Palladium on Plastic Substrates for Plasmonic Devices

Zuppella, Paola; Pasqualotto, E.; Zuccon, Sara; Gerlin, Francesca; Corso, Alain Jody; Scaramuzza, Matteo; Toni, A. De; Paccagnella, A.; Pelizzo, Maria Guglielmina

doi:10.3390/s150101138

Cited by 15 publications

(14 citation statements)

References 23 publications

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“…Such combinations aim at reducing the final cost of the sensor and also increase the number of possible operating points (OP), i.e., the pair for both the AIM and WIM modes (Oliveira et al, 2013;Oliveira et al, 2014b). Recently, palladium and other metals have been used to provide good characteristics for biological and industrial applications (Zuppella et al, 2015).…”

Section: Effect Of Different Bimetallic Layer Combinationsmentioning

confidence: 99%

Polymer-based surface plasmon resonance biochip: construction and experimental aspects

et al. 2016

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Introduction: Surface plasmon resonance biosensors are high sensitive analytical instruments that normally employ glass materials at the optical substrate layer. However, the use of polymer-based substrates is increasing in the last years due to favorable features, like: disposability, ease to construction and low-cost design. Review: Recently, a polymer-based SPR biochip was proposed by using monochromatic and polychromatic input sources. Its construction and experimental considerations are detailed here. Experimental considerations and results, aspects from performance characteristics (resonance parameters, sensitivity and full width at half maximum -FWHM -calculations) are presented for hydrophilic and hydrophobic solutions. It is included also a brief description of the state of the art of polymer-based SPR biosensors.

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Section: Effect Of Different Bimetallic Layer Combinationsmentioning

confidence: 99%

Polymer-based surface plasmon resonance biochip: construction and experimental aspects

et al. 2016

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“…They show inverted surface plasmon resonance (ISPR) response that, in some cases, provides undisputed benefits [1,5]. The performances of graphene/metal bilayers have been then investigated both from a theoretical and experimental point of view [1][2][3][4][5][6]. The requirements for the fabrications of good biochips are the uniformity of graphene layer on the top and a fine tuning of its chemico-physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…The first attempts have been performed in standard chips based on gold and silver [3,4], but other metals such as palladium and iridium have been considered in combination with graphene. They show inverted surface plasmon resonance (ISPR) response that, in some cases, provides undisputed benefits [1,5]. The performances of graphene/metal bilayers have been then investigated both from a theoretical and experimental point of view [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…A DNA chain has been identified as a target since it can be applied to many diagnostic tools, such as several biomarkers of cancer or cystic fibrosis [5]. The SPR response has been modelling and the results discussed.…”

Section: Introductionmentioning

confidence: 99%

“…It consists of nickel film into a BK7 prism with 2 nm of chromium interposed for adhesion. The target selected for the modeling is a DNA chain since it can be applied to many diagnostic tools, such as several biomarkers of cancer or cystic fibrosis [3][4][5]. The system was designed to work in Kretschmann configuration.…”

Section: Introductionmentioning

confidence: 99%

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Graphene-like coatings for biosensors devices

et al. 2015

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The interest in graphene-like materials involves many research areas, including the development of biosensors devices. We have recently studied the use of graphene/metal bilayer for surface plasmon resonance (SPR) equipment devoted to detection of chemical processes and biomolecules recognition. The dual role of graphene is to protect the metal layer underneath and to enhance the bioaffinity by adsorbing biomolecules with carbon-based ring structures. Depending on the application, it may be necessary laser and chemical treatments of graphene to improve the performances of the whole device. The processing effects will be investigated by near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The use of synchrotron light is mandatory for NEXAFS analysis since a continuous EUV source of selected polarization is required. The ideas, the analysis and the results are the subjects of this work.

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Ultraviolet photoelectron spectroscopic study on the interface electronic structure of the L‐cysteine on Pd surface

Koswattage

Liyanage

Maduwantha

2022

Surface & Interface Analysis

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L-cysteine is one of the most versatile biomolecules with a unique metal-binding ability. L-cysteine has an outstanding role in the bioelectronics field as a linker between proteins of biomolecules and metal electrodes of the inorganic metals through multiple functional groups. The interface electronic structures between L-cysteine with metals deserve further investigation for applications in bioelectronics. However, the interface electronic structures of L-cysteine and metals have not been well understood. We have previously reported the existence of a new state between the highest occupied molecular orbital (HOMO) of L-cysteine and the Fermi level of the metals for L-cysteine/Au(111), L-cysteine/Ag(111), and L-cysteine/Cu(111) using photoemission spectroscopy and attributed the formation of the new state to an interaction of the d band with HOMO of L-cysteine. In this study, the electronic structure at the interfaces of L-cysteine on a Palladium (Pd) surface is investigated by ultraviolet photoemission spectroscopy (UPS) using synchrotron radiation including work function, secondary electron cutoff (SECO), and HOMO onset; the position of an interface state, charge injection barrier, and ionization energy are estimated. It is observed that thin-film spectra of L-cysteine on Pd surfaces in the valance top region are different from the L-cysteine thick films, and this can be attributed to an interaction between a sulfur-originated state of L-cysteine HOMO with Pd d orbitals. Also, a 0.6-eV SECO shift is estimated due to the charge transferring between L-cysteine and Pd. The results of SECO further confirm the weakening of the Pd-sulfur bond with increasing L-cysteine coverage on Pd.

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Palladium on Plastic Substrates for Plasmonic Devices

Cited by 15 publications

References 23 publications

Polymer-based surface plasmon resonance biochip: construction and experimental aspects

Polymer-based surface plasmon resonance biochip: construction and experimental aspects

Graphene-like coatings for biosensors devices

Ultraviolet photoelectron spectroscopic study on the interface electronic structure of the L‐cysteine on Pd surface

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