer steps to characterize the product. Here we report the synthesis of pristine graphene inside the transmission electron microscope using gold as catalyst and self-removing substrate without employing a specialized specimen holder. The process occurs at room temperature and takes place within milliseconds. The method offers the possibility of precise spatial control for graphene production and immediate characterization. Briefly, the irradiating electrons generate secondary electrons leading to surface charging if the gold particles reside on a poorly conducting support. At a critical charge density, the particle ejects ions mixed with secondary electrons (plasma) causing the particle to shrink. Simultaneously, hydrocarbon contamination within the electron microscope is cracked, thus providing carbon for the growth of graphene on the particle's surface. The Technique is potentially attractive for the manufacture of in situ graphene-based devices.

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Section: Resultssupporting

confidence: 93%

Rapid synthesis of pristine graphene inside a transmission electron microscope using gold as catalyst

et al. 2019

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“…The new nanoscale structures interacting with electron beam has been primarily studied by transmission electron microscopy (TEM). In situ observation study of electron and matter interaction has been carried out in metals (Au, Pt, In, Ag, Mo, Bi, Ni and Li) 27 – 32 , metal oxides (Li 2 O, WO 3 , V 2 O 5 , Fe 3 O 4 ) 33 – 35 , semiconductors (Si, Ge, GaP, GaAs, CdS, InN, ZnS) 36 – 40 , carbon nanotube (CNT) 41 , 42 and ceramics (Pb-PST, BaTiO 3 , LaPO 4 , ScPO 4 ) 43 – 47 . The main purpose of this work is to address the question of the role of electron beam irradiation on the ABO 3 nanomaterial and its electronic structure modification.…”

Section: Introductionmentioning

confidence: 99%

Designing of metallic nanocrystals embedded in non-stoichiometric perovskite nanomaterial and its surface-electronic characteristics

Suriyaprakash

Zhu

et al. 2017

Sci Rep

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Engineering of novel functional nanocomposite as like as the metallic nanocrystals supported non-stoichiometric perovskite nanomaterial in controlled parameters (size, shape and ratio of chemical characteristics) is a challengeable task. In this context, we present a facile route to fabricate and study its physicochemical property at real time mode in this report. Nanoscale pure Pb crystals surfaced on non-stoichiometric A-site deficient Pb1-xTiO3-y nanoparticle were fabricated when a precursor lead titanate (PbTiO3) nanoparticle was exposed to an electron beam irradiation (EBI) in a transmission electron microscope (TEM) at ambient temperature. In the state of the art, the chemical states and electronic structure of non-irradiated and irradiated PbTiO3 were studied by X-ray photoelectron spectroscopy (XPS). Electron bombardment resulted in a new visible feature at low binding energy in the Pb 4f core level, while Ti 2p and O 1s line shape showed slight changes. The Fermi level of the corresponding materials was determined to be 1.65 ± 0.1 eV and 2.05 ± 0.1 eV above the valence band maximum, respectively. The normal, weakly p-type PTO exhibits peculiar n-type feature after EBI process (The Fermi level moves near to the conduction band). A feasible mechanism is proposed involving the electron-stimulated local bond-breaking phenomenon in PbTiO3.

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“…To date, most investigations of the optical properties of Ga NPs were performed on such hemispherical Ga NPs grown by MBE, such as coexistence of liquid and solid phases in substrate-supported Ga NPs [ 28 , 29 ], surface-enhanced Raman spectroscopy, fluorescence and photodegradation [ 30 , 31 ] and deep-subwavelength spectroscopic imaging [ 32 ]. Ga NPs can be obtained by using other fabrication methods, such as chemical synthesis [ 15 ], electron beam irradiation [ 33 ] and light-assisted deposition [ 20 , 29 ]. Unfortunately, a detailed investigation of the optical properties of Ga NPs with spherical shape is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Optical Scattering of Liquid Gallium Nanoparticles Coupled to Thin Metal Films

et al. 2020

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We investigate experimentally and numerically the scattering properties of liquid gallium nanoparticles coupled to a thin gold or silver film. The gallium nanoparticles are excited either directly by using inclined white light or indirectly by surface plasmon polaritons generated on the surface of the gold/silver film. In the former case, the scattering spectrum is always dominated by a scattering peak at ∼540 nm with a long-wavelength shoulder which is redshifted with increasing diameter of the gallium nanoparticle. Under the excitation of the surface plasmon polaritons, optical resonances with much narrower linewidths, which are dependent on the incidence angle of the white light, appear in the scattering spectra. In this case, the scattering spectrum depends weakly on the diameter of the gallium nanoparticle but the radiation pattern exhibits a strong dependence. In addition, a significant enhancement of electric field is expected in the gap region between the gallium nanoparticles and the gold film based on numerical simulation. As compared with the gallium nanoparticle coupled to the gold film which exhibit mainly yellow and orange colors, vivid scattering light spanning the visible light spectrum can be achieved in the gallium nanoparticles coupled to the silver film by simply varying the incidence angle. Gallium nanoparticles coupled to thin metal films may find potential applications in light–matter interaction and color display.

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Fabrication of nanoscale Ga balls via a Coulomb explosion of microscale silica-covered Ga balls by TEM electron-beam irradiation

Cited by 15 publications

References 33 publications

Rapid synthesis of pristine graphene inside a transmission electron microscope using gold as catalyst

Rapid synthesis of pristine graphene inside a transmission electron microscope using gold as catalyst

Designing of metallic nanocrystals embedded in non-stoichiometric perovskite nanomaterial and its surface-electronic characteristics

Optical Scattering of Liquid Gallium Nanoparticles Coupled to Thin Metal Films

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