Spectral characterization of two-dimensional Thue–Morse quasicrystals realized with high resolution lithography

Matarazzo, Vitantonio; Nicola, S. De; Zito, Gianluigi; Mormile, Pasquale; Rippa, Massimo; Abbate, Giancarlo; Zhou, Jixiang; Petti, Lucia

doi:10.1088/2040-8978/13/1/015602

Cited by 22 publications

(13 citation statements)

References 23 publications

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“…Optical and plasmonic behaviors of the ThMo patterns have been widely reported in literature from both numerical and experimental point of views. They make such geometry an attractive candidate for the realization of high-performance nanosensors [21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Nanocavities-based Aperiodic crystal for Protein-Protein Recognition SERS sensors

Rippa¹,

Castagna²,

Pannico³

et al. 2017

Optical Data Processing and Storage

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Abstract:The revelation of protein-protein interactions is one of the main preoccupations in the eld of proteomics. Nanoplasmonics has emerged as an attractive surface-based technique because of its ability to sense protein binding under physiological conditions in a label-free manner. Here, we present a detailed experimental study of the use of aperiodic photonic nanocavities for plasmonic Surface Enhanced Raman Scattering (SERS) protein detection and recognition. The plasmonic crystal is designed on a 2D Thue-Morse array con guration. The SERS nanosensor is coated with a proper self-assembled monolayer to covalently bind Bovine Serum Albumin that is a well known model to study biological (speci cally, protein) systems. The performance of the nanosensor is assessed by recording a new Raman (SERS) peak in the ngerprint region and by a giant enhancement of the SERS signal intensity, both reported and discussed.

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Section: Introductionmentioning

confidence: 99%

Plasmonic Nanocavities-based Aperiodic crystal for Protein-Protein Recognition SERS sensors

Rippa¹,

Castagna²,

Pannico³

et al. 2017

Optical Data Processing and Storage

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“…Moreover, novel PBG aperiodic structures defined by recursive substitutional sequences like one-dimensional (1D) and 2D Thue-Morse patterns cannot be realized even in principle by multiple-beam interference. Experimental realization of photonic structures exhibiting large area 2D Thue-Morse arrangement has been recently reported by the authors for the first time to our knowledge [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

et al. 2011

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Recently, important efforts have been dedicated to the realization of a fascinating class of new photonic materials or metamaterials, known as photonic quasicrystals (PQCs), in which the lack of the translational symmetry is compensated by rotational symmetries not achievable by the conventional periodic crystals. As ever, more advanced functionality is demanded and one strategy is the introduction of non-linear and/or active functionality in photonic materials. In this view, core/shell nanorods (NRs) are a promising active material for light-emitting applications. In this article a two-dimensional (2D) hybrid a 2D octagonal PQC which consists of air rods in an organic/inorganic nanocomposite is proposed and experimentally demonstrated. The nanocomposite was prepared by incorporating CdSe/CdS core/shell NRs into a polymer matrix. The PQC was realized by electron beam lithography (EBL) technique. Scanning electron microscopy, far field diffraction and spectra measurements are used to characterize the experimental structure. The vertical extraction of the light, by the coupling of the modes guided by the PQC slab to the free radiation via Bragg scattering, consists of a narrow red emissions band at 690 nm with a full width at half-maximum (FWHM) of 21.5 nm. The original characteristics of hybrid materials based on polymers and colloidal NRs, able to combine the unique optical properties of the inorganic moiety with the processability of the host matrix, are extremely appealing in view of their technological impact on the development of new high performing optical devices such as organic light-emitting diodes, ultra-low threshold lasers, and non-linear devices.PACS: 81.07.Pr Organic-inorganic hybrid nanostructures, 81.16.-c Methods of nanofabrication and processing, 42.70.Qs Photonic band-gap materials.

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“…ThMo aperiodic geometry is generated by the iterative substitution rule: A → AB, B → BA that can be extended to two dimensions [ 29 ]. Optical properties of the ThMo nanopattern have been widely investigated and their peculiarities (singular continuous Fourier/Diffraction spectra, self-similar hierarchy of pseudoband-gap regions, omnidirectional reflectivity, and light emission enhancement) make such geometries attractive candidates for the realization of high-performance plasmonic nanosensors [ 23 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Despite the greater difficulty of both design and fabrication that they require compared to conventional periodical pattern, aperiodic arrangements show important advantages for the realization of sensing systems.…”

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confidence: 99%

“…In order to obtain an optical sensor suitable for the pathogen detection, we chose to exploit as metastructure the ThMo distribution, whose potential for sensing was already demonstrated [ 23 , 36 , 39 ]. In our previous work, we studied the plasmonic properties of ThMo-arranged NCs by Finite Difference in Time Domain (FDTD) simulations suggesting a characteristic near-field with a high spatial density of hot-spots [ 31 ]. Moreover, we demonstrated that a sensor patterned with such geometry and functionalized with 4-ATP significantly enhanced the whole spectrum of a model protein (Bovine Serum Albumin—BSA) [ 39 ].…”

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confidence: 99%

SERS Biosensor Based on Engineered 2D-Aperiodic Nanostructure for In-Situ Detection of Viable Brucella Bacterium in Complex Matrix

et al. 2021

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Brucella is a foodborne pathogen globally affecting both the economy and healthcare. Surface Enhanced Raman Spectroscopy (SERS) nano-biosensing can be a promising strategy for its detection. We combined high-performance quasi-crystal patterned nanocavities for Raman enhancement with the use of covalently immobilized Tbilisi bacteriophages as high-performing bio-receptors. We coupled our efficient SERS nano-biosensor to a Raman system to develop an on-field phage-based bio-sensing platform capable of monitoring the target bacteria. The developed biosensor allowed us to identify Brucella abortus in milk by our portable SERS device. Upon bacterial capture from samples (104 cells), a signal related to the pathogen recognition was observed, proving the concrete applicability of our system for on-site and in-food detection.

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Spectral characterization of two-dimensional Thue–Morse quasicrystals realized with high resolution lithography

Cited by 22 publications

References 23 publications

Plasmonic Nanocavities-based Aperiodic crystal for Protein-Protein Recognition SERS sensors

Plasmonic Nanocavities-based Aperiodic crystal for Protein-Protein Recognition SERS sensors

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

SERS Biosensor Based on Engineered 2D-Aperiodic Nanostructure for In-Situ Detection of Viable Brucella Bacterium in Complex Matrix

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