Laser-derived one-pot synthesis of silicon nanocrystals terminated with organic monolayers

Shirahata, Naoto; Linford, Matthew R.; Furumi, Seiichi; Pei, Lei; Sakka, Yoshio; Gates, Richard J.; Asplund, Matthew C.

doi:10.1039/b905777c

Cited by 75 publications

(84 citation statements)

References 37 publications

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“…[36] The photoluminescence spectra shown in Figure 4 are in good agreement with previously published photoluminescence spectra for alkyl-functionalised silicon nanoparticles, which show a strong blue luminescence for small silicon nanoparticles of sizes up to 5 nm as synthesised by specific techniques. [37][38][39][40] It should be noted, however, that the origin of blue luminescence in functionalised silicon nanoparticles is still the subject of debate and is dependent upon the specific method of formation. In this study, the photoluminescence characteristics of the nanoparticles after the Williamson ether synthesis are influenced by the molecular structure of the attached functionality.…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

Williamson ether synthesis: an efficient one-step route for surface modifications of silicon nanoparticles

Hallmann

Fink

Mitchell

2013

Journal of Experimental Nanoscience

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A new synthetic route to mechanochemically produce silicon nanoparticles modified with biocompatible and chromophoric molecular compounds using the Williamson ether synthesis is described. This reaction allows a direct grafting of organic compounds such as phenol, hydroquinone and tetraethylene glycol to the silicon nanoparticle surface in an efficient fashion. Specifically, the formation of (phenoxy) hexyl silicon, (tetraethyleneglycoxy) hexyl silicon and (p-hydroxyphenoxy) hexyl silicon nanoparticles using the Williamson ether synthesis on chloroalkyl-terminated silicon nanoparticle is described. The resulting physical properties of the individual functionalised silicon nanoparticles were characterised by transmission electron microscopy, energy dispersive spectroscopy and photoluminescence, ultraviolet-visible, nuclear magnetic resonance and Fourier transformed infrared spectroscopies. The spectroscopic results show a direct bonding of the biocompatible and chromophoric molecules to the nanoparticles. Photoluminescence results show that the modified nanoparticles exhibit fluorescence in the blue spectral regions, consistent with other functionalised silicon nanoparticles formed by mechanochemistry, but that phenol and hydroquinone moieties result in silicon nanoparticles with broad, overlapping luminescence peaks, while the functionalisation with tetraethylene glycol has little effect on the overall optical properties.

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Section: Photoluminescence Studiesmentioning

confidence: 99%

Williamson ether synthesis: an efficient one-step route for surface modifications of silicon nanoparticles

Hallmann

Fink

Mitchell

2013

Journal of Experimental Nanoscience

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“…Such automatic reaction gives the non-oxidized silicon nanoparticles due to high molecular packing density on their surfaces. 15 Accordingly, a nanoparticle suspension is obtained. After removal of unreacted molecules by rotary evaporation, the resultant product uniformly redisperses in CH 2 Cl 2 .…”

Section: Transactions Of the Materials Research Society Of Japanmentioning

confidence: 99%

“…The covalent attachment of the mono layers to the surface of silicon is observable using NMR and FTIR. 15 Optical absorption and photoluminescence (PL) measurements were performed on the nanocrystal sample suspended in dichloromethane, and are presented in Fig. 4.…”

Section: Transactions Of the Materials Research Society Of Japanmentioning

confidence: 99%

Organometallic Chemistry on IV Semiconductors and Potential Applications

Shirahata

2012

Trans. Mat. Res. Soc. Japan

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This review paper describes some of our recent topics on surface functionalization of IV semiconductors. Well-designed surfaces of the semiconductors create exciting opportunities for technological applications. To meet such exciting functionality, we use a monolayer system in which the reactive monolayer attaches to the semiconductor surface via covalent linkage. Most importantly, this molecular system enables chemists to manipulate the non-oxidized surfaces of the semiconductors even under ambient conditions. A variety of organic approaches is available to modify the surface chemical property in a lab environment without surrounding environmental control using glove box. The covalent attachment of organic mono layers leads to the appearance of unique property. For example, (i) The surface organic passivation leads to the highly efficient luminescence from silicon nanoparticles. Interestingly, the monomolecular density can controls the optical transition process of photoexcited careers in the nanostructured silicon. (ii) A multifunctional microarray, in which different types of self-assembled monolayers (SAMs) are respectively positioned on predefined surface sites, allows the parallel detection of different bimolecular interactions under the same buffer condition. (iii) The successful formation of reactive moieties on the IV semiconductors has provided unique chemical template for subsequent biomolecular attachment. The industrial use of IV semiconductors provides the unsurpassed compatibility with microelectronics. Furthermore, these semiconductors with a high chemical affinity for carbon, oxygen, and nitrogen have a potential to produce a variety of its organic derivatives hybridized at the molecular leveL

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“…The covalent attachment of the monolayers to the surface of silicon is observable using NMR and FTIR. 15 Optical absorption and photoluminescence (PL) measurements were performed on the nanocrystal sample suspended in dichloromethane, and are presented in Fig. 4.…”

Section: Nanoparticle Chemistrymentioning

confidence: 99%

“…15 A hydrogen-terminated silicon substrate was placed in a quartz cell filled with 1-alkene, and it was then ablated with Nd:YAG pulsed laser as illustrated in Figure 10. The focused laser beam irradiation produces vapors of silicon.…”

Section: Nanoparticle Chemistrymentioning

confidence: 99%

Organometallic Chemistry on IV Semiconductors and Potential Applications

Shirahata

2010

Trans. Mat. Res. Soc. Japan

Self Cite

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This review paper describes some of our recent topics on surface functionalization of IV semiconductors. Well-designed surfaces of the semiconductors create exciting opportunities for technological applications. To meet such exciting functionality, we use a monolayer system in which the reactive monolayer attaches to the semiconductor surface via covalent linkage. Most importantly, this molecular system enables chemists to manipulate the non-oxidized surfaces of the semiconductors even under ambient conditions. A variety of organic approaches is available to modify the surface chemical property in a lab environment without surrounding environmental control using glove box. The covalent attachment of organic monolayers leads to the appearance of unique property. For example, (i) The surface organic passivation leads to the highly efficient luminescence from silicon nanoparticles. Interestingly, the monomolecular density can controls the optical transition process of photoexcited careers in the nanostructured silicon. (ii) A multifunctional microarray, in which different types of self-assembled monolayers (SAMs) are respectively positioned on predefined surface sites, allows the parallel detection of different bimolecular interactions under the same buffer condition. (iii) The successful formation of reactive moieties on the IV semiconductors has provided unique chemical template for subsequent biomolecular attachment. The industrial use of IV semiconductors provides the unsurpassed compatibility with microelectronics. Furthermore, these semiconductors with a high chemical affinity for carbon, oxygen, and nitrogen have a potential to produce a variety of its organic derivatives hybridized at the molecular level.

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Laser-derived one-pot synthesis of silicon nanocrystals terminated with organic monolayers

Cited by 75 publications

References 37 publications

Williamson ether synthesis: an efficient one-step route for surface modifications of silicon nanoparticles

Williamson ether synthesis: an efficient one-step route for surface modifications of silicon nanoparticles

Organometallic Chemistry on IV Semiconductors and Potential Applications

Organometallic Chemistry on IV Semiconductors and Potential Applications

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