Noble gas ion beams in materials science for future applications and devices

Belianinov, Alex; Burch, Matthew J.; Kim, Songkil; Tan, Sheng; Hlawacek, Gregor; Ovchinnikova, Olga S.

doi:10.1557/mrs.2017.185

Cited by 25 publications

(22 citation statements)

References 39 publications

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“…HIM‐SIMS was a relatively new technique that combined the high‐resolution imaging of the HIM with the chemical sensitivity of SIMS. [ 114,115 ] The HIM is a gas field ion source based focused ion beam capable of operating with helium and neon gas, and offering beam spot sizes of 0.5 and 2 nm, respectively. The SIMS add‐on unit allows detection of the ion distribution with a spatial resolution of ≈15 nm.…”

Section: Methodsmentioning

confidence: 99%

Non‐Equilibrium Synthesis of Highly Active Nanostructured, Oxygen‐Incorporated Amorphous Molybdenum Sulfide HER Electrocatalyst

Giuffredi

Mezzetti

Perego

et al. 2020

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Molybdenum sulfide emerged as promising hydrogen evolution reaction (HER) electrocatalyst thanks to its high intrinsic activity, however its limited active sites exposure and low conductivity hamper its performance. To address these drawbacks, the non‐equilibrium nature of pulsed laser deposition (PLD) is exploited to synthesize self‐supported hierarchical nanoarchitectures by gas phase nucleation and sequential attachment of defective molybdenum sulfide clusters. The physics of the process are studied by in situ diagnostics and correlated to the properties of the resulting electrocatalyst. The as‐synthesized architectures have a disordered nanocrystalline structure, with nanodomains of bent, defective S‐Mo‐S layers embedded in an amorphous matrix, with excess sulfur and segregated molybdenum particles. Oxygen incorporation in this structure fosters the creation of amorphous oxide/oxysulfide nanophases with high electrical conductivity, enabling fast electron transfer to the active sites. The combined effect of the nanocrystalline pristine structure and the surface oxidation enhances the performance leading to small overpotentials, very fast kinetics (35.1 mV dec−1 Tafel slope) and remarkable long‐term stability for continuous operation up to ‐1 A cm−2. This work shows possible new avenues in catalytic design arising from a non‐equilibrium technique as PLD and the importance of structural and chemical control to improve the HER performance of MoS‐based catalysts.

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Section: Methodsmentioning

confidence: 99%

Non‐Equilibrium Synthesis of Highly Active Nanostructured, Oxygen‐Incorporated Amorphous Molybdenum Sulfide HER Electrocatalyst

Giuffredi

Mezzetti

Perego

et al. 2020

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“…A helium ion microscope (Zeiss Orion Nanofab) was utilized for the secondary electron imaging of specimens. Helium ion microscopy (HIM), enabled by a gas field ion source (GFIS), is a powerful imaging and nanofabrication technique compatible with many applications in materials science [30][31][32] . HIM offers small interaction volume of He and Ne (the two gases offered), small beam spot size, and a moderate sputtering rate 33,34 .…”

Section: Helium Ion Microscopy (Him)mentioning

confidence: 99%

Advanced characterization of surface-modified nanoparticles and nanofilled antibacterial dental adhesive resins

Florez

Trofimov

Ievlev

et al. 2020

Sci Rep

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Nanotechnology can improve the performance of dental polymers. The objective of this study was to modify the surfaces of nanoparticles with silanes and proteins, characterize nanoparticles' agglomeration levels and interfaces between nanoparticles and the polymeric matrix. Undoped (ntio 2), nitrogen-doped (N_TiO 2) and nitrogen-fluorine co-doped titanium dioxide nanoparticles (NF_ tio 2) were synthesized and subjected to surface modification procedures in preparation for Small-Angle X-Ray Scattering (SAXS) and Small-Angle Neutron Scattering (SANS) characterizations. Experimental adhesives were manually synthesized by incorporating 20% (v/v) of n-TiO 2 , N_TiO 2 or NF_TiO 2 (assynthesized or surface-modified) into OptiBond Solo Plus (OPTB). Specimens (n = 15/group; d = 6.0 mm, t = 0.5 mm) of OPTB and experimental adhesives were characterized using Time-of-Flight Secondary Ion Mass Spectroscopy (ToF-SIMS), 2-D ToF-SIMS chemical imaging and SANS. SAXS results indicated that surface-modified nanoparticles displayed higher scattering intensities in a particle-size dependent manner. ToF-SIMS results demonstrated that nanoparticles' incorporation did not adversely impact the parental polymer. 2-D ToF-SIMS chemical imaging demonstrated the distribution of Ti + and confirmed nitrogen-doping levels. SANS results confirmed nanoparticles' functionalization and revealed the interfaces between nanoparticles and the polymer matrix. Metaloxide nanoparticles were successfully fabricated, incorporated and covalently functionalized in a commercial dental adhesive resin, thereby supporting the utilization of nanotechnology in dentistry.

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“…In their article, Zhao et al 84 report on e-beaminduced modifications in the atomic structure of two-dimensional materials such as graphene and layered chalcogenides, including creation of single vacancies and defect clusters, beam-induced phase transitions, and single-atom motion. In their article, Belianinov et al 85 report on ion-beam-based matter fabrication, advances enabled by rapidly emerging He and other ion microscopies. Finally, Jiang et al 86 report on the applications of electron beams in inducing local structural changes in 3D solids, including amorphization-crystallization and phase transitions.…”

Section: In This Issuementioning

confidence: 99%

Single-atom fabrication with electron and ion beams: From surfaces and two-dimensional materials toward three-dimensional atom-by-atom assembly

Kalinin

Pennycook

2017

MRS Bull.

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Noble gas ion beams in materials science for future applications and devices

Abstract: Abstract

Cited by 25 publications

References 39 publications

Non‐Equilibrium Synthesis of Highly Active Nanostructured, Oxygen‐Incorporated Amorphous Molybdenum Sulfide HER Electrocatalyst

Non‐Equilibrium Synthesis of Highly Active Nanostructured, Oxygen‐Incorporated Amorphous Molybdenum Sulfide HER Electrocatalyst

Advanced characterization of surface-modified nanoparticles and nanofilled antibacterial dental adhesive resins

Single-atom fabrication with electron and ion beams: From surfaces and two-dimensional materials toward three-dimensional atom-by-atom assembly

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