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Volumn 18, Issue 18, 2008, Pages 2763-2769

Bulk synthesis and surface patterning of nanoporous metals and alloys from supraspherical nanoparticle aggregates

Author keywords

[No Author keywords available]

Indexed keywords

AGGLOMERATION; ELECTRON BEAMS; HEATING; METALLIC COMPOUNDS; METALLURGY; METALS; NANOPARTICLES; NANOSTRUCTURED MATERIALS; NANOSTRUCTURES; NUCLEAR PROPULSION; SURFACE ROUGHNESS;

EID: 53849108832     PISSN: 1616301X     EISSN: 16163028     Source Type: Journal    
DOI: 10.1002/adfm.200800293     Document Type: Article
Times cited : (43)

References (36)
  • 20
    • 53849146912 scopus 로고    scopus 로고
    • We have previously shown that suprasphere growth can be approximated by a nucleation-and-growth mechanism (see Ref. 18) and the average number of NPs per SS, 〈N〉 is proportional to the ratio of CNP and the equilibrium concentration of critical nuclei, CNuc. From basic nucleation theory, the concentration of critical nuclei CNuc is proportional to the number of nucleation sites per unit area, which here is proportional to the fractional surface coverage. θ, of DT ligands on NP surfaces. It follows that 〈N〉 ∼ CNP/θ. Furthermore, since θ is approximately constant for constant C NP/CDT, the size of the aggregates is expected to increase monotonically with CNP in qualitative agreement with experimental observations in Figure 1b
    • NP in qualitative agreement with experimental observations in Figure 1b.
  • 25
    • 53849141669 scopus 로고    scopus 로고
    • Similar temperatures have reported for other noble metals, e.g, thiols desorb from silver at 110°C (see Ref. 26).
    • Similar temperatures have reported for other noble metals, e.g, thiols desorb from silver at 110°C (see Ref. 26).
  • 28
    • 53849109775 scopus 로고    scopus 로고
    • From the point of thermodynamics, the foams generated at constant temperature, 110°C reflux can be classified as a local free energy minimum. The global minimum corresponding to the bulk gold is not kinetically accessible.
    • From the point of thermodynamics, the foams generated at constant temperature, 110°C reflux can be classified as a local free energy minimum. The global minimum corresponding to the bulk gold is not kinetically accessible.
  • 32
    • 53849141998 scopus 로고    scopus 로고
    • Other surfaces we studies included silica, glass, PDMS and mica - in these cases, we observed the formation of bands (cf. Ref. 17) as opposed to uniform films of SS.
    • Other surfaces we studies included silica, glass, PDMS and mica - in these cases, we observed the formation of bands (cf. Ref. 17) as opposed to uniform films of SS.
  • 33
    • 53849146568 scopus 로고    scopus 로고
    • -2 at 10kV) was sufficient to crosslink - but not fully melt - the nearby SS. In such case, the structures could be processed into nanoporous metals by (i) washing off the unirradiated regions in alkanethiol/toluene solution and (ii) heating the patterned substrates in toluene at 110°C.
    • -2 at 10kV) was sufficient to crosslink - but not fully "melt" - the nearby SS. In such case, the structures could be processed into nanoporous metals by (i) washing off the unirradiated regions in alkanethiol/toluene solution and (ii) heating the patterned substrates in toluene at 110°C.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.