Formation of structures from amorphous metallic nanoparticles by dispersing metal drops continuously charging in an electron beam

Gorokhov, M. V.; Kozhevin, V. M.; Yavsin, D. A.; Ankudinov, A. V.; Ситникова, A. А.; Gurevich, S. A.

doi:10.1134/s1063784212060114

Cited by 5 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phase state and structure of the nanoparticles are associated with the phase transformations and dif fusion processes, which occur during cooling of liquid nanodroplets of the Ni-C alloy on the substrate surface. They depend on the intensity of the optical radiation flux and on the rate of cooling of nanoparticles [13,17]. This can be responsible for different morphologies of the nanostructures shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…The metal (Ni) and composite (Ni-C) nanostruc tures were grown by electron beam evaporation in vac uum at a residual pressure of ~10 -4 Pa from a liquid ion source [13]. For the growth of the Ni-C nanocompos ite material, nickel and carbon powders were mixed at a ratio of 1 : 1 and placed in a graphite electrode that served as the anode to which a positive voltage of 1000-3500 V was applied.…”

Section: Sample Preparation and Experimental Techniquementioning

confidence: 99%

“…Metal nanoparticles and carbon structures can be grown using vacuum deposition of the material from a liquid metal ion source in an electric field, which makes it possible to obtain ion beams of refractory metals and carbon [12]. This technology can provide growth of arrays of nanoparticles with a narrow dispersion of geometrical sizes [13] by means of the transfer of liq uid droplets of the material onto a layered GaSe sub strate. To avoid thermal etching of the van der Waals surface, the temperature of this substrate should not exceed 300°C [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphology, chemical composition, and electrical characteristics of hybrid (Ni-C) nanocomposite structures grown on the van der Waals GaSe(0001) surface

et al. 2014

View full text Add to dashboard Cite

The morphology and chemical composition of metal (Ni), carbon, and composite (Ni-C) nano structures grown on oxidized and unoxidized (0001) surfaces of a layered GaSe crystal by electron beam vac uum evaporation of the material from a liquid ion source in an electric field have been investigated using atomic force microscopy and X ray photoelectron spectroscopy. It has been demonstrated that this technol ogy makes it possible to grow nanostructures with different morphologies depending on the growth mode and substrate surface state. Dense homogeneous arrays of nickel nanoparticles (Ni@C) (with geometrical sizes of 1-15 nm and a lateral density of higher than 10 10 cm -2 ) encapsulated into carbon shells, as well as carbon layers (with a thickness of the order of several nanometers), are grown on the unoxidized van der Waals GaSe(0001) surface, whereas Ni-C composite nanostructures are grown on the oxidized surface. The for mation of oxide nanostructures on the van der Waals surface and their chemical composition have been exam ined. Vertical hybrid Au/Ni/(Ni-C)/n Ga 2 O 3 (Ni@C)/p GaSe structures grown on the GaSe(0001) surface contain Ni@C nanoparticles embedded in the wide band gap n Ga 2 O 3 oxide. The current-voltage charac teristics of these structures at temperatures close to T = 300 K exhibit specific features of the Coulomb block ade effect.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Sample Preparation and Experimental Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Morphology, chemical composition, and electrical characteristics of hybrid (Ni-C) nanocomposite structures grown on the van der Waals GaSe(0001) surface

et al. 2014

View full text Add to dashboard Cite

show abstract

“…[14][15][16] Formation of intrinsically disordered self-assembled nanostructures has also gained interest due to the resonant properties of disordered media. [17][18][19] To fabricate separated nanoparticles, chemical 20 or, more recently, laser ablation and other techniques 21,22 are in use. Also, different sputtering techniques combined with thermal annealing are standard in manufacturing metal island lms (MIFs) 23,24 that are ensembles of metal nanoislands, i.e.…”

Section: Introductionmentioning

confidence: 99%

2D-patterning of self-assembled silver nanoisland films

et al. 2016

View full text Add to dashboard Cite

The paper is dedicated to the recently developed by the authors technique of silver nanoisland growth, allowing self-arrangement of 2D-patterns of nanoislands. The technique employs silver out-diffusion from ion-exchanged glass in the course of annealing in hydrogen. To modify the silver ion distribution in the exchanged soda-lime glass we included the thermal poling of the ion-exchanged glass with a profiled electrode as an intermediate stage of the process. The resulting consequence consists of three steps: (i) during the ion exchange of the glass in the AgxNa1-xNO3 (x = 0.01-0.15) melt we enrich the subsurface layer of the glass with silver ions; (ii) under the thermal poling, the electric field displaces these ions deeper into the glass under the 2D profiled anodic electrode, the displacement is smaller under the hollows in the electrode where the intensity of the field is minimal; (iii) annealing in a reducing atmosphere of hydrogen results in silver out-diffusion only in the regions corresponding to the electrode hollows, as a result silver forms nanoislands following the shape of the electrode. Varying the electrode and mode of processing allows governing the nanoisland size distribution and self-arrangement of the isolated single nanoislands, pairs, triples or groups of several nanoislands-so-called plasmonic molecules.

show abstract