Self-assembled monolayers of novel azobenzenes for optically induced switching

Stiller, Burkhard; Knochenhauer, Gerald; Markava, E.; Gustina, Daina; Muzikante, I.; Karageorgiev, Peter; Brehmer, L.

doi:10.1016/s0928-4931(99)00050-8

Cited by 33 publications

(26 citation statements)

References 13 publications

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“…17 The surface potential of pure dodecanethiol self-assembling monolayers was found to remain constant on illumination with UV and visible light. The absolute photoisomerization-induced change of the surface potential of extended, pure AzoC10 self-assembling monolayers was found to be ¾70 mV.…”

Section: Resultsmentioning

confidence: 97%

Scanning Kelvin microscopy as a tool for visualization of optically induced molecular switching in azobenzene self assembling films

Stiller

Karageorgiev

Perez-Enciso

et al. 2000

Surf. Interface Anal.

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Section: Resultsmentioning

confidence: 97%

Scanning Kelvin microscopy as a tool for visualization of optically induced molecular switching in azobenzene self assembling films

Stiller

Karageorgiev

Perez-Enciso

et al. 2000

Surf. Interface Anal.

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“…The number of point defects in the SAM is closely related to the quality of the gold surface. As a result, the measured AU of pure azo SAM on differently prepared Au surfaces (Au(l1 l), sputtered Au, ...) varies [22]. Smaller crystallites and a higher roughness lead to greater Allex,,.…”

Section: Surface Potential Measurementmentioning

confidence: 99%

Optically Induced Switching of Azobenzene Containing Self Assembling Monolayers Investigated by Kelvin Probe and Scanning Force Microscopy

Stiller¹,

Karageorgiev

Jungling³

et al. 2001

Molecular Crystals and Liquid Crystals Science and Technology.

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Mol Cn,1. Lly C r y / , VOI. 35s. pp 401-41 I Kcprints avdilable directly fiom the puhlishrr Photocopying permitted by liceme only 0 2001 OPA (Oier\e.c\ I'uhliihcn Awiclanon) N.V. Published by licence under the Gordon and Breach Science Publishers imprint.The light induced switching of self-assembled monolayers containing azobenzenes is observed in situ by the Kelvin probe method. The switching process is optimized by preparing monolayers from mixed solutions of azobenzene thiols and n-alkylene thiols. In a film the efficiency of the E/Zisornerization depends on both the spacer length between azobenzene group and gold surface as well as the free volume in the film, tuned by the n-alkylene thiol fraction in the mixture. An optimum was found in a mixed self-assembling film conlaining 33% 4-fluoromethyl-4'-(lO-carboxy-decyloxy) azobenzene in a dodecane thiol matrix. The structure of the films were characterized by lTIR and AFM.

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“…[80] In a similar set of experiments, KPFM was able to monitor macroscopically the light-induced dipole-moment changes due to cis-trans molecular rearrangement in SAMs of thiolazobenzenes on Au (111). [81] A well-known class of molecules with a great potential for organic-electronics applications are poly(thiophenes). KPFM studies provided unambiguous evidence for the dependence of the measured work function of the molecular material on the substrate type.…”

Section: Wwwadvmatde 155mentioning

confidence: 99%

Electronic Characterization of Organic Thin Films by Kelvin Probe Force Microscopy

2006

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This review highlights the potential of Kelvin probe force microscopy (KPFM) beyond imaging to simultaneously study structural and electronic properties of functional surfaces and interfaces. This is of paramount importance since it is well established that a solid surface possesses different properties than the bulk material. The versatility of the technique allows one to carry out investigations in a non‐invasive way for different environmental conditions and sample types with resolutions of a few nanometers and some millivolts. KPFM can be used to acquire a wide knowledge of the overall electronic and electrical behavior of a sample surface. Moreover, by KPFM it is possible to study complex electronic phenomena in supramolecular engineered systems and devices. The combination of such a methodology with external stimuli, e.g., light irradiation, opens new doors to the exploration of processes occurring in nature or in artificial complex architectures. Therefore, KPFM is an extremely powerful technique that permits the unraveling of electronic (dynamic) properties of materials, enabling the optimization of the design and performance of new devices based on organic‐semiconductor nanoarchitectures.

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Self-assembled monolayers of novel azobenzenes for optically induced switching

Cited by 33 publications

References 13 publications

Scanning Kelvin microscopy as a tool for visualization of optically induced molecular switching in azobenzene self assembling films

Scanning Kelvin microscopy as a tool for visualization of optically induced molecular switching in azobenzene self assembling films

Optically Induced Switching of Azobenzene Containing Self Assembling Monolayers Investigated by Kelvin Probe and Scanning Force Microscopy

Electronic Characterization of Organic Thin Films by Kelvin Probe Force Microscopy

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