Decoration of Porous Silicon with Gold Nanoparticles via Layer-by-Layer Nanoassembly for Interferometric and Hybrid Photonic/Plasmonic (Bio)sensing

Mariani, Stefano; Paghi, Alessandro; Mattina, Antonino A. La; Debrassi, Aline; Dähne, Lars; Barillaro, Giuseppe

doi:10.1021/acsami.9b15737

Cited by 50 publications

(48 citation statements)

References 59 publications

(122 reference statements)

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“…Besides that, incorporating QDs, which are characterized by high refractive index, has been realized as a tool for signal amplification via labeling QDs with different biomolecules and using the reflectance spectra to detect the amplified refractive index signal resulting from their interactions with the hosting PSi matrix (Lv et al, 2017;Massad-Ivanir et al, 2018b;Zhou et al, 2019). In a different scenario, incorporation of AuNPs into the PSi matrix enhances the contrast of the Fabry-P=erot fringes due to augmented surface reflectivity and consequently increases the sensitivity for both bulk refractive index sensing and unspecific/affinity biosensing, Figure 1C (Mariani et al, 2019). Interestingly, incorporating AuNPs into PSiMC has been found to enhance the fluorescence signal of the labeled probe DNA molecules upon hybridization with target DNA molecules due to the LSPR of AuNPs inside the PSiMC (Wang and Jia, 2018), Tables S1.…”

Section: Psi-based Hybrid Biosensorsmentioning

confidence: 99%

“…Wang et al employed Rhodamine Red (RRA) fluorescent dye for labeled DNA detection using a PSiMC/AuNPs hybrid matrix with a LOD value of 10 pM (Wang and Jia, 2018), Table S1. Recently, Mariani et al reported the fabrication of PSi/AuNPs hybrid photonic/plasmonic optical biosensor by employing a LbL self-assembly approach (Mariani et al, 2019). Compared to the traditional in situ reduction procedure, the self-assembling of previously prepared AuNPs onto the target surface provides a practical way to control the AuNPs' properties such as shape, dimension, and related optical/electrical features.…”

Section: Psi/plasmonic Mnps Hybridsmentioning

confidence: 99%

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Hybrid Porous Silicon Biosensors Using Plasmonic and Fluorescent Nanomaterials: A Mini Review

Abu-Thabit

Ratemi

2020

Front. Chem.

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During the last two decades, porous silicon (PSi) has been proposed as a high-performance biosensing platform due to its biocompatibility, surface tailorability, and reproducibility. This review focuses on the recent developments and progress in the area related to hybrid PSi biosensors using plasmonic metal nanoparticles (MNPs), fluorescent quantum dots (QDs), or a combination of both MNPs and QDs for creating hybrid nanostructured architectures for ultrasensitive detection of biomolecules. The review discusses the mechanisms of sensitivity enhancement based on Localized Surface Plasmon Resonance (LSPR) of MNPs, Fluorescence Resonance Energy Transfer (FRET) in the case of MNPs/QDs donor-acceptor interactions, and photoluminescence/fluorescence enhancement resulting from the embedded fluorescent QDs inside the PSi microcavity. The review highlights the key features of hybrid PSi/MNPs/QDs biosensors for dual-mode detection applications.

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Section: Psi-based Hybrid Biosensorsmentioning

confidence: 99%

Section: Psi/plasmonic Mnps Hybridsmentioning

confidence: 99%

Hybrid Porous Silicon Biosensors Using Plasmonic and Fluorescent Nanomaterials: A Mini Review

Abu-Thabit

Ratemi

2020

Front. Chem.

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“…[ 26 ] The lower n‐PSi refraction index, with respect to that of c‐Si, has enabled the fabrication of label‐free optical biosensors exploiting back‐scattered n‐PSi interferometers. [ 27–29 ] Bioresorbability of n‐PSi can be tuned from hours to months in physiological conditions. [ 23 ] The tunable bioresorbability of n‐PSi together with its biocompatibility and photoluminescence have enabled the preparation of drug‐loaded self‐reporting PSi nanoparticles for medical applications.…”

Section: Figurementioning

confidence: 99%

Peripheral Nanostructured Porous Silicon Boosts Static and Dynamic Performance of Integrated Electronic Devices

Paghi

Strambini

Toia

et al. 2020

Adv Elect Materials

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Porous silicon (PSi) is a nano-to microstructured form of silicon achieved by anodic etching of a conventional silicon wafer in acidic electrolytes. [20] Since the discovery of quantum-confinement room temperature luminescence from porous silicon, [21] nanostructured porous silicon (n-PSi) has greatly attracted the attention of researchers, who dreamed of an all-silicon photonics where electronic circuits and light emitting devices were integrated together in a silicon chip. [22] As the difficulties in increasing and stabilizing light emission of n-PSi LEDs soon became apparent, reports on the modulation of bulk-silicon properties (e.g., mechanical, thermal, electrical, optical, and biochemical) through reduction to its n-PSi form [23] have sustained porous silicon research over the following years, opening new opportunities toward unexpected applications. For instance, the thermal conductivity of n-PSi can be reduced over 3 decades with respect to that of crystalline silicon (c-Si). [23,24] The low thermal conductivity of n-PSi together with a reduced heat capacitance have enabled the fabrication of thermally induced ultrasonic transducers using n-PSi as a displacement-free (i.e., nonpiezoelectric) emitter. [25] The refractive index of n-PSi can be finely tuned from that of c-Si to that of air (almost). [26] The lower n-PSi refraction index, with respect to that of c-Si, has enabled the fabrication of label-free optical biosensors exploiting back-scattered n-PSi interferometers. [27-29] Bioresorbability of n-PSi can be tuned from hours to months in physiological conditions. [23] The tunable bioresorbability of n-PSi together with its biocompatibility and photoluminescence have enabled the preparation of drug-loaded self-reporting PSi nanoparticles for medical applications. [30,31] Among electrical properties, mobility and lifetime of charge carriers in n-PSi have been also reported to be tunable with respect to that of c-Si. [32,33] The mobility of charge carriers in n-PSi was shown to reduce down to a factor 10 6 with respect to that of bulk silicon. [32] The complex structural network of silicon nanocrystallites of n-PSi produces a strong spatial dispersion of drifting carriers over multiple paths different in length and geometry, which is responsible for the strong reduction of the mobility of both electrons and holes. [32] Recent fundamental studies on n-PSi further highlighted how the lifetime Nanomaterials hold the promise of revolutionizing electronics and, in turn, its applications, thanks to the unique properties of charge carriers traveling in structures with length scale down to a few nanometers. Here, the tremendous reduction of mobility and lifetime of charge carriers when traveling in randomly arranged nanostructured silicon crystallites, namely, nanostructured porous silicon (n-PSi), is leveraged to simultaneously improve the turn-off switching speed and reverse operation voltage of solid-state devices integrated nearby. As a proof-of-concept application, it is shown that the integration of periph...

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“…It is also true that organized arrays of nanoparticles (NPs) have been observed to exhibit complex emergent and metamaterial phenomena as a result of structural ordering, such as photonic band gaps, controlled electrical transport, and anisotropic mechanical behavior. Incorporating these phenomena into composites by dictating nanoparticle organization would further provide a means to tune the physical properties of a composite for various applications including tissue engineering, 1-3 sensing, [4][5][6][7] energy storage, 8,9 conductors, 10 and catalysis. [11][12][13] The development of methods for generating nanoscale organization of filler material is therefore critical for further progress in the field of composite materials science.…”

Section: Introductionmentioning

confidence: 99%

Ordered polymer composite materials: challenges and opportunities

2021

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Decoration of Porous Silicon with Gold Nanoparticles via Layer-by-Layer Nanoassembly for Interferometric and Hybrid Photonic/Plasmonic (Bio)sensing

Cited by 50 publications

References 59 publications

Hybrid Porous Silicon Biosensors Using Plasmonic and Fluorescent Nanomaterials: A Mini Review

Hybrid Porous Silicon Biosensors Using Plasmonic and Fluorescent Nanomaterials: A Mini Review

Peripheral Nanostructured Porous Silicon Boosts Static and Dynamic Performance of Integrated Electronic Devices

Ordered polymer composite materials: challenges and opportunities

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