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Tailoring the Morphology and Fractal Dimension of 2D Mesh‐like Gold Gels
Author(s) -
Hiekel Karl,
Jungblut Swetlana,
Georgi Maximilian,
Eychmüller Alexander
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202002951
Subject(s) - materials science , stacking , fractal dimension , fabrication , fractal , silicon , nanotechnology , phase (matter) , polymer , composite material , optoelectronics , mathematics , physics , medicine , mathematical analysis , alternative medicine , pathology , nuclear magnetic resonance , quantum mechanics
As there is a great demand of 2D metal networks, especially out of gold for a plethora of applications we show a universal synthetic method via phase boundary gelation which allows the fabrication of networks displaying areas of up to 2 cm 2 . They are transferred to many different substrates: glass, glassy carbon, silicon, or polymers such as PDMS. In addition to the standardly used web thickness, the networks are parametrized by their fractal dimension. By variation of experimental conditions, we produced web thicknesses between 4.1 nm and 14.7 nm and fractal dimensions in the span of 1.56 to 1.76 which allows to tailor the structures to fit for various applications. Furthermore, the morphology can be tailored by stacking sheets of the networks. For each different metal network, we determined its optical transmission and sheet resistance. The obtained values of up to 97 % transparency and sheet resistances as low as 55.9 Ω/sq highlight the great potential of the obtained materials.