UV luminescent organic-capped ZnO quantum dots synthesized by alkoxide hydrolysis with dilute water

Omata, Takahisa; Takahashi, Kazuyuki; Hashimoto, Shinichi; Maeda, Yasuhiro; Nose, Katsuhiro; Otsuka‐Yao‐Matsuo, Shinya; Kanaori, Kenji

doi:10.1016/j.jcis.2010.12.014

Cited by 20 publications

(22 citation statements)

References 26 publications

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“…LiOH (99.995%), Ga(OiPr) 3 (99.9%), BZA (99.5%), oleylamine (OLA, 70%), and n-octylamine (OCA, 98%) were acquired from commercial sources. The OLA was purified by distillation before use, while all other chemicals were used without further purification.…”

Section: Chemicalsmentioning

confidence: 99%

“…Prior to studying the reaction between LiOH and Ga(OiPr) 3 , we explored organic solvent that dissolves both LiOH and Ga(OiPr) 3 and found that BZA is a suitable solvent. We first dissolved 0.030.2 mmol of LiOH and 0.1 mmol of Ga(OiPr) 3 in 3 mL of BZA.…”

Section: Reaction Between Lioh and Ga(oipr)mentioning

confidence: 99%

“…We first dissolved 0.030.2 mmol of LiOH and 0.1 mmol of Ga(OiPr) 3 in 3 mL of BZA. After mixing both the lithium-and gallium-source solutions in a glass vial, we held it at room temperature to study the reactivity between LiOH and Ga(OiPr) 3 .…”

Section: Reaction Between Lioh and Ga(oipr)mentioning

confidence: 99%

“…ZnO is one of the materials applicable to UV-light emitting devices because of its wide energy band gap of 3.37 eV; 2) however, size-dependent and high-intensity UV emission of colloidal ZnO NCs has not yet been demonstrated. 3) According to studies on colloidal CdSe NCs, fabrication of core/shell nanostructure significantly improve their emission intensity because of passivation of surface states, i.e., photoluminescence quantum yield exceeding 80% has been demonstrated for CdSe/ZnSe core/shell NCs. 4) For the case of ZnO NCs, ¢-LiGaO 2 with a wurtzitederived structure has been proposed as a suitable shell material that improves UV emission intensity of ZnO NCs.…”

Section: Introductionmentioning

confidence: 99%

“…To fabricate ZnO/¢-LiGaO 2 core/shell NCs, developing a synthesis route to colloidal ¢-LiGaO 2 NCs that does not form corrosive byproduct to ZnO, such as alkyl halides, 5) and achieves stoichiometric composition is extremely important. For this purpose we studied the synthesis of colloidal ¢-LiGaO 2 NCs capped with organic amines using a reaction between LiOH and Ga(OiPr) 3 in benzylalcohol (BZA), because the byproduct of this reaction is expected to be 2-propanol that is not corrosive to ZnO based on the mechanism of previous alkyl halide elimination reaction.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of colloidal solution of β-LiGaO<sub>2</sub> nanocrystals capped with organic surfactant

Takahashi

Maeda

Suehiro

et al. 2014

J. Ceram. Soc. Japan

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We studied a means of synthesizing colloidal nanocrystals (NCs) of ¢-LiGaO 2 , a wide-band gap semiconductor oxide, by reacting lithium hydroxide (LiOH) with gallium tri-iso-propoxide [Ga(OiPr) 3 ] in benzylamine. This reaction yielded near-stoichiometric ¢-LiGaO 2 NCs, 45 nm in diameter and capped with n-octylamine, which were highly dispersible in an organic solvent. We proposed that the LiOH and Ga(OiPr) 3 reacted via electrophilic attack of Li + on the bridging oxygen of Ga(OiPr) 3 and/or nucleophilic attack of OH ¹ on the ¡-carbon of Ga(OiPr) 3 . This reaction formed LiOGa bonds and contributed to the nearstoichiometry of the resultant ¢-LiGaO 2 NCs.

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Section: Chemicalsmentioning

confidence: 99%

Section: Reaction Between Lioh and Ga(oipr)mentioning

confidence: 99%

Section: Reaction Between Lioh and Ga(oipr)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of colloidal solution of β-LiGaO<sub>2</sub> nanocrystals capped with organic surfactant

Takahashi

Maeda

Suehiro

et al. 2014

J. Ceram. Soc. Japan

Self Cite

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Construction of Nanostructures: A Basic Concept Synthesis and their Applications

Wahab

Khan

Kaushik

et al. 2014

Advanced Sensor and Detection Materials

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Highly Luminescent ZnO Quantum Dots Made in a Nonthermal Plasma

Felbier

Yang

Theis

et al. 2013

Adv Funct Materials

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Nonthermal plasmas allow the preparation of ligand‐free quantum dots combining high production rates with superior crystalline quality and luminescence properties. Here, ZnO quantum dots are produced in a radiofrequency capacitively‐coupled plasma, exhibiting size dependent photoluminescent quantum yields up to 60% after air exposure—the highest reported to date for any compound semiconductor quantum dots prepared in the gas phase. Systematic studies indicate the importance of the surface for the observed luminescence behavior. The high luminescent quantum yields in the visible range of the spectrum and the ligand‐free, scalable synthesis make these quantum dots good candidates for light emitting applications.

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UV luminescent organic-capped ZnO quantum dots synthesized by alkoxide hydrolysis with dilute water

Cited by 20 publications

References 26 publications

Synthesis of colloidal solution of β-LiGaO<sub>2</sub> nanocrystals capped with organic surfactant

Synthesis of colloidal solution of β-LiGaO<sub>2</sub> nanocrystals capped with organic surfactant

Construction of Nanostructures: A Basic Concept Synthesis and their Applications

Highly Luminescent ZnO Quantum Dots Made in a Nonthermal Plasma

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