Preparation and photoluminescence properties of amorphous silica nanowires

Wu, Xingcai; Song, Wooseok; Wang, K.Y.; Hu, Tao; Zhao, Boyang; Sun, Yanbin; Du, Juan

doi:10.1016/s0009-2614(01)00063-x

Cited by 166 publications

(63 citation statements)

References 17 publications

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“…Similarly, Wu et al (2001) reported that a stable and strong blue emission was found at 2.85 eV (435 nm) at room temperature under excitation at 260 nm while ultraviolet and blue light emission at 3.54 eV (350 nm), 3.0 eV (420 nm) and 2.7 eV (465 nm) could also be observed ( Figure 2). The different values of energy bands had been attributed to certain phenomenon.…”

Section: Optical Properties Of Sio X Nanowiresmentioning

confidence: 60%

Advances of SiOx and Si/SiOx Core-Shell Nanowires

Cheong¹,

Chiew²

2010

Nanowires Science and Technology

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Section: Optical Properties Of Sio X Nanowiresmentioning

confidence: 60%

Advances of SiOx and Si/SiOx Core-Shell Nanowires

Cheong¹,

Chiew²

2010

Nanowires Science and Technology

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“…The blue luminescence from various silica structures has been reported [15][16][17] . In many cases, the blue luminescence of silica nanowires has been obtained by accident [18][19][20] .…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence Characteristics of the Light-Emitting Chromophores Obtained from Organic-Inorganic Hybrid Silica Spheres

Park¹,

Jeong²,

Kang³

2016

Current Photovoltaic Research

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Light-emitting chromophores have been separated from silica spheres modified the surface with 3-(trimethoxysilyl)propylmethacrylate (TMSPM). The photoluminescence characteristics of the chromophores were investigated with various excitation wavelengths. The TMSPM was attached to the surface of silica spheres at 75°C. Large number of round shaped particles of the TMSPM was on the surface of silica spheres after 3 h reaction. The TMPSM was completely covered on the surface of the spheres after 6 h reaction. The surface modified silica spheres were soaked into acetone and stored for 20 days at ambient condition. The solution color slowly changed from light yellow to deep yellow with the increase of the storing time. The FTIR absorption peaks at 3348, 2869, 2927, 1715, 1453/1377, 1296, and 1120 cm -1 represent C-OH, R-CH3, R2-CH2, -C=O, C-H, C=C-H, and Si-O-Si absorption, respectively. The FTIR absorption peak at 1715 cm -1 representing the ester -C=O stretching vibration for silica spheres stored for 20 days was increased compared with the spheres without aging. The UV-visible absorption peaks were at 4.51 eV (275 nm) and 3.91 eV (317 nm). There were two luminescence peaks at 2.51 eV (495 nm) and 2.25 eV (550 nm). The emission at 2.51 eV was dominant peak when the excitation energy was higher than 2.58 eV, and emission at 2.25 eV became dominant peak when the excitation energy was lower than 2.58 eV.

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“…One-dimensional SiO x nanowires have recently attracted considerable research attention due to their unique properties and promising applications [1][2][3][4][5][6][7][8][9][10][11][12][13]. The stable and bright blue emission of SiO x nanowires makes them potential sources of high-intensity light, near-field optical microscope probes and waveguides.…”

Section: Introductionmentioning

confidence: 99%

“…The stable and bright blue emission of SiO x nanowires makes them potential sources of high-intensity light, near-field optical microscope probes and waveguides. Many studies prefer to use Au [1][2][3] as a catalyst for SiO x nanowires growth, some of the studies have used Fe [4][5][6], Co [7,8], Ni [9], Ge [10][11][12] and other metal alloys [13]. Generally, an Au catalyst is preferred because of its low eutectic temperature with silicon (T≈363°C) and its effects on the shape and the diameter of the grown wires [14].…”

Section: Introductionmentioning

confidence: 99%

Direct Growth and Photoluminescence of SiOx Nanowires and Aligned Nanocakes by Simple Carbothermal Evaporation

Al-Ruqeishi

Nor

Amin

et al. 2011

Silicon

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The growth of SiO x nanowires and nanocakes on an Au-coated n-type-Silicon (100) substrate was achieved via carbothermal evaporation. The effects of the Au layer thickness and the rapid heating rate on the morphology of obtained SiO x nanowires were investigated. A broad emission band from 290 to 600 nm was observed in the photoluminescence (PL) spectrum of these nanowires. There are four PL peaks: one blue emission peak 485 nm (2.56 eV) two green bands centered at 502 nm (2.47 eV) and 524 nm (2.37 eV) for nanocakes and one ultraviolet emission peak at 350 nm (3.54 eV) and a hemisphere curve over the bluish green area taken for SiO x nanowires. These emissions may be related to the various oxygen defects and twofold coordinated silicon lone pair centers.

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Preparation and photoluminescence properties of amorphous silica nanowires

Cited by 166 publications

References 17 publications

Advances of SiOx and Si/SiOx Core-Shell Nanowires

Advances of SiOx and Si/SiOx Core-Shell Nanowires

Photoluminescence Characteristics of the Light-Emitting Chromophores Obtained from Organic-Inorganic Hybrid Silica Spheres

Direct Growth and Photoluminescence of SiOx Nanowires and Aligned Nanocakes by Simple Carbothermal Evaporation

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