Breaking the mould: Casting on the nanometre scale

Baumberg, Jeremy J.

doi:10.1038/nmat1562

Cited by 19 publications

(13 citation statements)

References 8 publications

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“…By depositing/casting the desired materials inside the templates, large arrays can be made efficiently and economically [1]. One of the simplest and most widely used materials for this purpose is opaline.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

et al. 2014

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The hybrid structures composed of gold nanoparticles and carbon nanotubes were prepared using porous alumina membranes as templates. Carbon nanotubes were synthesized inside the pores of these templates by the non-catalytic decomposition of acetylene. The inner cavity of the supported tubes was used as nanoreactors to grow gold particles by impregnation with a gold salt, followed by a calcination-reduction process. The samples were characterized by transmission electron microscopy and X-ray energy dispersion spectroscopy techniques. The resulting hybrid products are mainly encapsulated gold nanoparticles with different shapes and dimensions depending on the concentration of the gold precursor and the impregnation procedure. In order to understand the electronic transport mechanisms in these nanostructures, their conductance was measured as a function of temperature. The samples exhibit a ‘non-metallic’ temperature dependence where the dominant electron transport mechanism is 1D hopping. Depending on the impregnation procedure, the inclusion of gold nanoparticles inside the CNTs can introduce significant changes in the structure of the tubes and the mechanisms for electronic transport. The electrical resistance of these hybrid structures was monitored under different gas atmospheres at ambient pressure. Using this hybrid nanostructures, small amounts of acetylene and hydrogen were detected with an increased sensibility compared with pristine carbon nanotubes. Although the sensitivity of these hybrid nanostructures is rather low compared to alternative sensing elements, their response is remarkably fast under changing gas atmospheres.

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Section: Introductionmentioning

confidence: 99%

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

et al. 2014

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“…One of these challenges is the ability to fabricate smaller structures down to nanometer length scales whose structure-property relationships are designed to yield devices with novel electronic, optical and magnetic properties that can impact on broad areas of technology. The chemist's approach to this challenge has been to develop synthetic strategies based on templating which rely on the self-assembly or self-organisation of nanometer-sized building blocks into organized connected arrays having long-ranged organization and order [1]. The rational design of functional materials is therefore an important goal that is becoming increasingly promise within nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

Nanotemplated lead telluride thin films

Li¹,

Nandhakumar²,

Attard³

et al. 2009

Microporous and Mesoporous Materials

Self Cite

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a b s t r a c tDirect lyotropic liquid crystalline templating has been successfully applied to produce nanostructured IV-VI semiconductor PbTe thin films by electrodeposition both on gold and n-type (1 0 0) silicon substrates. The PbTe films were characterized by transmission electron microscopy, X-ray diffraction and polarized optical microscopy and the results show that the films have a regular hexagonal nanoarchitecture with a high crystalline rock salt structure and exhibit strong birefringence. The optical absorption measurements using Fourier transform infrared spectroscopy show that the nanostructured PbTe films have a direct band gap of 0.37 eV.

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“…[1] The merit of a particular template structure, if it is to find wide practical application, will be defined by its robustness, temporal and mechanical stability, and its ability to be easily integrated within a range of systems. With these criteria in mind, optical fibers with internal capillary arrays present a number of attractive properties such as very large internal surface areas, high aspect ratios and outstanding mechanical properties, making them excellent lithography free, robust and inexpensive 3D templates for materials deposition.…”

Section: Introductionmentioning

confidence: 99%

“…Another important technology used in nanofabrication is "bottom-up" or self-assembly in which the metamaterial is fabricated by depositing the desired functional materials onto a 3D template. [1] Templates ranging from polymer nano-spheres, [16][17][18] to porous silicon [19] have been used to produce metallic SERS substrates. Bottom-up fabrication is simple and inexpensive but there are limitations on the creation of stable templates and the development of deposition methods inside high aspect ratio structures.…”

Section: Introductionmentioning

confidence: 99%

Surface‐Enhanced Raman Scattering Using Microstructured Optical Fiber Substrates

Amezcua-Correa¹,

Yang²,

Finlayson³

et al. 2007

Adv Funct Materials

104

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Microstructured optical fibers (MOFs) represent a promising platform technology for fully integrated next generation surface enhanced Raman scattering (SERS) sensors and plasmonic devices. In this paper we demonstrate silver nanoparticle substrates for SERS detection within MOF templates with exceptional temporal and mechanical stability, using organometallic precursors and a high‐pressure chemical deposition technique. These 3D substrates offer significant benefits over conventional planar detection geometries, with the long electromagnetic interaction lengths of the optical guided fiber modes exciting multiple plasmon resonances along the fiber. The large Raman response detected when analyte molecules are infiltrated within the structures can be directly related to the deposition profile of the nanoparticles within the MOFs via electrical characterization.

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Breaking the mould: Casting on the nanometre scale

Cited by 19 publications

References 8 publications

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

Gold nanoparticles grown inside carbon nanotubes: synthesis and electrical transport measurements

Nanotemplated lead telluride thin films

Surface‐Enhanced Raman Scattering Using Microstructured Optical Fiber Substrates

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