Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 38, Pages 9036-9043Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc03319a
Keywords
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Funding
- Ministerio de Economia y Competitividad from Spain
- fondos FEDER [CTQ2012-33198, CTQ2013-50187-EXP, CSIC10-4E-805, CSD2010-00024, E-54]
- DGA
- EPSRC [EP/K007785/1, EP/H035184/1, EP/K007548/1]
- ARC [DP140100855]
- EPSRC [EP/M029522/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M029522/1, EP/K007785/1] Funding Source: researchfish
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In this contribution the photoreduction of silver ions coordinated onto a Langmuir-Blodgett monolayer is presented as an effective method for the deposition of the top contact electrode in metal/monolayer/metal devices. Silver cations were incorporated from an aqueous AgNO3 sub-phase of Langmuir films of 4,4'-(1,4-phenylenebis(ethyne-2,1-diyl))dibenzoic acid upon the transference of these films onto a metallic substrate. Subsequent irradiation of the silver-ion functionalized Langmuir-Blodgett films with 254 nm light results in the photoreduction of silver cations to produce metallic silver nanoparticles, which are distributed over the organic monolayer and exhibit a surface coverage as large as 76% of the monolayer surface. Electrical properties of these metal/monolayer/metal devices were determined by recording I-V curves, which show a sigmoidal behaviour indicative of well-behaved junctions free of metallic filaments and short-circuits. The integrity of the organic monolayer upon the irradiation process and formation of the silver top-contact electrode has also been demonstrated through cyclic voltammetry experiments.
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