Measurement of cluster–cluster interaction in liquids by deposition and AFM of silicon clusters onto HOPG surfaces

Galinis, Gediminas; Torricelli, G.; Akraiam, Atea; Haeften, K. von

doi:10.1007/s11051-012-1057-4

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…However, measuring the differences between the tip-first cluster and tipsecond cluster layers was expected to give a fair estimate of the height of the clusters in the film. Values between 0.92 and 1.62 nm were found (Galinis et al, 2012a), in very good agreement with Belomoin and co-workers (Belomoin et al, 2000).…”

Section: Blue Fluorescencesupporting

confidence: 90%

Fluorescent silicon clusters and nanoparticles

von¹

2017

Silicon Nanomaterials Sourcebook

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Section: Blue Fluorescencesupporting

confidence: 90%

Fluorescent silicon clusters and nanoparticles

von¹

2017

Silicon Nanomaterials Sourcebook

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“…Hence, clear size shifts were evidenced by our measurements. A similar case was reported by Galinis et al for silicon nanoparticles produced in a liquid medium [38]. Two possible scenarios were proposed to explain the nanoparticle size deviation: particle-particle, particle-surface attractions and particle-tip, surface-tip attractions.…”

Section: Size Deviation Of Multilayer Nanoparticlessupporting

confidence: 76%

Size investigation of silicon nanoclusters deposited on HOPG using noncontact atomic force microscopy

Koç¹

2018

Turk J Phys

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The sizes of silicon nanoparticles produced using two different novel methods are investigated in this report. The method of production used to generate silicon oxide nanoparticles was achieved via gas aggregation codeposition with water on a cold target, and also via a liquid jet method. The nanoparticles were drop-cast on a highly oriented pyrolytic graphite (HOPG) substrate and assessed using ultrahigh vacuum atomic force microscopy (AFM). Noncontact constant force mode was used in the AFM investigations. The silicon nanoparticles produced using the gas aggregation and water codeposition method were found to be smaller than 2 nm. A degree of deviation in the measured sizes of the silicon nanoparticles in different layers was detected. The size deviation was attributed to surface-nanoparticle, surface-tip, and nanoparticle-tip interactions. Silicon nanoparticles produced in alcohol using the liquid jet method were also found to be smaller than 2 nm. The solvent used for the silicon nanoparticles was varied in our investigations. When water was used as a solvent, a size deviation for silicon nanoparticles in different layers was also observed.

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Towards biosensing via fluorescent surface sites of nanoparticles

et al. 2012

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The suitability of silicon nanoparticles of 1 nm in diameter for fluorescent sensing was investigated. Silicon nanoparticles were produced in a cluster beam and co-deposited with a beam of vapourised liquids (water, ethanol, isopropanol) onto a cold substrate. Melting of the frozen cluster-ice mixture yielded an aqueous suspension which emitted strong fluorescence in the deep blue spectral range when exposed to UV light. The fluorescence wavelength of the strongest peak was found to correlate with the dipole moment of the solvent molecules which allowed us to derive the transition energy for an isolated nanoparticle. The strong solvent sensitivity showed that the fluorescence originated from a surface state. A second fluorescence peak showed almost no sensitivity to different solvents, hence the peak was attributed to a transition within the bulk-volume of the nanoparticles. Our findings establish that silicon nanoparticles may serve as highly specific bio-sensors in living organism.

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Measurement of cluster–cluster interaction in liquids by deposition and AFM of silicon clusters onto HOPG surfaces

Cited by 6 publications

References 11 publications

Fluorescent silicon clusters and nanoparticles

Fluorescent silicon clusters and nanoparticles

Size investigation of silicon nanoclusters deposited on HOPG using noncontact atomic force microscopy

Towards biosensing via fluorescent surface sites of nanoparticles

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