Microstructure and multiphoton luminescence of Au nanocrystals prepared by using glancing deposition method

Su, Xiong-Rui; Li, Min; Zhou, Zhang‐Kai; Zhai, Yueying; Fu, Qiang; Huang, Cheng; Song, H.; Zhang, Hao

doi:10.1016/j.jlumin.2007.10.036

Cited by 9 publications

(2 citation statements)

References 38 publications

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“…Nevertheless, this effect has been proposed to explain the behavior of many chemical systems, not only limited to heterogeneous catalysis. [6][7][8][9][10][11][12][13][14] Various techniques, like EXAFS, TEM, XPS and GISAXS, have been recently used to understand the nature of the metalsupport interaction. [15][16][17][18] The experimental approach has been often paralleled with computational methods based on first principle calculations in which the metal cluster growth mechanism is divided into a series of elementary steps, eventually providing a complete microscopic characterization of the process.…”

Section: Introductionmentioning

confidence: 99%

Influence of metal–support interaction on the surface structure of gold nanoclusters deposited on native SiOx/Si substrates

Portale¹,

Sciortino²,

Albonetti³

et al. 2014

Phys. Chem. Chem. Phys.

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The structure of small gold nanoclusters (around 2.5 nm) deposited on different silica-on-silicon (SiOx/Si) substrates is investigated using several characterization techniques (AFM, XRD, EXAFS and GISAXS). The grain morphology and the surface roughness of the deposited gold cluster layers are determined by AFM. The in-plane GISAXS intensity is modelled in order to obtain information about the cluster size and the characteristic length scale of the surface roughness. The surface morphology of the deposited clusters depends on whether the native defect-rich (n-SiOx/Si) or the defect-poor substrate obtained by thermal treatment (t-SiO2/Si) is used. Gold clusters show a stronger tendency to aggregate when deposited on n-SiOx/Si, resulting in films characterized by a larger grain dimension (around 20 nm) and by a higher surface roughness (up to 5 nm). The more noticeable cluster aggregation on n-SiOx/Si substrates is explained in terms of metal-support interaction mediated by the defects located on the surface of the native silica substrate. Evidence of metal-support interaction is provided by EXAFS, demonstrating the existence of an Au-O distance for clusters deposited on n-SiOx/Si that is not found on t-SiO2/Si.

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Section: Introductionmentioning

confidence: 99%

Influence of metal–support interaction on the surface structure of gold nanoclusters deposited on native SiOx/Si substrates

Portale¹,

Sciortino²,

Albonetti³

et al. 2014

Phys. Chem. Chem. Phys.

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“…At the same time, the energetic and reactive species in the plasma were used to deposit an additional inorganic material. Codeposition of more than one material, all of them under oblique conditions either simultaneously − or in the form of multilayers − has been reported in the literature. The essential difference of our work with respect to standard GLAD and codeposition techniques (usually referred as GLACD) is that here the inorganic material is deposited at a perpendicular geometry with respect to the substrate while GLAD of a second material (in our case, organic) is taking place simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Growth Assisted by Glancing Angle Deposition: A New Technique to Fabricate Highly Porous Anisotropic Thin Films

Sánchez‐Valencia

Longtin

Rossell

et al. 2016

ACS Appl. Mater. Interfaces

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We report a new methodology based on glancing angle deposition (GLAD) of an organic molecule in combination with perpendicular growth of a second inorganic material. The resulting thin films retain a very well-defined tilted columnar microstructure characteristic of GLAD with the inorganic material embedded inside the columns. We refer to this new methodology as growth assisted by glancing angle deposition or GAGLAD, since the material of interest (here, the inorganic) grows in the form of tilted columns, though it is deposited under a nonglancing configuration. As a "proof of concept", we have used silver and zinc oxide as the perpendicularly deposited material since they usually form ill-defined columnar microstructures at room temperature by GLAD. By means of our GAGLAD methodology, the typical tilted columnar microstructure can be developed for materials that otherwise do not form ordered structures under conventional GLAD. This simple methodology broadens significantly the range of materials where control of the microstructure can be achieved by tuning the geometrical deposition parameters. The two examples presented here, Ag/Alq3 and ZnO/Alq3, have been deposited by physical vapor deposition (PVD) and plasma enhanced chemical vapor deposition (PECVD), respectively: two different vacuum techniques that illustrate the generality of the proposed technique. The two type of hybrid samples present very interesting properties that demonstrate the potentiality of GAGLAD. On one hand, the Ag/Alq3 samples present highly optical anisotropic properties when they are analyzed with linearly polarized light. To our knowledge, these Ag/Alq3 samples present the highest angular selectivity reported in the visible range. On the other hand, ZnO/Alq3 samples are used to develop highly porous ZnO thin films by using Alq3 as sacrificial material. In this way, antireflective ZnO samples with very low refractive index and extinction coefficient have been obtained.

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Amorphous Thin Film Deposition

Nazabal¹,

Němec

2019

Springer Handbook of Glass

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Microstructure and multiphoton luminescence of Au nanocrystals prepared by using glancing deposition method

Cited by 9 publications

References 38 publications

Influence of metal–support interaction on the surface structure of gold nanoclusters deposited on native SiOx/Si substrates

Influence of metal–support interaction on the surface structure of gold nanoclusters deposited on native SiOx/Si substrates

Growth Assisted by Glancing Angle Deposition: A New Technique to Fabricate Highly Porous Anisotropic Thin Films

Amorphous Thin Film Deposition

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