Coordination Complexes as Precursors for Semiconductor Films and Nanoparticles

O’Brien, Paul; Pickett, Nigel L.

doi:10.1016/b0-08-043748-6/09005-8

Cited by 14 publications

(5 citation statements)

References 358 publications

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“…Many metal chalcogenide materials can be deposited via chemical vapor deposition (CVD) techniques, and this has stimulated a large amount of work on the development of tailored CVD precursors for their production. Compounds such as metal thiolates and selenolates have been shown to be useful reagents for single source CVD of metal sulfide and selenide thin films. ,− O’Brien and co-workers have developed single source precursors for CVD of metal sulfide and selenide films and nanoparticles based upon molecular dialkyldithiocarbamato and dialkyldiselenocarbamato complexes. ,− Parkin, Carmalt, and co-workers have also obtained metal selenide films via dual source atmospheric pressure CVD from SeEt 2 with volatile metal chlorides or amides . A small number of neutral selenoether (SeR 2 ) single source reagents for low pressure CVD of the layered metal selenide semiconductors TiSe 2 and SnSe 2 have also been reported. − We have shown in our recent work that the distorted octahedral [SnCl 4 { n BuSe(CH 2 ) n Se n Bu}] ( n = 2 or 3) complexes serve as single source LPCVD precursors for highly area selective deposition of single phase, crystalline SnSe 2 onto the conducting TiN regions within photolithographically patterned SiO 2 /TiN substrates …”

Section: Introductionmentioning

confidence: 99%

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

George¹,

Groot²,

Gurnani³

et al. 2013

Chem. Mater.

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The neutral complexes [GaCl 3 (E n Bu 2 )] (E = Se or Te), [(GaCl 3 ) 2 { n BuE(CH 2 ) n E n Bu}] (E = Se, n = 2; E = Te, n = 3), and [(GaCl 3 ) 2 { t BuTe(CH 2 ) 3 Te t Bu}] are conveniently prepared by reaction of GaCl 3 with the neutral E n Bu 2 in a 1:1 ratio or with n BuE(CH 2 ) n E n Bu or t BuTe(CH 2 ) 3 Te t Bu in a 2:1 ratio and characterized by IR/Raman and multinuclear ( 1 H, 71 Ga, 77 Se-{ 1 H}, and 125 Te{ 1 H}) NMR spectroscopy, respectively, all of which indicate distorted tetrahedral coordination at Ga. The tribromide analog, [GaBr 3 (Se n Bu 2 )], was prepared and characterized similarly. A crystal structure determination on [(GaCl 3 ) 2 { t BuTe(CH 2 ) 3 Te t Bu}] confirms this geometry with each pyramidal GaCl 3 fragment coordinated to one Te donor atom of the bridging ditelluroether, Ga−Te = 2.6356(13) and 2.6378(14) Å. The n Bu-substituted ligand complexes serve as convenient and very useful single source precursors for low pressure chemical vapor deposition (LPCVD) of single phase gallium telluride and gallium selenide, Ga 2 E 3 , films onto SiO 2 and TiN substrates. The composition and morphology were confirmed by SEM, EDX, and Raman spectroscopy, while XRD shows the films are crystalline, consistent with cubic Ga 2 Te 3 (F4̅ 3m) and monoclinic Ga 2 Se 3 (Cc), respectively. Hall measurements on films grown on SiO 2 show the Ga 2 Te 3 is a p-type semiconductor with a resistivity of 195 ± 10 Ω cm and a carrier density of 5 × 10 15 cm −3 , indicative of a close to stoichiometric compound. The Ga 2 Se 3 is also p-type with a resistivity of (9 ± 1) × 10 3 Ω cm, a carrier density of 2 × 10 13 cm −3 , and a mobility of 20−80 cm 2 / V·s. Competitive deposition of Ga 2 Te 3 onto a photolithographically patterned SiO 2 /TiN substrate indicates that film growth onto the conducting and more hydrophobic TiN is preferred.

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Section: Introductionmentioning

confidence: 99%

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

George¹,

Groot²,

Gurnani³

et al. 2013

Chem. Mater.

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“…Liu and co-workers have reported several selenium-centered clusters of Cu I , Ag I , and Zn II using dialkyl diselenophosphates (dsep) with nuclearities ranging from 4 to 11, which involve the rupture of the P−Se bond to generate such clusters . These clusters as well as their sulfur counterparts indeed possess potential in several technological applications and have drawn many biological interests …”

Section: Introductionmentioning

confidence: 99%

[Cu₄{Se₂P(OⁱPr)₂}₄]: A Novel Precursor Enabling Preparation of Nonstoichiometric Copper Selenide (Cu₂_-_xSe) Nanowires

Hsu¹,

Hung

Lin

et al. 2006

Chem. Mater.

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A newly synthesized, selenium-bridged copper cluster [Cu 4 {Se 2 P(O i Pr) 2 } 4 ] was employed in a singlesource chemical vapor deposition (SSCVD) process to produce single-crystalline nonstoichiometric Cu 2-x Se nanowires for the first time. This is the first discrete, chalcogen-bridged copper cluster being used successfully for the fabrication of 1D copper chalcogenide nanostructure. The crystalline structure and chemical composition of the resulting nanowires were examined and confirmed with X-ray diffraction, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectrometry analyses. Relevant characterizations revealed that a thin film of CuSe was first formed on the substrate surface due to the thermal decomposition of [Cu 4 {Se 2 P(O i Pr) 2 } 4 ]; subsequently, the Cu 2-x Se nanowires were grown on the CuSe thin film through a self-catalytic vapor-liquid-solid (VLS) growth mechanism with the Cu particles generated in-situ acting as the catalyst. The Cu 2-x Se nanowires were found to possess a direct band gap absorption at 558 nm and emit excitonic photoluminescence at 575 nm.

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“…QDs, as a modern type of nanomaterials, are used for optical image analysis. An example is nanocrystalline semiconductor materials, usually made of metallic materials such as zinc or cadmium from sulfides or selenides, which vary in diameter between 2 and 10 nanometers [221][222][223]. The wavelength ranges of the radiation generated do not depend on the QD components, but rather on the structural aspects of the QDs.…”

Section: Nanostructures As Carriers For Image Processingmentioning

confidence: 99%

Nanotechnology Advances in the Detection and Treatment of Cancer: An Overview

Mosleh-Shirazi¹,

Abbasi²,

Moaddeli³

et al. 2022

Nanotheranostics

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Over the last few years, progress has been made across the nanomedicine landscape, in particular, the invention of contemporary nanostructures for cancer diagnosis and overcoming complexities in the clinical treatment of cancerous tissues. Thanks to their small diameter and large surface-to-volume proportions, nanomaterials have special physicochemical properties that empower them to bind, absorb and transport high-efficiency substances, such as small molecular drugs, DNA, proteins, RNAs, and probes. They also have excellent durability, high carrier potential, the ability to integrate both hydrophobic and hydrophilic compounds, and compatibility with various transport routes, making them especially appealing over a wide range of oncology fields. This is also due to their configurable scale, structure, and surface properties. This review paper discusses how nanostructures can function as therapeutic vectors to enhance the therapeutic value of molecules; how nanomaterials can be used as medicinal products in gene therapy, photodynamics, and thermal treatment; and finally, the application of nanomaterials in the form of molecular imaging agents to diagnose and map tumor growth.

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Coordination Complexes as Precursors for Semiconductor Films and Nanoparticles

Cited by 14 publications

References 358 publications

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

[Cu₄{Se₂P(OⁱPr)₂}₄]: A Novel Precursor Enabling Preparation of Nonstoichiometric Copper Selenide (Cu₂_-_xSe) Nanowires

Nanotechnology Advances in the Detection and Treatment of Cancer: An Overview

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Coordination Complexes as Precursors for Semiconductor Films and Nanoparticles

Cited by 14 publications

References 358 publications

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga2Te3 and Ga2Se3 Thin Films

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga2Te3 and Ga2Se3 Thin Films

[Cu4{Se2P(OiPr)2}4]: A Novel Precursor Enabling Preparation of Nonstoichiometric Copper Selenide (Cu2-xSe) Nanowires

Nanotechnology Advances in the Detection and Treatment of Cancer: An Overview

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Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

Telluroether and Selenoether Complexes as Single Source Reagents for Low Pressure Chemical Vapor Deposition of Crystalline Ga₂Te₃ and Ga₂Se₃ Thin Films

[Cu₄{Se₂P(OⁱPr)₂}₄]: A Novel Precursor Enabling Preparation of Nonstoichiometric Copper Selenide (Cu₂_-_xSe) Nanowires