Highly Stable Localized Plasmon Transducers Obtained by Thermal Embedding of Gold Island Films on Glass

Karakouz, Tanya; Tesler, Alexander B.; Bendikov, Tatyana; Vaskevich, Alexander; Rubinstein, Israel

doi:10.1002/adma.200703092

Cited by 106 publications

(150 citation statements)

References 34 publications

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“…[25,26] Data were recorded at different preparation stages, namely, on bare gold, after blocking the exposed glass surface with PEG-silane, and after incubation [32] C) Binding sensogram corresponding to the different stages shown in A), recorded in real time using the ProteOn XPR36: The carboxylic groups on the surface were activated by EDC/Sulfo-NHS, followed by NeutrAvidin which binds to the activated surface via its exposed amine groups. The surface was then blocked by ethanolamine (EA), followed by Au NPs that bind to the NeutrAvidin.…”

Section: His-blip Binding To Gold Islands and Continuous Gold Sur-a Cmentioning

confidence: 99%

A Quantitative, Real‐Time Assessment of Binding of Peptides and Proteins to Gold Surfaces

Cohavi

Reichmann

Abramovich

et al. 2010

Chemistry A European J

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Interactions of peptides and proteins with inorganic surfaces are important to both natural and artificial systems; however, a detailed understanding of such interactions is lacking. In this study, we applied new approaches to quantitatively measure the binding of amino acids and proteins to gold surfaces. Real-time surface plasmon resonance (SPR) measurements showed that TEM1-β-lactamase inhibitor protein (BLIP) interacts only weakly with Au nanoparticles (NPs). However, fusion of three histidine residues to BLIP (3H-BLIP) resulted in a significant increase in the binding to the Au NPs, which further increased when the histidine tail was extended to six histidines (6H-BLIP). Further increasing the number of His residues had no effect on the binding. A parallel study using continuous (111)-textured Au surfaces and single-crystalline, (111)-oriented, Au islands by ellipsometry, FTIR, and localized surface plasmon resonance (LSPR) spectroscopy further confirmed the results, validating the broad applicability of Au NPs as model surfaces. Evaluating the binding of all other natural amino acid homotripeptides fused to BLIP (except Cys and Pro) showed that aromatic and positively-charged residues bind preferentially to Au with respect to small aliphatic and negatively charged residues, and that the rate of association is related to the potency of binding. The binding of all fusions was irreversible. These findings were substantiated by SPR measurements of synthesized, free, soluble tripeptides using Au-NP-modified SPR chips. Here, however, the binding was reversible allowing for determination of binding affinities that correlate with the binding potencies of the related BLIP fusions. Competition assays performed between 3H-BLIP and the histidine tripeptide (3 His) suggest that Au binding residues promote the adsorption of proteins on the surface, and by this facilitate the irreversible interaction of the polypeptide chain with Au. The binding of amino acids to Au was simulated by using a continuum solvent model, showing agreement with the experimental values. These results, together with the observed binding potencies and kinetics of the BLIP fusions and free peptides, suggest a binding mechanism that is markedly different from biological protein-protein interactions.

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Section: His-blip Binding To Gold Islands and Continuous Gold Sur-a Cmentioning

confidence: 99%

A Quantitative, Real‐Time Assessment of Binding of Peptides and Proteins to Gold Surfaces

Cohavi

Reichmann

Abramovich

et al. 2010

Chemistry A European J

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“…Approaches include pre-patterning the substrate [10][11][12][13][14][15] or the thin film [16][17][18][19] and the introduction of a sacrificial layer [20,21]. Applications of the produced particle arrays are envisaged to range from templates for the growth of nanostructures [22,11,23,24], magnetic storage arrays [25,26], optical sensors [27,28] and plasmonic systems [29,30], over photocatalytic reactors [31] to plasmon-enhanced back reflectors in solar cells [32,33].…”

Section: Introductionmentioning

confidence: 99%

The process of solid-state dewetting of Au thin films studied by in situ scanning transmission electron microscopy

et al. 2015

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“…After cleaning, the glass slides were silanized as follows: immersion in 10% APTMS solution in methanol overnight, followed by rinsing with methanol and twice with ethanol in an ultrasonic bath. [9] The nominal thickness of the evaporated Au films ranged between 0.5-15 nm. The Au films were deposited at low deposition rates of 0.005-0.012 nm Á s À1 , resulting in the formation of island-type films with thicknesses less than 10 nm.…”

Section: Introductionmentioning

confidence: 99%

Third‐Order Nonlinear Optical Response of Gold‐Island Films

Xenogiannopoulou

Iliopoulos

Couris

et al. 2008

Adv Funct Materials

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Films of gold nanoscaled islands with thicknesses ranging between 0.5 and 15 nm were prepared by thermal evaporation onto untreated and aminosilane‐pretreated glass substrates. Post‐deposition annealing was found to modify the morphological characteristics of the islands (e.g., average island area and height, inter‐island distance, etc.), resulting in changes of the localized surface plasmon resonance (SPR) characteristics and, therefore, modifying the nonlinear optical (NLO) response of the films. The NLO response of both unannealed and annealed (20 h at 200 °C) films was studied by means of the optical Kerr effect (OKE), using 35 ps, 532 nm laser excitation, while measurements performed by means of the Z‐scan technique allowed for the determination of both the nonlinear refraction and absorption characteristics of the films. The results are discussed and compared with other reports.

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Highly Stable Localized Plasmon Transducers Obtained by Thermal Embedding of Gold Island Films on Glass

Cited by 106 publications

References 34 publications

A Quantitative, Real‐Time Assessment of Binding of Peptides and Proteins to Gold Surfaces

A Quantitative, Real‐Time Assessment of Binding of Peptides and Proteins to Gold Surfaces

The process of solid-state dewetting of Au thin films studied by in situ scanning transmission electron microscopy

Third‐Order Nonlinear Optical Response of Gold‐Island Films

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