Immobilization of Apoferritin‐Templated Seeds for Si Nanowire Growth

Zhang, Zhang; Zhang, Lianbing; Senz, Stephan; Knez, Mato

doi:10.1002/cvde.201006896

Cited by 6 publications

(6 citation statements)

References 22 publications

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“…The high affinity of gold with amine has been used in multiple cases for the immobilization of gold colloids, however the precise chemical mechanism has not been discussed . The –NH‐terminated surface investigated here obviously serves as a growth surface for the OMCVD of AuNPs; nucleation and growth takes place.…”

Section: Discussionmentioning

confidence: 99%

“…In the last two decades, nanotechnology started to take advantage of various forms of CVD for many different fabrication purposes. Although nanotubes and nanowires are the most widely known nanostructures produced by CVD, a variety of other structures, such as AuNPs, AuNP/semiconductor and AuNP/titania composites, AuNP/transition metal composites, SiO 2 sandwiched AuNP arrays, AuNP‐doped vanadium dioxide thin films, and titanium dioxide/tin dioxide nanocomposites has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Amine groups are known for their strong affinity to gold . Several studies on the immobilizing of colloidal AuNPs on aminosilane‐functionalized surfaces have been reported . Hexamethyldisilazane (HMDS) silanization is a standard process in lithography to enhance photoresist adhesion .…”

Section: Introductionmentioning

confidence: 99%

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Surface‐immobilized Gold Nanoparticles by Organometallic CVD on Amine‐terminated Glass Surfaces

Ertorer

Avery

Pavelka

et al. 2013

Chemical Vapor Deposition

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The growth of surface-immobilized gold nanoparticles with organometallic (OM)CVD on amine-terminated surfaces, utilizing a (trimethylphospine)methylgold ((CH 3 ) 3 PAuCH 3 ) precursor is described. Samples fabricated using various deposition times are characterized by UV-vis spectroscopy and scanning electron microscopy (SEM). Particle stability on the samples is tested by washing and rinsing treatments with various organic solvents. A biotin-streptavidin scheme is applied to demonstrate the biosensing capabilities of the samples. The size, interparticle distance, and shape of the gold nanoparticles demonstrates that OMCVD is a simple, economic, and fast way of fabricating surface-bonded and stable gold nanoparticles. The plasmonic properties, the stability of the particles, and the biotin-streptavidin test show that these OMCVD-grown gold nanoparticles are suitable for reproducible, low noise, and highly sensitive biosensing applications.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface‐immobilized Gold Nanoparticles by Organometallic CVD on Amine‐terminated Glass Surfaces

Ertorer

Avery

Pavelka

et al. 2013

Chemical Vapor Deposition

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“…146 In another similar attempt, ferritin cage loaded with catalytic Au NPs were immobilized to a silicon substrate for the growth of silicon nanowire (SiNW) by CVD. 147 The apoferritin encapsulated homogeneous gold-silver alloy NPs aid in the catalytic reduction of 4-nitrophenol into 4-aminophenol in the presence of NaBH 4 . 152 A bimetallic nanoreactor is prepared by loading Au-Pd NPs in apoferritin core that shows 2.5-fold higher catalytic reactivity of olefin hydrogenation as compared to Pd 0 NPs in the cage.…”

Section: Biocatalystmentioning

confidence: 99%

Ferritin Nanocages: A Novel Platform for Biomedical Applications

Bhushan¹,

Su²,

Matai³

et al. 2014

j biomed nanotechnol

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Ferritin is a ubiquitous iron storage protein responsible for maintaining the iron homeostasis in living organism and thereby protects the cell from oxidative damage. The ferritin protein cages have been used as a reaction vessel for the synthesis of various non-native metallic nanoparticles inside its core and also used as a nanocarrier for various applications. Lack of suitable non-viral carrier for targeted delivery of anticancer drugs and imaging agents is the major problem in cancer therapy and diagnosis. The pH dependent reversible assembling and disassembling property of ferritin renders it as a suitable candidate for encapsulating a variety of anticancer drugs and imaging probes. Ferritins external surface is chemically and genetically modifiable which can serve as attachment site for tumor specific targeting peptides or moieties. Recent studies, further establishes ferritin as a multifunctional nanocarrier for targeted cancer diagnosis and therapy. Moreover, the biological origin of these protein cages makes it a biocompatible nanocarrier that stabilizes and protects the enclosed particles from the external environment without provoking any toxic or immunogenic responses. This review mainly focuses on the application of ferritin nanocages as a novel non-viral nanocarrier for cancer therapy and it also highlights various biomedical applications of ferritin nanocages.

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“…It is also difficult to achieve a uniform dispersion of Au seeds directly on a H-terminated Si substrate without using substances which contaminate the substrate, such as lysine. For example, Au-apoferritins, together with other Au colloids as catalysts, can realize the Si NWs growth with several nanometers in diameter without epitaxy [11,12]. However, in order to achieve a high density of ultra-thin Si NWs grown epitaxially on Si substrate with a uniform size distribution, small catalytic seeds on H-terminated Si with a uniform size distribution should be maintained at the growth temperature above its eutectic liquid temperature in a VLS growth mechanism.…”

Section: Introductionmentioning

confidence: 99%

Epitaxial growth of vertically free-standing ultra-thin silicon nanowires

Zhou¹,

Liu²,

Gao³

et al. 2015

Nanotechnology

Self Cite

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We report epitaxial growth of ultra-thin vertically free-standing silicon nanowires (Si NWs) on Si(111) and Si(110) substrate, by an ultra-high vacuum chemical vapor deposition method. The epitaxial growth direction of Si NWs with sub-10 nm diameters was found to be dependent upon the orientation type of the Si substrate. The 〈112〉 and 〈110〉 epitaxial growth directions are crystallographically preferred on Si(111) and Si(110) substrates, respectively. Especially, for the epitaxy on Si(110), most of the Si NWs are grown vertically in the [110] direction with sub-5 nm diameters. Based on transmission electron microscope investigations, a growth model for ultra-thin Si NWs was deduced from the morphology of interface between catalyst and nanowire, and the growth direction at a very early stage of epitaxy was determined.

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Immobilization of Apoferritin‐Templated Seeds for Si Nanowire Growth

Cited by 6 publications

References 22 publications

Surface‐immobilized Gold Nanoparticles by Organometallic CVD on Amine‐terminated Glass Surfaces

Surface‐immobilized Gold Nanoparticles by Organometallic CVD on Amine‐terminated Glass Surfaces

Ferritin Nanocages: A Novel Platform for Biomedical Applications

Epitaxial growth of vertically free-standing ultra-thin silicon nanowires

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