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Volumn 8, Issue 1, 2008, Pages 260-264

Two-dimensional photonic crystal resist membrane nanocavity embedding colloidal dot-in-a-rod nanocrystals

Author keywords

[No Author keywords available]

Indexed keywords

COLLOIDS; ELECTRONIC STRUCTURE; LITHOGRAPHY; PHOTOLUMINESCENCE SPECTROSCOPY; PHOTONIC CRYSTALS; SUBSTRATES;

EID: 38749112128     PISSN: 15306984     EISSN: None     Source Type: Journal    
DOI: 10.1021/nl0725751     Document Type: Article
Times cited : (36)

References (33)
  • 25
    • 38749103682 scopus 로고    scopus 로고
    • The seeded growth approach allows to grow core/shell nanorod structures at high temperatures (>350 °C), and this leads to highly monodisperse elongated structures with few crystallographic defects. The elongated shell strongly increases the absorption cross-section of the nanocrystals in the blue - UV region with respect to the absorption of spherical core-shell nanocrystals with comparable quantum yield, and therefore a brighter emission is expected. The Stokes shift between the first excitonic peak and the DR-NC emission peak (the latter centered at ∼600 nm with a full-width-at-half-maximum (FWHM) of 24 nm) is only slightly affected by the rod length, therefore confirming that the radiative recombination process is mainly localized in the core (i.e., seed) region.
    • The seeded growth approach allows to grow core/shell nanorod structures at high temperatures (>350 °C), and this leads to highly monodisperse elongated structures with few crystallographic defects. The elongated shell strongly increases the absorption cross-section of the nanocrystals in the blue - UV region with respect to the absorption of spherical core-shell nanocrystals with comparable quantum yield, and therefore a brighter emission is expected. The Stokes shift between the first excitonic peak and the DR-NC emission peak (the latter centered at ∼600 nm with a full-width-at-half-maximum (FWHM) of 24 nm) is only slightly affected by the rod length, therefore confirming that the radiative recombination process is mainly localized in the core (i.e., seed) region.
  • 30
    • 38749118796 scopus 로고    scopus 로고
    • This low Q value is limited by large losses in both out-of-plane and in-plane directions because photonic band-gap exists in only relatively high frequency regions and it is at best very narrow
    • This low Q value is limited by large losses in both out-of-plane and in-plane directions because photonic band-gap exists in only relatively high frequency regions and it is at best very narrow.
  • 32
    • 38749087397 scopus 로고    scopus 로고
    • The electron beam lithography process was carried out on a JEOL JBX-6000 lithography system (acceleration voltage = 50 KV, beam current = 120 pA), with modulated dose along the pattern in order to compensate the proximity effect between neighboring holes. The sample was then developed in ZED-N50 solvent and rinsed in ZMD-B (both from ZEON Corporation).
    • The electron beam lithography process was carried out on a JEOL JBX-6000 lithography system (acceleration voltage = 50 KV, beam current = 120 pA), with modulated dose along the pattern in order to compensate the proximity effect between neighboring holes. The sample was then developed in ZED-N50 solvent and rinsed in ZMD-B (both from ZEON Corporation).
  • 33
    • 38749099993 scopus 로고    scopus 로고
    • Slight deviations (in the range of the resolution limit of the lithographic process) of the fabricated inner holes radii from the expected values can explain the reduction of the experimental Q-factor from the simulated one. Further improvements in the control of the lithographic exposure parameters will predictably lead to a better match between theoretical and experimental performances
    • Slight deviations (in the range of the resolution limit of the lithographic process) of the fabricated inner holes radii from the expected values can explain the reduction of the experimental Q-factor from the simulated one. Further improvements in the control of the lithographic exposure parameters will predictably lead to a better match between theoretical and experimental performances.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.