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Di Giulio T, Corsi M, Gagliani F, De Benedetto G, Malitesta C, Mazzei A, Barca A, Verri T, Barillaro G, Mazzotta E. Reconfigurable Optical Sensor for Metal-Ion-Mediated Label-Free Recognition of Different Biomolecular Targets. ACS APPLIED MATERIALS & INTERFACES 2024; 16:43752-43761. [PMID: 39106976 PMCID: PMC11345716 DOI: 10.1021/acsami.4c08860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 08/09/2024]
Abstract
Reconfiguration of chemical sensors, intended as the capacity of the sensor to adapt to novel operational scenarios, e.g., new target analytes, is potentially game changing and would enable rapid and cost-effective reaction to dynamic changes occurring at healthcare, environmental, and industrial levels. Yet, it is still a challenge, and rare examples of sensor reconfiguration have been reported to date. Here, we report on a reconfigurable label-free optical sensor leveraging the versatile immobilization of metal ions through a chelating agent on a nanostructured porous silica (PSiO2) optical transducer for the detection of different biomolecules. First, we show the reversible grafting of different metal ions on the PSiO2 surface, namely, Ni2+, Cu2+, Zn2+, and Fe3+, which can mediate the interaction with different biomolecules and be switched under mild conditions. Then, we demonstrate reconfiguration of the sensor at two levels: 1) switching of the metal ions on the PSiO2 surface from Cu2+ to Zn2+ and testing the ability of Cu2+-functionalized and Zn2+-reconfigured devices for the sensing of the dipeptide carnosine (CAR), leveraging the well-known chelating ability of CAR toward divalent metal ions; and 2) reconfiguration of the Cu2+-functionalized PSiO2 sensor for a different target analyte, namely, the nucleotide adenosine triphosphate (ATP), switching Cu2+ with Fe3+ ions to exploit the interaction with ATP through phosphate groups. The Cu2+-functionalized and Zn2+-reconfigured sensors show effective sensing performance in CAR detection, also evaluated in tissue samples from murine brain, and so does the Fe3+-reconfigured sensor toward ATP, thus demonstrating effective reconfiguration of the sensor with the proposed surface chemistry.
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Affiliation(s)
- Tiziano Di Giulio
- Laboratorio
di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Martina Corsi
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, Via G. Caruso 16, 56122 Pisa, Italy
| | - Francesco Gagliani
- Laboratorio
di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Giuseppe De Benedetto
- Laboratorio
di Spettrometria di Massa Analitica ed Isotopica, Dipartimento di
Beni Culturali, Università del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Cosimino Malitesta
- Laboratorio
di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Aurora Mazzei
- Laboratorio
di Fisiologia Applicata, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Amilcare Barca
- Laboratorio
di Fisiologia Applicata, Dipartimento di Medicina Sperimentale (Di.Me.S), Università del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Tiziano Verri
- Laboratorio
di Fisiologia Applicata, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
| | - Giuseppe Barillaro
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, Via G. Caruso 16, 56122 Pisa, Italy
| | - Elisabetta Mazzotta
- Laboratorio
di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche
e Ambientali (Di.S.Te.B.A.), Università
del Salento, Via Monteroni, 73100 Lecce, Italy
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Awawdeh K, Buttkewitz MA, Bahnemann J, Segal E. Enhancing the performance of porous silicon biosensors: the interplay of nanostructure design and microfluidic integration. MICROSYSTEMS & NANOENGINEERING 2024; 10:100. [PMID: 39021530 PMCID: PMC11252414 DOI: 10.1038/s41378-024-00738-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/08/2024] [Accepted: 06/12/2024] [Indexed: 07/20/2024]
Abstract
This work presents the development and design of aptasensor employing porous silicon (PSi) Fabry‒Pérot thin films that are suitable for use as optical transducers for the detection of lactoferrin (LF), which is a protein biomarker secreted at elevated levels during gastrointestinal (GI) inflammatory disorders such as inflammatory bowel disease and chronic pancreatitis. To overcome the primary limitation associated with PSi biosensors-namely, their relatively poor sensitivity due to issues related to complex mass transfer phenomena and reaction kinetics-we employed two strategic approaches: First, we sought to optimize the porous nanostructure with respect to factors including layer thickness, pore diameter, and capture probe density. Second, we leveraged convection properties by integrating the resulting biosensor into a 3D-printed microfluidic system that also had one of two different micromixer architectures (i.e., staggered herringbone micromixers or microimpellers) embedded. We demonstrated that tailoring the PSi aptasensor significantly improved its performance, achieving a limit of detection (LOD) of 50 nM-which is >1 order of magnitude lower than that achieved using previously-developed biosensors of this type. Moreover, integration into microfluidic systems that incorporated passive and active micromixers further enhanced the aptasensor's sensitivity, achieving an additional reduction in the LOD by yet another order of magnitude. These advancements demonstrate the potential of combining PSi-based optical transducers with microfluidic technology to create sensitive label-free biosensing platforms for the detection of GI inflammatory biomarkers.
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Affiliation(s)
- Kayan Awawdeh
- Faculty of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, 320003 Haifa, Israel
| | - Marc A. Buttkewitz
- Institute of Technical Chemistry, Leibniz Universität Hannover, 30167 Hannover, Germany
| | - Janina Bahnemann
- Institute of Physics, University of Augsburg, 86159 Augsburg, Germany
- Centre for Advanced Analytics and Predictive Sciences (CAAPS), University of Augsburg, 86159 Augsburg, Germany
| | - Ester Segal
- Faculty of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, 320003 Haifa, Israel
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Paghi A, Mariani S, Corsi M, Maurina E, Debrassi A, Dähne L, Capaccioli S, Barillaro G. Ultrathin Ambipolar Polyelectrolyte Capacitors Prepared via Layer-by-Layer Assembling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309365. [PMID: 38268140 DOI: 10.1002/adma.202309365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/18/2024] [Indexed: 01/26/2024]
Abstract
Miniaturized solid state capacitors leveraging migration of unipolar ions in a single polyelectrolyte layer sandwiched between metal electrodes, namely, polyelectrolyte capacitors (PECs), have been recently reported with areal capacitance up to 100-200 nF mm-2. Nonetheless, application of PECs in consumer and industrial electronics has been hindered so far by their small operational frequency range, up to a few kHz, due to the resistive behavior (phase angle >-45°) of PECs in the range kHz-to-MHz. Here, it is reported on multilayer polyelectrolyte capacitors (mPECs) that leverage as dielectric an ambipolar nanometer-thick (down to 10 nm) stack of anionic and cationic polyelectrolytes assembled layer-by-layer between metal electrodes to eliminate the resistive behavior at frequencies from kHz to MHz. This significantly extends the operational range of mPECs over PECs. mPECs with areal capacitance as high as 25 nF mm-2 at 20 Hz and full capacitive behavior from 100 mHz to 10 MHz are demonstrated using different assembling conditions and anionic/cationic polyelectrolyte pairs. The mPECs reliably operate over time for >300 million cycles, at different biasing voltages up to 3 V, and temperatures up to 80 °C, showing a reversible capacitive behavior without significant hysteresis. Application of mPECs in flexible electronics, also operating at high frequency, is envisaged.
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Affiliation(s)
- Alessandro Paghi
- Dipartimento di Ingegneria dell'Informazione, Università di Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Stefano Mariani
- Dipartimento di Ingegneria dell'Informazione, Università di Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Martina Corsi
- Dipartimento di Ingegneria dell'Informazione, Università di Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Elena Maurina
- Dipartimento di Ingegneria dell'Informazione, Università di Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Aline Debrassi
- Surflay Nanotec GmbH, Max-Planck-Straße 3, 12489, Berlin, Germany
| | - Lars Dähne
- Surflay Nanotec GmbH, Max-Planck-Straße 3, 12489, Berlin, Germany
| | - Simone Capaccioli
- Physics Department, University of Pisa, Largo Pontecorvo 3, Pisa, I-56127, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, I-56126, Italy
| | - Giuseppe Barillaro
- Dipartimento di Ingegneria dell'Informazione, Università di Pisa, via G. Caruso 16, Pisa, 56122, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, Pisa, I-56126, Italy
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Mazzotta E, Di Giulio T, Mariani S, Corsi M, Malitesta C, Barillaro G. Vapor-Phase Synthesis of Molecularly Imprinted Polymers on Nanostructured Materials at Room-Temperature. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302274. [PMID: 37222612 DOI: 10.1002/smll.202302274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/27/2023] [Indexed: 05/25/2023]
Abstract
Molecularly imprinted polymers (MIPs) have recently emerged as robust and versatile artificial receptors. MIP synthesis is carried out in liquid phase and optimized on planar surfaces. Application of MIPs to nanostructured materials is challenging due to diffusion-limited transport of monomers within the nanomaterial recesses, especially when the aspect ratio is >10. Here, the room temperature vapor-phase synthesis of MIPs in nanostructured materials is reported. The vapor phase synthesis leverages a >1000-fold increase in the diffusion coefficient of monomers in vapor phase, compared to liquid phase, to relax diffusion-limited transport and enable the controlled synthesis of MIPs also in nanostructures with high aspect ratio. As proof-of-concept application, pyrrole is used as the functional monomer thanks to its large exploitation in MIP preparation; nanostructured porous silicon oxide (PSiO2 ) is chosen to assess the vapor-phase deposition of PPy-based MIP in nanostructures with aspect ratio >100; human hemoglobin (HHb) is selected as the target molecule for the preparation of a MIP-based PSiO2 optical sensor. High sensitivity and selectivity, low detection limit, high stability and reusability are achieved in label-free optical detection of HHb, also in human plasma and artificial serum. The proposed vapor-phase synthesis of MIPs is immediately transferable to other nanomaterials, transducers, and proteins.
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Affiliation(s)
- Elisabetta Mazzotta
- Laboratory of Analytical Chemistry, Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, via Monteroni, Lecce, 73100, Italy
| | - Tiziano Di Giulio
- Laboratory of Analytical Chemistry, Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, via Monteroni, Lecce, 73100, Italy
| | - Stefano Mariani
- Information Engineering Department, University of Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Martina Corsi
- Information Engineering Department, University of Pisa, via G. Caruso 16, Pisa, 56122, Italy
| | - Cosimino Malitesta
- Laboratory of Analytical Chemistry, Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, via Monteroni, Lecce, 73100, Italy
| | - Giuseppe Barillaro
- Information Engineering Department, University of Pisa, via G. Caruso 16, Pisa, 56122, Italy
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Wang Z, Chen W, Liu X, Lin S, Deng B, Shen J, Li F, Zhu J. Plasmonic metasurface enhanced by nanobumps for label-free biosensing of lung tumor markers in serum. Talanta 2023; 264:124731. [PMID: 37285700 DOI: 10.1016/j.talanta.2023.124731] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/09/2023] [Accepted: 05/23/2023] [Indexed: 06/09/2023]
Abstract
Plasmonic metasurface biosensing has excellent potential in label-free detection of tumor biomarkers. In general, a variety of plasmonic metasurface nanofabrication leads to various degree of metallic surface roughness. However, the metasurface roughness effects on plasmonic sensing of tumor markers have been barely reported. Here we fabricate high-roughness (HR) gold nanohole metasurfaces with nanobumps and investigate their biosensing in comparison with the low-roughness (LR) counterparts. The HR metasurfaces demonstrate the surface sensitivity of multilayer polyelectrolyte molecules, which is 57.0% higher than the LR ones. The HR metasurfaces also illuminate higher immunoassay sensitivity to multiple lung cancer biomarkers, including carcinoembryonic antigen, neuron-specific enolase and cytokeratin fragment 21-1. The highest increasement of tumor marker sensitivity is up to 71.4%. The biosensing enhancement is attributed to the introduction of gold nanobumps on metasurfaces, which provides more hot-spot regions, higher localized near-field intensity and better optical impedance matching. Furthermore, the biosensing of HR metasurfaces effectively covers the threshold values of tumor markers for early lung cancer diagnosis, and is used for the detection of clinical serum samples. The testing deviation is less than 4% compared with commercial immunoassay, which implies promising applications on medical examinations. Our research provides a scientific guide to surface roughness engineering for plasmonic metasensing in the future point-of-care testing.
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Affiliation(s)
- Zhenbiao Wang
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China; Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Wei Chen
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Xueying Liu
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Shaowei Lin
- The First Affiliated Hospital of Xiamen University, Xiamen, 361003, China
| | - Baichang Deng
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Jiaqing Shen
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Fajun Li
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Jinfeng Zhu
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China; Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China.
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Carneiro P, Loureiro JA, Delerue-Matos C, Morais S, Pereira MDC. Nanostructured label–free electrochemical immunosensor for detection of a Parkinson's disease biomarker. Talanta 2023; 252:123838. [DOI: 10.1016/j.talanta.2022.123838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/02/2022] [Accepted: 08/08/2022] [Indexed: 10/15/2022]
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Wang L, Wan Y, Ma N, Zhou L, Zhao D, Yu J, Wang H, Lin Z, Qian W. Real-time kinetics and affinity analysis of the interaction between protein A and immunoglobulins G derived from different species on silica colloidal crystal films. Colloids Surf B Biointerfaces 2022; 219:112839. [PMID: 36137338 DOI: 10.1016/j.colsurfb.2022.112839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/24/2022] [Accepted: 09/10/2022] [Indexed: 10/31/2022]
Abstract
Kinetic and affinity analysis of protein interactions reveals information on their related activities in biological processes. Herein, we established a system for evaluating the kinetics and affinity of the interaction between protein A and various IgG species on the surface of silica spheres of silica colloidal crystal (SCC) films by the extraordinary optical interference capabilities of 190 nm silica spheres after self-assembly. The equilibrium association constant (KA) was calculated by the equilibrium Langmuir model and nonlinear least-squares analysis of time-dependent data. The relative protein A/IgG binding affinity is human > rabbit >cow >goat. In addition, the competitive interaction of distinct species of IgG with protein A at the interface of SCC films was studied and performed. These findings may help with the use of protein A and other recognition components in a number of sensor types. Furthermore, this research might offer a novel approach to determining the kinetics and affinity of proteins on the surface of spheres particles, which may contribute to the development of the application of spheres particles in pharmaceutical science, biomedical engineering, and other techniques.
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Affiliation(s)
- Lu Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yizhen Wan
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Ning Ma
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Lele Zhou
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Dongmin Zhao
- Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jianning Yu
- Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Huili Wang
- Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Zhiping Lin
- Nanjing Weigang Dairy Co., Ltd., Nanjing 211102, China
| | - Weiping Qian
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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Iadanza S, Mendoza-Castro JH, Oliveira T, Butler SM, Tedesco A, Giannino G, Lendl B, Grande M, O’Faolain L. High-Q asymmetrically cladded silicon nitride 1D photonic crystals cavities and hybrid external cavity lasers for sensing in air and liquids. NANOPHOTONICS 2022; 11:4183-4196. [PMID: 36147699 PMCID: PMC9412843 DOI: 10.1515/nanoph-2022-0245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/01/2022] [Indexed: 05/13/2023]
Abstract
In this paper we show a novel design of high Q-factor silicon nitride (SiN) 1D photonic crystal (PhC) cavities side-coupled to curved waveguides, operating with both silica and air cladding. The engineering of the etched 1D PhC cavity sidewalls angle allows for high Q-factors over a wide range of upper cladding compositions, and the achievement of the highest calculated Q-factor for non-suspended asymmetric SiN PhC structures. We show the employment of these type of SiN PhC cavities in hybrid external cavity laser (HECL) configuration, with mode-hop free single mode laser operation over a broad range of injected currents (from 25 mA to 65 mA), milliwatts of power output (up to 9 mW) and side-mode suppression ratios in the range of 40 dB. We demonstrate the operation of these devices as compact and energy efficient optical sensors that respond to refractive index changes in the surrounding medium the measurement of sodium chloride (from 0% to 25%) and sucrose (from 0% to 25%) in aqueous solution. In HECL configuration, the RI sensor exhibits a 2 orders of magnitude improvement in detection limit compared to the passive microcavity. We also discuss the possibility for applying these devices as novel transducers for refractive index changes that are induced by analyte specific absorption of infrared radiation by the target analytes present in gas or liquid phase.
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Affiliation(s)
- Simone Iadanza
- Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland
- Munster Technological University, Rossa Avenue, Bishopstown, Cork, Ireland
| | - Jesus Hernan Mendoza-Castro
- DEI, Politecnico di Bari, Via Amendola 126/b, Bari, Italy
- TUW, Institute of Chemical Technologies and Analytics, Getreidemarkt 9/164, 1060Vienna, Austria
| | - Taynara Oliveira
- Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland
- Munster Technological University, Rossa Avenue, Bishopstown, Cork, Ireland
| | - Sharon M. Butler
- Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland
| | | | | | - Bernhard Lendl
- TUW, Institute of Chemical Technologies and Analytics, Getreidemarkt 9/164, 1060Vienna, Austria
| | - Marco Grande
- DEI, Politecnico di Bari, Via Amendola 126/b, Bari, Italy
| | - Liam O’Faolain
- Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland
- Munster Technological University, Rossa Avenue, Bishopstown, Cork, Ireland
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Ko WY, Yeh SC, Chu HW, Hsu YC, Lin KJ. High-porosity hybrid bilayer-enabled portable LED plasmonic biosensing. Chem Commun (Camb) 2022; 58:10154-10157. [PMID: 35993166 DOI: 10.1039/d2cc03757b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A TiO2-nanowire/Au-nanoparticle hybrid layer, possessing nanocavities and a plasmonic metasurface, can accomplish an entire visible region absorbance, inducing remarkable photocurrent-extraction efficiency. A blood-glucose strip-like testing protocol assembled using this layer allows nondestructive quantitative alpha-fetoprotein detection in human serum under homemade visible LED illumination, indicating its potential in commercial point-of-care testing applications.
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Affiliation(s)
- Wen-Yin Ko
- Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.
| | - Shin-Chwen Yeh
- Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.
| | - Hsiao-Wen Chu
- Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.
| | - Yun-Chen Hsu
- Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.
| | - Kuan-Jiuh Lin
- Department of Chemistry, National Chung-Hsing University, Taichung 402, Taiwan.
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Kurylo I, Demoustier-Champagne S, Dupont-Gillain C. Effect of nanoconfinement on the enzymatic activity of bioactive layer-by-layer assemblies in nanopores. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Corsi M, Paghi A, Mariani S, Golinelli G, Debrassi A, Egri G, Leo G, Vandini E, Vilella A, Dähne L, Giuliani D, Barillaro G. Bioresorbable Nanostructured Chemical Sensor for Monitoring of pH Level In Vivo. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202062. [PMID: 35618637 PMCID: PMC9353472 DOI: 10.1002/advs.202202062] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 06/15/2023]
Abstract
Here, the authors report on the manufacturing and in vivo assessment of a bioresorbable nanostructured pH sensor. The sensor consists of a micrometer-thick porous silica membrane conformably coated layer-by-layer with a nanometer-thick multilayer stack of two polyelectrolytes labeled with a pH-insensitive fluorophore. The sensor fluorescence changes linearly with the pH value in the range 4 to 7.5 upon swelling/shrinking of the polymer multilayer and enables performing real-time measurements of the pH level with high stability, reproducibility, and accuracy, over 100 h of continuous operation. In vivo studies carried out implanting the sensor in the subcutis on the back of mice confirm real-time monitoring of the local pH level through skin. Full degradation of the pH sensor occurs in one week from implant in the animal model, and its biocompatibility after 2 months is confirmed by histological and fluorescence analyses. The proposed approach can be extended to the detection of other (bio)markers in vivo by engineering the functionality of one (at least) of the polyelectrolytes with suitable receptors, thus paving the way to implantable bioresorbable chemical sensors.
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Affiliation(s)
- Martina Corsi
- Dipartimento di Ingegneria dell'InformazioneUniversità di Pisavia G. Caruso 16Pisa56122Italy
| | - Alessandro Paghi
- Dipartimento di Ingegneria dell'InformazioneUniversità di Pisavia G. Caruso 16Pisa56122Italy
| | - Stefano Mariani
- Dipartimento di Ingegneria dell'InformazioneUniversità di Pisavia G. Caruso 16Pisa56122Italy
| | - Giulia Golinelli
- Department of Medical and Surgical Sciences for Children & AdultsUniversity‐Hospital of Modena and Reggio EmiliaVia del Pozzo 71Modena41124Italy
| | - Aline Debrassi
- Surflay Nanotec GmbHMax‐Planck‐Straße 312489BerlinGermany
| | - Gabriella Egri
- Surflay Nanotec GmbHMax‐Planck‐Straße 312489BerlinGermany
| | - Giuseppina Leo
- Department of Biomedical Metabolic and Neural SciencesUniversity of Modena and Reggio Emiliavia G. Campi 287Modena41125Italy
| | - Eleonora Vandini
- Department of Biomedical Metabolic and Neural SciencesUniversity of Modena and Reggio Emiliavia G. Campi 287Modena41125Italy
| | - Antonietta Vilella
- Department of Biomedical Metabolic and Neural SciencesUniversity of Modena and Reggio Emiliavia G. Campi 287Modena41125Italy
| | - Lars Dähne
- Surflay Nanotec GmbHMax‐Planck‐Straße 312489BerlinGermany
| | - Daniela Giuliani
- Department of Biomedical Metabolic and Neural SciencesUniversity of Modena and Reggio Emiliavia G. Campi 287Modena41125Italy
| | - Giuseppe Barillaro
- Dipartimento di Ingegneria dell'InformazioneUniversità di Pisavia G. Caruso 16Pisa56122Italy
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12
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Wang L, Wang X, Chen Z, Liu S. Electrochemical DNA Scaffold-Based Sensing Platform for Multiple Modes of Protein Assay and a Keypad Lock System. Anal Chem 2022; 94:8317-8326. [PMID: 35649122 DOI: 10.1021/acs.analchem.2c00800] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Development of a flexible, easy-to-use, and well-controllable DNA-based sensing platform would provide enormous opportunities to boost molecular diagnosis and signal transduction or information processing. Herein, a duplex DNA scaffold containing a bulge was deployed for the fabrication of a simple and general DNA-based electrochemical sensing platform. It could be harnessed for different signal output behaviors (one signal-off and two signal-on modes) toward a single-step analysis of the target protein. The detection limit toward the target protein could reach about 0.1 nM. Also, it could be used as a streamlined electrochemical workflow for the successive monitoring of protein binding. Furthermore, such an electrochemical sensing platform could be explored for the operation of the concatenated AND logic gates as a molecular keypad lock system. The current sensing platform based on only one duplex DNA scaffold presented features such as simple biosensor design and fabrication, flexible operation for different signal outputs, sensitive and selective protein detection, and expandable logic operation. It thus would pave a broad road toward the development of high-performance biosensors or logic devices to be applied for molecular diagnosis or computing.
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Affiliation(s)
- Li Wang
- College of Chemistry and Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai 264005, China
| | - Xu Wang
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao 266042, China
| | - Zhiqiang Chen
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao 266042, China
| | - Shufeng Liu
- College of Chemistry and Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai 264005, China
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13
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Wu L, Li X, Miao H, Xu J, Pan G. State of the art in development of molecularly imprinted biosensors. VIEW 2022. [DOI: 10.1002/viw.20200170] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Licheng Wu
- Sino‐European School of Technology of Shanghai University Shanghai University Shanghai China
| | - Xiaolei Li
- Sino‐European School of Technology of Shanghai University Shanghai University Shanghai China
| | - Haohan Miao
- Institute for Advanced Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang Jiangsu China
| | - Jingjing Xu
- Sino‐European School of Technology of Shanghai University Shanghai University Shanghai China
| | - Guoqing Pan
- Institute for Advanced Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang Jiangsu China
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14
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Guo K, Alba M, Chin GP, Tong Z, Guan B, Sailor MJ, Voelcker NH, Prieto-Simón B. Designing Electrochemical Biosensing Platforms Using Layered Carbon-Stabilized Porous Silicon Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2022; 14:15565-15575. [PMID: 35286082 PMCID: PMC9682479 DOI: 10.1021/acsami.2c02113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Porous silicon (pSi) is an established porous material that offers ample opportunities for biosensor design thanks to its tunable structure, versatile surface chemistry, and large surface area. Nonetheless, its potential for electrochemical sensing is relatively unexplored. This study investigates layered carbon-stabilized pSi nanostructures with site-specific functionalities as an electrochemical biosensor. A double-layer nanostructure combining a top hydrophilic layer of thermally carbonized pSi (TCpSi) and a bottom hydrophobic layer of thermally hydrocarbonized pSi (THCpSi) is prepared. The modified layers are formed in a stepwise process, involving first an electrochemical anodization step to generate a porous layer with precisely defined pore morphological features, followed by deposition of a thin thermally carbonized coating on the pore walls via temperature-controlled acetylene decomposition. The second layer is then generated beneath the first by following the same two-step process, but the acetylene decomposition conditions are adjusted to deposit a thermally hydrocarbonized coating. The double-layer platform features excellent electrochemical properties such as fast electron-transfer kinetics, which underpin the performance of a TCpSi-THCpSi voltammetric DNA sensor. The biosensor targets a 28-nucleotide single-stranded DNA sequence with a detection limit of 0.4 pM, two orders of magnitude lower than the values reported to date by any other pSi-based electrochemical DNA sensor.
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Affiliation(s)
- Keying Guo
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
| | - Maria Alba
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Clayton, Victoria 3168, Australia
| | - Grace Pei Chin
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
| | - Ziqiu Tong
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
| | - Bin Guan
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
| | - Michael J. Sailor
- Department
of Chemistry and Biochemistry and Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Nicolas H. Voelcker
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Clayton, Victoria 3168, Australia
| | - Beatriz Prieto-Simón
- Department
of Electronic Engineering, Universitat Rovira
i Virgili, Tarragona 43007, Spain
- ICREA, Pg. Lluís Companys 23, Barcelona 08010, Spain
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15
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Wafer-Scale Fabrication and Transfer of Porous Silicon Films as Flexible Nanomaterials for Sensing Application. NANOMATERIALS 2022; 12:nano12071191. [PMID: 35407309 PMCID: PMC9000722 DOI: 10.3390/nano12071191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/16/2022] [Accepted: 03/26/2022] [Indexed: 12/30/2022]
Abstract
Flexible sensors are highly advantageous for integration in portable and wearable devices. In this work, we propose and validate a simple strategy to achieve whole wafer-size flexible SERS substrate via a one-step metal-assisted chemical etching (MACE). A pre-patterning Si wafer allows for PSi structures to form in tens of microns areas, and thus enables easy detachment of PSi film pieces from bulk Si substrates. The morphology, porosity, and pore size of PS films can be precisely controlled by varying the etchant concentration, which shows obvious effects on film integrity and wettability. The cracks and self-peeling of Psi films can be achieved by the drying conditions after MACE, enabling transfer of Psi films from Si wafer to any substrates, while maintaining their original properties and vertical alignment. After coating with a thin layer of silver (Ag), the rigid and flexible PSi films before and after transfer both show obvious surface-enhanced Raman scattering (SERS) effect. Moreover, flexible PSi films SERS substrates have been demonstrated with high sensitivity (down to 2.6 × 10−9 g/cm2) for detection of methyl parathion (MPT) residues on a curved apple surface. Such a method provides us with quick and high throughput fabrication of nanostructured materials for sensing, catalysis, and electro-optical applications.
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16
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Li F, Shen J, Guan C, Xie Y, Wang Z, Lin S, Chen J, Zhu J. Exploring near-field sensing efficiency of complementary plasmonic metasurfaces for immunodetection of tumor markers. Biosens Bioelectron 2022; 203:114038. [PMID: 35121450 DOI: 10.1016/j.bios.2022.114038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/14/2022]
Abstract
Plasmonic metasurface biosensors have great potential on label-free high-throughput clinical detection of human tumor markers. In the past decades, nanopillar and nanohole metasurfaces have become the common choices for plasmonic biosensing, because they typically enable universal simple large-area nanopatterns via a low-cost reproducible fabrication manner. The two kinds of metasurfaces have the complementary shapes and are used to be assumed as the same type of two-dimensional plasmonic nanograting for biosensing. Up to date, there is still a lack of comparison study on their biosensing performance, which is critical to guide their better applications on tumor marker detection. In this study, we compare the bulk/surface refractive index and sensitivity of plasmonic nanopillar (PNP) and plasmonic nanohole (PNH) metasurfaces in order to evaluate their biosensing capabilities. The sensing physics about their space near-field utilization is systematically revealed. The PNH metasurface demonstrates a higher biomolecule sensitivity versus the complementary PNP metasurface, and its limit of detection for bovine serum albumin reaches ∼0.078 ng/mL, which implies a greater potential of detecting cancer biomarkers. We further adopt the PNH metasurfaces for immunoassay of three typical tumor markers by testing clinical human serum samples. The results imply that the immunodetection of alpha-fetoprotein has the most optimal sensing efficiency with the lowest detection concentration (<5 IU/mL), which is much lower than its clinical diagnosis threshold of ∼16.5 IU/mL for medical examination. Our work has not only illuminated the distinct biosensing properties of complementary metasurfaces, but also provided a promising way to boost plasmonic biosensing for point-of-care testing.
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Affiliation(s)
- Fajun Li
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China; State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - Jiaqing Shen
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Chaoheng Guan
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Yinong Xie
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Zhenbiao Wang
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China
| | - Shaowei Lin
- The First Affiliated Hospital of Xiamen University, Xiamen, 361003, China
| | - Junjie Chen
- Analysis and Measurement Center, School of Pharmaceutical Science, Xiamen University, Xiamen, 361003, China
| | - Jinfeng Zhu
- Institute of Electromagnetics and Acoustics and Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen University, Xiamen, 361005, China; State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China.
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17
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Chen Y, Li W, Li J, Zhuo S, Jiao S, Wang S, Sun J, Li Q, Zheng T. Stable three-dimensional porous silicon-carbon-gold composite film for enrichment and directly electrochemical detection of bisphenol A. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Kartashova AD, Gonchar KA, Chermoshentsev DA, Alekseeva EA, Gongalsky MB, Bozhev IV, Eliseev AA, Dyakov SA, Samsonova JV, Osminkina LA. Surface-Enhanced Raman Scattering-Active Gold-Decorated Silicon Nanowire Substrates for Label-Free Detection of Bilirubin. ACS Biomater Sci Eng 2021; 8:4175-4184. [PMID: 34775760 DOI: 10.1021/acsbiomaterials.1c00728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Bilirubin (BR) is a product of hemoglobin breakdown, and its increasing levels in the blood may indicate liver disorders and lead to jaundice. Kernicterus is most dangerous in newborns when the unconjugated BR concentration can quickly rise to toxic levels, causing neurological damage and even death. The development of an accurate, fast, and sensitive sensor for BR detection will help reduce diagnostic time and ensure successful treatment. In this study, we propose a new method for creating a surface-enhanced Raman scattering (SERS)-active substrate based on gold-decorated silicon nanowires (Au@SiNWs) for sensitive label-free BR detection. Gold-assisted chemical etching of crystalline silicon wafers was used to synthesize SiNWs, the tops of which were then additionally decorated with gold nanoparticles. The low detection limit of model analyte 4-mercaptopyridine down to the concentration of 10-8 M demonstrated the excellent sensitivity of the obtained substrates for SERS application. The theoretical full-wave electromagnetic simulations of Raman scattering in the Au@SiNW substrates showed that the major contribution to the total SERS signal comes from the analyte molecules located on the SiNW surface near the gold nanoparticles. Therefore, for efficient BR adsorption and SERS detection, the surface of the SiNWs was modified with amino groups. Label-free detection of BR using amino modified Au@SiNWs with high point-to-point, scan-to-scan, and batch-to-batch reproducibility with a detection limit of 10-6 M has been demonstrated. Artificial urine, mimicking human urine samples, was used as the matrix to get insights into the influence of different parameters such as matrix complexity on the overall BR SERS signal. The signal stability was demonstrated for 7 days after adsorption of BR with a concentration of 5 × 10-5 M, which is the required sensitivity for clinical applications.
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Affiliation(s)
- Anna D Kartashova
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Kirill A Gonchar
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Dmitry A Chermoshentsev
- Skolkovo Institute of Science and Technology, Center for Photonics and Quantum Materials, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russia.,Moscow Institute of Physics and Technology, Institutskiy pereulok 9, 141701 Moscow, Russia.,Russian Quantum Center, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russian Federation
| | - Ekaterina A Alekseeva
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Maxim B Gongalsky
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia
| | - Ivan V Bozhev
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Quantum Technology Center, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia
| | - Andrei A Eliseev
- Lomonosov Moscow State University, Faculty of Chemistry, Leninskie Gory 1, 119991 Moscow, Russia
| | - Sergey A Dyakov
- Skolkovo Institute of Science and Technology, Center for Photonics and Quantum Materials, Bolshoy Boulevard 30, bld. 1, 143025 Moscow, Russia
| | - Jeanne V Samsonova
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Lomonosov Moscow State University, Faculty of Chemistry, Leninskie Gory 1, 119991 Moscow, Russia
| | - Liubov A Osminkina
- Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1, 119991 Moscow, Russia.,Institute for Biological Instrumentation of Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
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19
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Oh JH, Kang RH, Kim J, Bang EK, Kim D. Thermally induced silane dehydrocoupling on porous silicon nanoparticles for ultra-long-acting drug release. NANOSCALE 2021; 13:15560-15568. [PMID: 34596178 DOI: 10.1039/d1nr03263a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Here, we report an ultra-long-acting drug release nano-formulation based on porous silicon nanoparticles (pSiNPs) that are prepared by thermally induced silane dehydrocoupling and lipid-coating. This robust formulation offers the ability to release an anticancer drug, for up to 2 weeks, in various biological environments; pH 7.4 buffer, cancer cells, and tumor xenograft model.
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Affiliation(s)
- Ji Hyeon Oh
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Rae Hyung Kang
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Jaehoon Kim
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Eun-Kyoung Bang
- Creative Research Center for Brain Science, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Dokyoung Kim
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
- Center for Converging Humanities, Kyung Hee University, Seoul 02447, Republic of Korea
- Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, Kyung Hee University, Seoul 02447, Republic of Korea
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20
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Yılmaz Aykut D, Yolaçan Ö, Kaşgöz H, Deligoz H. Tunable safranine T release from LbL films of single/blend polyanions. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04883-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Ermatov T, Novoselova M, Skibina J, Machnev A, Gorin D, Noskov RE. Ultrasmooth, biocompatible, and removable nanocoating for hollow-core microstructured optical fibers. OPTICS LETTERS 2021; 46:4828-4831. [PMID: 34598210 DOI: 10.1364/ol.436220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
Functional nanocoatings of hollow-core microstructured optical fibers (HC-MOFs) have extended the domain of their applications to biosensing and photochemistry. However, novel modalities typically come with increased optical losses since a significant surface roughness of functional layers gives rise to additional light scattering, restricting the performance of functionalization. Here, the technique that enables a biocompatible and removable nanocoating of HC-MOFs with low surface roughness is presented. The initial functional film is formed by a layer-by-layer assembly of bovine serum albumin (BSA) and tannic acid (TA). The alkaline etching at pH 9 results in the reduction of surface roughness from 26 nm to 3 nm and decreases fiber optical losses by three times. The nanocoating can be fully removed within 7 min of the treatment. Natural biocompatibility of BSA alongside antibacterial and antifouling properties of TA makes the presented nanocoating promising for biophotonic applications.
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22
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Bismuth M, Zaltzer E, Muthukumar D, Suckeveriene R, Shtenberg G. Real-time detection of copper contaminants in environmental water using porous silicon Fabry-Pérot interferometers. Analyst 2021; 146:5160-5168. [PMID: 34286718 DOI: 10.1039/d1an00701g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Water sources are vulnerable to intentional and inadvertent human pollution with thousands of synthetic and geogenic trace contaminants, posing long-term effects on the aquatic ecosystem and human health. Thus, early and rapid detection of water pollutants followed by corrective and preventive actions can lead to the reduction of the overall polluting impact to safeguard public health. This study presents a generic sensing assay for the label-free detection of copper contaminants in environmental water samples using multilayered polyethylenimine (PEI) functionalized porous silicon Fabry-Pérot interferometers. The selective chelating activity of PEI thin-films was monitored in real-time by reflective interferometric Fourier transform spectroscopy (RIFTS) while assessing the improved optical responses. The optimized scaffold of two sequential PEI layers depicted a linear working range between 0.2 and 2 ppm while presenting a detection limit of 0.053 ppm (53 ppb). The specificity of the developed platform was cross-validated against various metallic pollutants and cations commonly found in water bodies (i.e., Cd2+, Pb2+, Cr3+, Fe3+, Mg2+, Ca2+, Zn2+, K+ and Al3+). Finally, as a proof of concept, the analytical performance of the porous interferometers for real-life scenarios was demonstrated in three water samples (tap, ground and irrigation), presenting sufficient adaptability to complex matrix analysis with recovery values of 85-106%. Overall, the developed sensing concept offers an efficient, rapid and label-free methodology that can be potentially adopted for routine on-site detection using a simple and portable device.
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Affiliation(s)
- Mike Bismuth
- Life Sciences and Nanotechnology, Bar Ilan University, Ramat-Gan, Israel
| | - Eytan Zaltzer
- Epidemiology and Preventive Medicine, School of Public Health - Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Divagar Muthukumar
- Institute of Agricultural Engineering, ARO, The Volcani Center, Bet Dagan, Israel.
| | - Ran Suckeveriene
- Department of Water Industry Engineering, Kinneret Academic College, Israel
| | - Giorgi Shtenberg
- Institute of Agricultural Engineering, ARO, The Volcani Center, Bet Dagan, Israel.
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23
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Choi KW, Kim JW, Kwon TS, Kang SW, Song JI, Park YT. Mechanically Sustainable Starch-Based Flame-Retardant Coatings on Polyurethane Foams. Polymers (Basel) 2021; 13:polym13081286. [PMID: 33920820 PMCID: PMC8071101 DOI: 10.3390/polym13081286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/03/2021] [Accepted: 04/09/2021] [Indexed: 11/29/2022] Open
Abstract
The use of halogen-based materials has been regulated since toxic substances are released during combustion. In this study, polyurethane foam was coated with cationic starch (CS) and montmorillonite (MMT) nano-clay using a spray-assisted layer-by-layer (LbL) assembly to develop an eco-friendly, high-performance flame-retardant coating agent. The thickness of the CS/MMT coating layer was confirmed to have increased uniformly as the layers were stacked. Likewise, a cone calorimetry test confirmed that the heat release rate and total heat release of the coated foam decreased by about 1/2, and a flame test showed improved fire retardancy based on the analysis of combustion speed, flame size, and residues of the LbL-coated foam. More importantly, an additional cone calorimeter test was performed after conducting more than 1000 compressions to assess the durability of the flame-retardant coating layer when applied in real life, confirming the durability of the LbL coating by the lasting flame retardancy.
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Affiliation(s)
- Kyung-Who Choi
- School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76 Hanggongdaehak-ro, Deogyang-gu, Goyang-si 10540, Gyeonggi-do, Korea;
| | - Jun-Woo Kim
- Department of Mechanical Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin 17058, Gyeonggi-do, Korea;
| | - Tae-Soon Kwon
- Korea Railroad Research Institute, 176 Cheoldo bangmulgwan-ro, Uiwang-si 16105, Gyeonggi-do, Korea;
| | - Seok-Won Kang
- Department of Automotive Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Gyeongsangbuk-do, Korea;
| | - Jung-Il Song
- Department of Mechanical Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon 51140, Gyeongsangnam-do, Korea;
| | - Yong-Tae Park
- Department of Mechanical Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin 17058, Gyeonggi-do, Korea;
- Correspondence: ; Tel.: +82-31-330-6343
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24
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Leonardi AA, Lo Faro MJ, Irrera A. Biosensing platforms based on silicon nanostructures: A critical review. Anal Chim Acta 2021; 1160:338393. [PMID: 33894957 DOI: 10.1016/j.aca.2021.338393] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 12/21/2022]
Abstract
Biosensors are revolutionizing the health-care systems worldwide, permitting to survey several diseases, even at their early stage, by using different biomolecules such as proteins, DNA, and other biomarkers. However, these sensing approaches are still scarcely diffused outside the specialized medical and research facilities. Silicon is the undiscussed leader of the whole microelectronics industry, and novel sensors based on this material may completely change the health-care scenario. In this review, we will show how novel sensing platforms based on Si nanostructures may have a disruptive impact on applications with a real commercial transfer. A critical study for the main Si-based biosensors is herein presented with a comparison of their advantages and drawbacks. The most appealing sensing devices are discussed, starting from electronic transducers, with Si nanowires field-effect transistor (FET) and porous Si, to their optical alternatives, such as effective optical thickness porous silicon, photonic crystals, luminescent Si quantum dots, and finally luminescent Si NWs. All these sensors are investigated in terms of working principle, sensitivity, and selectivity with a specific focus on the possibility of their industrial transfer, and which ones may be preferred for a medical device.
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Affiliation(s)
- Antonio Alessio Leonardi
- Dipartimento di Fisica e Astronomia "Ettore Majorana", Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy; CNR-IMM UoS Catania, Istituto per La Microelettronica e Microsistemi, Via Santa Sofia 64, Italy; CNR-IPCF, Istituto per I Processi Chimico-Fisici, Viale F. Stagno D'Alcontres 37, 98158, Messina, Italy
| | - Maria José Lo Faro
- Dipartimento di Fisica e Astronomia "Ettore Majorana", Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy; CNR-IMM UoS Catania, Istituto per La Microelettronica e Microsistemi, Via Santa Sofia 64, Italy
| | - Alessia Irrera
- CNR-IPCF, Istituto per I Processi Chimico-Fisici, Viale F. Stagno D'Alcontres 37, 98158, Messina, Italy.
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25
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Towards explicit regulating-ion-transport: nanochannels with only function-elements at outer-surface. Nat Commun 2021; 12:1573. [PMID: 33692350 PMCID: PMC7946920 DOI: 10.1038/s41467-021-21507-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 01/13/2021] [Indexed: 01/07/2023] Open
Abstract
Function elements (FE) are vital components of nanochannel-systems for artificially regulating ion transport. Conventionally, the FE at inner wall (FEIW) of nanochannel−systems are of concern owing to their recognized effect on the compression of ionic passageways. However, their properties are inexplicit or generally presumed from the properties of the FE at outer surface (FEOS), which will bring potential errors. Here, we show that the FEOS independently regulate ion transport in a nanochannel−system without FEIW. The numerical simulations, assigned the measured parameters of FEOS to the Poisson and Nernst-Planck (PNP) equations, are well fitted with the experiments, indicating the generally explicit regulating-ion-transport accomplished by FEOS without FEIW. Meanwhile, the FEOS fulfill the key features of the pervious nanochannel systems on regulating-ion-transport in osmotic energy conversion devices and biosensors, and show advantages to (1) promote power density through concentrating FE at outer surface, bringing increase of ionic selectivity but no obvious change in internal resistance; (2) accommodate probes or targets with size beyond the diameter of nanochannels. Nanochannel-systems with only FEOS of explicit properties provide a quantitative platform for studying substrate transport phenomena through nanoconfined space, including nanopores, nanochannels, nanopipettes, porous membranes and two-dimensional channels. Function elements are key components for nanochannel systems for artificial regulation of ion transport. Here, the authors investigate the independent role of function elements at the outer surface of nanochannel systems, without function elements at inner walls, in promoting osmotic energy conversion and biochemical sensing.
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Dutta S, Bellucci L, Agostini M, Gagliardi M, Corni S, Cecchini M, Brancolini G. Atomistic simulations of gold surface functionalization for nanoscale biosensors applications. NANOTECHNOLOGY 2021; 32:095702. [PMID: 33137790 DOI: 10.1088/1361-6528/abc6dc] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A wide class of biosensors can be built via functionalization of gold surface with proper bio conjugation element capable of interacting with the analyte in solution, and the detection can be performed either optically, mechanically or electrically. Any change in physico-chemical environment or any slight variation in mass localization near the surface of the sensor can cause differences in nature of the transduction mechanism. The optimization of such sensors may require multiple experiments to determine suitable experimental conditions for the immobilization and detection of the analyte. Here, we employ molecular modeling techniques to assist the optimization of a gold-surface biosensor. The gold surface of a quartz-crystal-microbalance sensor is functionalized using polymeric chains of poly(ethylene glycol) (PEG) of 2 KDa molecular weight, which is an inert long chain amphiphilic molecule, supporting biotin molecules (bPEG) as the ligand molecules for streptavidin analyte. The PEG linkers are immobilized onto the gold surface through sulphur chemistry. Four gold surfaces with different PEG linker density and different biotinylation ratio between bPEG and PEG, are investigated by means of state-of-the art atomistic simulations and compared with available experimental data. Results suggest that the amount of biotin molecules accessible for the binding with the protein increases upon increasing the linkers density. At the high density a 1:1 ratio of bPEG/PEG can further improve the accessibility of the biotin ligand due to a strong repulsion between linker chains and different degree of hydrophobicity between bPEG and PEG linkers. The study provides a computaional protocol to model sensors at the level of single molecular interactions, and for optimizing the physical properties of surface conjugated ligand which is crucial to enhance output of the sensor.
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Affiliation(s)
- Sutapa Dutta
- Dipartimento di Scienze Chimiche, Università di Padova, I-35131 Padova, Italy
- Istituto Nanoscienze-CNR-NANO, Center S3, via G. Campi 213/A, I-41125 Modena, Italy
| | - Luca Bellucci
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127 Pisa, Italy
| | - Matteo Agostini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127 Pisa, Italy
| | - Mariacristina Gagliardi
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127 Pisa, Italy
| | - Stefano Corni
- Dipartimento di Scienze Chimiche, Università di Padova, I-35131 Padova, Italy
- Istituto Nanoscienze-CNR-NANO, Center S3, via G. Campi 213/A, I-41125 Modena, Italy
| | - Marco Cecchini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, I-56127 Pisa, Italy
| | - Giorgia Brancolini
- Istituto Nanoscienze-CNR-NANO, Center S3, via G. Campi 213/A, I-41125 Modena, Italy
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Li K, Gupta R, Drayton A, Barth I, Conteduca D, Reardon C, Dholakia K, Krauss TF. Extended Kalman Filtering Projection Method to Reduce the 3σ Noise Value of Optical Biosensors. ACS Sens 2020; 5:3474-3482. [PMID: 33108735 DOI: 10.1021/acssensors.0c01484] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Optical biosensors have experienced a rapid growth over the past decade because of their high sensitivity and the fact that they are label-free. Many optical biosensors rely on tracking the change in a resonance signal or an interference pattern caused by the change in refractive index that occurs upon binding to a target biomarker. The most commonly used method for tracking such a signal is based on fitting the data with an appropriate mathematical function, such as a harmonic function or a Fano, Gaussian, or Lorentz function. However, these functions have limited fitting efficiency because of the deformation of data from noise. Here, we introduce an extended Kalman filter projection (EKFP) method to address the problem of resonance tracking and demonstrate that it improves the tolerance to noise, reduces the 3σ noise value, and lowers the limit of detection (LOD). We utilize the method to process the data of experiments for detecting the binding of C-reactive protein in a urine matrix with a chirped guided mode resonance sensor and are able to improve the LOD from 10 to 1 pg/mL. Our method reduces the 3σ noise value of this measurement compared to a simple Fano fit from 1.303 to 0.015 pixels. These results demonstrate the significant advantage of the EKFP method to resolving noisy data of optical biosensors.
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Affiliation(s)
- Kezheng Li
- Department of Physics, University of York, York YO10 5DD, U.K
| | - Roopam Gupta
- SUPA, School of Physics and Astronomy, University of St Andrews, Andrews KY16 9SS, U.K
- School of Medicine, University of St Andrews, Andrews KY16 9TF, U.K
| | | | - Isabel Barth
- Department of Physics, University of York, York YO10 5DD, U.K
| | | | | | - Kishan Dholakia
- SUPA, School of Physics and Astronomy, University of St Andrews, Andrews KY16 9SS, U.K
- Department of Physics, College of Science, Yonsei University, Seoul 03722, South Korea
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Arshavsky Graham S, Boyko E, Salama R, Segal E. Mass Transfer Limitations of Porous Silicon-Based Biosensors for Protein Detection. ACS Sens 2020; 5:3058-3069. [PMID: 32896130 PMCID: PMC7589614 DOI: 10.1021/acssensors.0c00670] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
Porous
silicon (PSi) thin films have been widely studied for biosensing
applications, enabling label-free optical detection of numerous targets.
The large surface area of these biosensors has been commonly recognized
as one of the main advantages of the PSi nanostructure. However, in
practice, without application of signal amplification strategies,
PSi-based biosensors suffer from limited sensitivity, compared to
planar counterparts. Using a theoretical model, which describes the
complex mass transport phenomena and reaction kinetics in these porous
nanomaterials, we reveal that the interrelated effect of bulk and
hindered diffusion is the main limiting factor of PSi-based biosensors.
Thus, without significantly accelerating the mass transport to and
within the nanostructure, the target capture performance of these
biosensors would be comparable, regardless of the nature of the capture
probe–target pair. We use our model to investigate the effect
of various structural and biosensor characteristics on the capture
performance of such biosensors and suggest rules of thumb for their
optimization.
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Affiliation(s)
- Sofia Arshavsky Graham
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel
- Institute of Technical Chemistry, Leibniz Universität Hannover, Callinstr. 5, Hanover 30167, Germany
| | - Evgeniy Boyko
- Department of Mechanical Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | - Rachel Salama
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel
| | - Ester Segal
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel
- The Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology, Haifa 3200003, Israel
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Gostkowska-Lekner N, Wallacher D, Grimm N, Habicht K, Hofmann T. A novel electrochemical anodization cell for the synthesis of mesoporous silicon. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:105113. [PMID: 33138555 DOI: 10.1063/5.0008536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 10/03/2020] [Indexed: 06/11/2023]
Abstract
A novel design of an electrochemical anodization cell dedicated to the synthesis of mesoporous, single-crystalline silicon is presented. First and foremost, the design principle follows user safety since electrochemical etching of silicon requires highly hazardous electrolytes based on hydrofluoric (HF) acid. The novel cell design allows for safe electrolyte handling prior, during, and post-etching. A peristaltic pump with HF-resistant fluoroelastomer tubing transfers electrolytes between dedicated reservoirs and the anodization cell. Due to the flexibility of the cell operation, different processing conditions can be realized providing a large parameter range for the attainable sample thickness, its porosity, and the mean pore size. Rapid etching on the order of several minutes to synthesize micrometer-thick porous silicon epilayers on bulk silicon is possible as well as long-time etching with continuous, controlled electrolyte flow for several days to prepare up to 1000 μm thick self-supporting porous silicon membranes. A highly adaptable, LabVIEW™-based control software allows for user-defined etching profiles.
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Affiliation(s)
- N Gostkowska-Lekner
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - D Wallacher
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - N Grimm
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - K Habicht
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - T Hofmann
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, 14109 Berlin, Germany
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30
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Choi Y, Phan B, Tanaka M, Hong J, Choi J. Methods and Applications of Biomolecular Surface Coatings on Individual Cells. ACS APPLIED BIO MATERIALS 2020; 3:6556-6570. [DOI: 10.1021/acsabm.0c00867] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yonghyun Choi
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Binh Phan
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Masayoshi Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Jinkee Hong
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jonghoon Choi
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
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31
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Arshavsky-Graham S, Urmann K, Salama R, Massad-Ivanir N, Walter JG, Scheper T, Segal E. Aptamers vs. antibodies as capture probes in optical porous silicon biosensors. Analyst 2020; 145:4991-5003. [PMID: 32519701 DOI: 10.1039/d0an00178c] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Over the past decade aptamers have emerged as a promising class of bioreceptors for biosensing applications with significant advantages over conventional antibodies. However, experimental studies comparing aptasensors and immunosensors, under equivalent conditions, are limited and the results are inconclusive, in terms of benefits and limitations of each bioreceptor type. In the present work, the performance of aptamer and antibody bioreceptors for the detection of a his-tagged protein, used as a model target, is compared. The bioreceptors are immobilized onto a nanostructured porous silicon (PSi) thin film, used as the optical transducer, and the target protein is detected in a real-time and label-free format by reflective interferometric Fourier transform spectroscopy. For the antibodies, random-oriented immobilization onto the PSi nanostructure results in a poor biosensing performance. Contrary, Fc-oriented immobilization of the antibodies shows a similar biosensing performance to that exhibited by the aptamer-based biosensor, in terms of binding rate, dynamic detection range, limit of detection and selectivity. The aptasensor outperforms in terms of its reusability and storability, while the immunosensor could not be regenerated for subsequent experiments.
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Affiliation(s)
- Sofia Arshavsky-Graham
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstr. 5, 30167 Hannover, Germany.
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Zheng D, Choi CH, Zhao X, Sun G. Facile fabrication of sponge-like porous micropillar arrays via an electrochemical process. NANOSCALE 2020; 12:10565-10572. [PMID: 32373863 DOI: 10.1039/d0nr01518k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A large variety of synthetic methods have been developed for hierarchically porous materials by which the performance of a wide range of applications can be dramatically enhanced. Herein, hierarchically porous micropillar arrays are demonstrated by employing electrochemical etching to silicon micropillars. The approach relies on the steering of current flow through the three-dimensional silicon-electrolyte interface to enable nanopores to grow on the entire surface of the micropillars, simultaneously. The pores grow perpendicular to the surface of the micropillars, whereas the pore diameter and porosity vary depending on the locations of the surfaces. The finite element analysis shows that the spatial variation of the pore diameter and porosity is determined by the distribution of current density. Further, the thickness of the porous layer can be tuned by etching time so that sponge-like porous structures are conveniently obtained by regulating the etching time. In addition to the effect of current density flowing through the etched surfaces, the growth of pores also depends on the crystal orientations of the etched surfaces. The etching results on square micropillar arrays and microgroove arrays show that the growth direction and rate of nanopores inside the microstructure also depend on the exposed crystal planes. The facile characteristics of the fabrication method can serve as an effective route for a wide range of applications of porous materials with enhanced capabilities.
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Affiliation(s)
- Deyin Zheng
- Institute of Robotics and Automatic Information System, Nankai University, Tianjin, 300071, People's Republic of China.
| | - Chang-Hwan Choi
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Xin Zhao
- Institute of Robotics and Automatic Information System, Nankai University, Tianjin, 300071, People's Republic of China.
| | - Guangyi Sun
- Institute of Robotics and Automatic Information System, Nankai University, Tianjin, 300071, People's Republic of China.
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33
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Van der Meeren L, Li J, Parakhonskiy BV, Krysko DV, Skirtach AG. Classification of analytics, sensorics, and bioanalytics with polyelectrolyte multilayer capsules. Anal Bioanal Chem 2020; 412:5015-5029. [PMID: 32103307 DOI: 10.1007/s00216-020-02428-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/05/2020] [Accepted: 01/15/2020] [Indexed: 12/17/2022]
Abstract
Polyelectrolyte multilayer (PEM) capsules, constructed by LbL (layer-by-layer)-adsorbing polymers on sacrificial templates, have become important carriers due to multifunctionality of materials adsorbed on their surface or encapsulated into their interior. They have been also been used broadly used as analytical tools. Chronologically and traditionally, chemical analytics has been developed first, which has long been synonymous with all analytics. But it is not the only development. To the best of our knowledge, a summary of all advances including their classification is not available to date. Here, we classify analytics, sensorics, and biosensorics functionalities implemented with polyelectrolyte multilayer capsules and coated particles according to the respective stimuli and application areas. In this classification, three distinct categories are identified: (I) chemical analytics (pH; K+, Na+, and Pb2+ ion; oxygen; and hydrogen peroxide sensors and chemical sensing with surface-enhanced Raman scattering (SERS)); (II) physical sensorics (temperature, mechanical properties and forces, and osmotic pressure); and (III) biosensorics and bioanalytics (fluorescence, glucose, urea, and protease biosensing and theranostics). In addition to this classification, we discuss also principles of detection using the above-mentioned stimuli. These application areas are expected to grow further, but the classification provided here should help (a) to realize the wealth of already available analytical and bioanalytical tools developed with capsules using inputs of chemical, physical, and biological stimuli and (b) to position future developments in their respective fields according to employed stimuli and application areas. Graphical abstract.
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Affiliation(s)
- Louis Van der Meeren
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium
| | - Jie Li
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium
| | - Bogdan V Parakhonskiy
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium
| | - Dmitri V Krysko
- Cell Death Investigation and Therapy Laboratory, Department of Human Structure and Repair, Ghent University, 9000, Ghent, Belgium.,Cancer Research Institute Ghent, 9000, Ghent, Belgium.,Institute of Biology and Biomedicine, National Research Lobachevsky State University of Nizhni Novgorod, Nizhni Novgorod, Russian Federation, 603950
| | - Andre G Skirtach
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium. .,Cancer Research Institute Ghent, 9000, Ghent, Belgium. .,Advanced Light Microscopy Centre, Ghent University, 9000, Ghent, Belgium.
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Arrabito G, Ferrara V, Ottaviani A, Cavaleri F, Cubisino S, Cancemi P, Ho YP, Knudsen BR, Hede MS, Pellerito C, Desideri A, Feo S, Pignataro B. Imbibition of Femtoliter-Scale DNA-Rich Aqueous Droplets into Porous Nylon Substrates by Molecular Printing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:17156-17165. [PMID: 31790261 DOI: 10.1021/acs.langmuir.9b02893] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This work presents the first reported imbibition mechanism of femtoliter (fL)-scale droplets produced by microchannel cantilever spotting (μCS) of DNA molecular inks into porous substrates (hydrophilic nylon). Differently from macroscopic or picoliter droplets, the downscaling to the fL-size leads to an imbibition process controlled by the subtle interplay of evaporation, spreading, viscosity, and capillarity, with gravitational forces being quasi-negligible. In particular, the minimization of droplet evaporation, surface tension, and viscosity allows for a reproducible droplet imbibition process. The dwell time on the nylon surface permits further tuning of the droplet lateral size, in accord with liquid ink diffusion mechanisms. The functionality of the printed DNA molecules is demonstrated at different imbibed oligonucleotide concentrations by hybridization with a fluorolabeled complementary sequence, resulting in a homogeneous coverage of DNA within the imbibed droplet. This study represents a first step toward the μCS-enabled fabrication of DNA-based biosensors and microarrays into porous substrates.
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Affiliation(s)
- G Arrabito
- Department of Physics and Chemistry "Emilio Segrè" , University of Palermo , Building 17, V.le delle Scienze , Palermo 90128 , Italy
| | - V Ferrara
- Department of Chemical Sciences , University of Catania , Viale Andrea Doria 6 , Catania 95125 , Italy
| | - A Ottaviani
- Department of Biology , University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy
| | - F Cavaleri
- Department of Physics and Chemistry "Emilio Segrè" , University of Palermo , Building 17, V.le delle Scienze , Palermo 90128 , Italy
| | - S Cubisino
- Department of Physics and Chemistry "Emilio Segrè" , University of Palermo , Building 17, V.le delle Scienze , Palermo 90128 , Italy
| | - P Cancemi
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies , University of Palermo , Building 16, V.le delle Scienze , Palermo 90128 , Italy
| | - Y P Ho
- Department of Biomedical Engineering , The Chinese University of Hong Kong , Hong Kong SAR , China
- Centre for Novel Biomaterials , The Chinese University of Hong Kong , Hong Kong SAR , China
| | - B R Knudsen
- Department of Molecular Biology and Genetics , Aarhus University , C.F. Møllers Allé 3 , Aarhus C 8000 , Denmark
- iNANO , Aarhus University , Gustav Wieds Vej 14 , Aarhus 8000 , Denmark
| | - M S Hede
- VPCIR.COM , CF. Møllers Alle 3 , Aarhus C 800 , Denmark
| | - C Pellerito
- Department of Physics and Chemistry "Emilio Segrè" , University of Palermo , Building 17, V.le delle Scienze , Palermo 90128 , Italy
| | - A Desideri
- Department of Biology , University of Rome Tor Vergata , Via della Ricerca Scientifica , Rome 00133 , Italy
| | - S Feo
- Department of Biological Chemical and Pharmaceutical Sciences and Technologies , University of Palermo , Building 16, V.le delle Scienze , Palermo 90128 , Italy
| | - B Pignataro
- Department of Physics and Chemistry "Emilio Segrè" , University of Palermo , Building 17, V.le delle Scienze , Palermo 90128 , Italy
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Frattini D, Hyun K, Kwon Y. Direct electrochemistry of lactate dehydrogenase in aqueous solution system containing l(+)-lactic acid, β-nicotinamide adenine dinucleotide, and its reduced form. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.08.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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36
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Mariani S, Paghi A, La Mattina AA, Debrassi A, Dähne L, Barillaro G. Decoration of Porous Silicon with Gold Nanoparticles via Layer-by-Layer Nanoassembly for Interferometric and Hybrid Photonic/Plasmonic (Bio)sensing. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43731-43740. [PMID: 31644268 DOI: 10.1021/acsami.9b15737] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Gold nanoparticle layers (AuNPLs) enable the coupling of morphological, optical, and electrical properties of gold nanoparticles (AuNPs) with tailored and specific surface topography, making them exploitable in many bioapplications (e.g., biosensing, drug delivery, and photothermal therapy). Herein, we report the formation of AuNPLs on porous silicon (PSi) interferometers and distributed Bragg reflectors (DBRs) for (bio)sensing applications via layer-by-layer (LbL) nanoassembling of a positively charged polyelectrolyte, namely, poly(allylamine hydrochloride) (PAH), and negatively charged citrate-capped AuNPs. Decoration of PSi interferometers with AuNPLs enhances the Fabry-Pérot fringe contrast due to increased surface reflectivity, resulting in an augmented sensitivity for both bulk and surface refractive index sensing, namely, about 4.5-fold using NaCl aqueous solutions to infiltrate the pores and 2.6-fold for unspecific bovine serum albumin (BSA) adsorption on the pore surface, respectively. Sensitivity enhancing, about 2.5-fold, is also confirmed for affinity and selective biosensing of streptavidin using a biotinylated polymer, namely, negatively charged poly(methacrylic acid) (b-PMAA). Further, decoration of PSi DBR with AuNPLs envisages building up a hybrid photonic/plasmonic optical sensing platform. Both photonic (DBR stop-band) and plasmonic (localized surface plasmon resonance, LSPR) peaks of the hybrid structure are sensitive to changes of bulk (using glucose aqueous solutions) and surface (due to BSA unspecific adsorption) refractive index. To the best of our knowledge, this is the first report about the formation of AuNPLs via LbL nanoassembly on PSi for (i) the enhancing of the interferometric performance in (bio)sensing applications and (ii) the building up of hybrid photonic/plasmonic platforms for sensing and perspective biosensing applications.
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Affiliation(s)
- Stefano Mariani
- Dipartimento di Ingegneria dell'Informazione , Università di Pisa , Via G. Caruso 16 , 56122 Pisa , Italy
| | - Alessandro Paghi
- Dipartimento di Ingegneria dell'Informazione , Università di Pisa , Via G. Caruso 16 , 56122 Pisa , Italy
| | - Antonino A La Mattina
- Dipartimento di Ingegneria dell'Informazione , Università di Pisa , Via G. Caruso 16 , 56122 Pisa , Italy
| | - Aline Debrassi
- Surflay Nanotec GmbH , Max-Planck-Straße 3 , 12489 Berlin , Germany
| | - Lars Dähne
- Surflay Nanotec GmbH , Max-Planck-Straße 3 , 12489 Berlin , Germany
| | - Giuseppe Barillaro
- Dipartimento di Ingegneria dell'Informazione , Università di Pisa , Via G. Caruso 16 , 56122 Pisa , Italy
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De Stefano L. Porous Silicon Optical Biosensors: Still a Promise or a Failure? SENSORS 2019; 19:s19214776. [PMID: 31684128 PMCID: PMC6864673 DOI: 10.3390/s19214776] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 10/23/2019] [Accepted: 11/01/2019] [Indexed: 12/21/2022]
Abstract
Even if the first published article on a porous silicon (PSi)-based biosensor dates back to more than twenty years ago, this technology still attracts great attention from many research groups around the world. In this brief review, the pros and cons of porous silicon-based optical biosensors will be highlighted on the basis of some recent results and published papers on this subject. The aim of the paper is to give a straightforward introduction to PhD students and young researchers on this subject, which is particularly full of educative content, since it is highly multidisciplinary. Fabrication of PSi-based optical biosensors requires competencies related to many different scientific topics ranging from material science, physics and optics to healthcare and environmental monitoring through surface chemistry and more.
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Affiliation(s)
- Luca De Stefano
- Institute for Microelectronics and Microsystems, National Research Council, Via P. Castellino 111, 80131 Napoli, Italy.
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38
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Yu N, Wu J. Rapid and reagentless detection of thrombin in clinic samples via microfluidic aptasensors with multiple target-binding sites. Biosens Bioelectron 2019; 146:111726. [PMID: 31586758 DOI: 10.1016/j.bios.2019.111726] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 09/18/2019] [Accepted: 09/20/2019] [Indexed: 01/11/2023]
Abstract
A reusable and straightforward aptasensor with the implementation of open-ended porous silicon (OEPSi) membranes was introduced for thrombin detection. When passing through the nanochannels of OEPSi integrated in a microfluidic cell, thrombin in sample solution could be captured by thrombin-binding aptamers (TBA) immobilized along the inner walls. The formation of thrombin-aptamer complex causes refractive index changes which can be measured by reflective interferometric Fourier transform spectroscopy (RIFTS). And this flow-through configuration with OEPSi has proven more efficient in capturing thrombin than the flow-over configuration with closed-ended PSi. For higher sensitivity, we investigated how the pore size, ionic strength, pH and aptamers affected the thrombin-aptamer interaction in nanopores. Under optimized conditions, the limits of detection (LOD) for thrombin detection in the buffer and serum were ∼6.70 nM and ∼8.21 nM respectively and a wide linear detection range (10-1000 nM) was observed. More importantly, this work reveals the sensitivity of the label-free biosensor can be significantly improved by attaching newly designed aptamers with two thrombin-binding sites. This phenomenon also indicates the potential of aptamer probes in adjusting effective pore size and enhancing the interaction between aptamers and targets through meticulous sequence design. Furthermore, the proposed strategy has been applied in thrombin detection in clinic samples successfully, which was verified by Enzyme-Linked Immunosorbent Assays (ELISA).
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Affiliation(s)
- Neng Yu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Jianmin Wu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.
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Myndrul V, Iatsunskyi I. Nanosilicon-Based Composites for (Bio)sensing Applications: Current Status, Advantages, and Perspectives. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2880. [PMID: 31489913 PMCID: PMC6766027 DOI: 10.3390/ma12182880] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/18/2022]
Abstract
This review highlights the application of different types of nanosilicon (nano-Si) materials and nano-Si-based composites for (bio)sensing applications. Different detection approaches and (bio)functionalization protocols were found for certain types of transducers suitable for the detection of biological compounds and gas molecules. The importance of the immobilization process that is responsible for biosensor performance (biomolecule adsorption, surface properties, surface functionalization, etc.) along with the interaction mechanism between biomolecules and nano-Si are disclosed. Current trends in the fabrication of nano-Si-based composites, basic gas detection mechanisms, and the advantages of nano-Si/metal nanoparticles for surface enhanced Raman spectroscopy (SERS)-based detection are proposed.
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Affiliation(s)
- Valerii Myndrul
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61-614 Poznan, Poland.
| | - Igor Iatsunskyi
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61-614 Poznan, Poland.
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Balderas-Valadez RF, Schürmann R, Pacholski C. One Spot-Two Sensors: Porous Silicon Interferometers in Combination With Gold Nanostructures Showing Localized Surface Plasmon Resonance. Front Chem 2019; 7:593. [PMID: 31552216 PMCID: PMC6737042 DOI: 10.3389/fchem.2019.00593] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 08/09/2019] [Indexed: 11/29/2022] Open
Abstract
Sensors composed of a porous silicon monolayer covered with a film of nanostructured gold layer, which provide two optical signal transduction methods, are fabricated and thoroughly characterized concerning their sensing performance. For this purpose, silicon substrates were electrochemically etched in order to obtain porous silicon monolayers, which were subsequently immersed in gold salt solution facilitating the formation of a porous gold nanoparticle layer on top of the porous silicon. The deposition process was monitored by reflectance spectroscopy, and the appearance of a dip in the interference pattern of the porous silicon layer was observed. This dip can be assigned to the absorption of light by the deposited gold nanostructures leading to localized surface plasmon resonance. The bulk sensitivity of these sensors was determined by recording reflectance spectra in media having different refractive indices and compared to sensors exclusively based on porous silicon or gold nanostructures. A thorough analysis of resulting shifts of the different optical signals in the reflectance spectra on the wavelength scale indicated that the optical response of the porous silicon sensor is not influenced by the presence of a gold nanostructure on top. Moreover, the adsorption of thiol-terminated polystyrene to the sensor surface was solely detected by changes in the position of the dip in the reflectance spectrum, which is assigned to localized surface plasmon resonance in the gold nanostructures. The interference pattern resulting from the porous silicon layer is not shifted to longer wavelengths by the adsorption indicating the independence of the optical response of the two nanostructures, namely porous silicon and nanostructured gold layer, to refractive index changes and pointing to the successful realization of two sensors in one spot.
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Affiliation(s)
| | - Robin Schürmann
- Institute of Chemistry, University of Potsdam, Potsdam, Germany
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Talukdar TH, Allen GD, Kravchenko I, Ryckman JD. Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing. OPTICS EXPRESS 2019; 27:22485-22498. [PMID: 31510540 DOI: 10.1364/oe.27.022485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 07/16/2019] [Indexed: 06/10/2023]
Abstract
Guided wave-optics has emerged as a promising platform for label free biosensing. However, device sensitivity toward surface-bound small molecules is directly limited by the evanescent interaction and low confinement factor with the active sensing region. Here, we report a mesoporous silicon waveguide design and inverse fabrication technique that resolves the evanescent field interaction limitation while achieving maximal transverse confinement factors and preserving single-mode operation. The waveguide sensors are characterized in a Fabry-Perot interferometer configuration and the ultra-high sensitivity to small molecule adlayers is demonstrated. We also identify dispersion to be a promising degree of freedom for exceeding the sensitivity limits predicted by the conventional non-dispersive effective medium theory.
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Samanta S, Singh S, Sahoo RR. Covalently grafting of self-assembled functionalized graphene oxide multilayer films on Si substrate for solid film lubrication. THIN SOLID FILMS 2019; 683:16-26. [DOI: 10.1016/j.tsf.2019.05.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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43
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Jeon YS, Shin HM, Kim YJ, Nam DY, Park BC, Yoo E, Kim HR, Kim YK. Metallic Fe-Au Barcode Nanowires as a Simultaneous T Cell Capturing and Cytokine Sensing Platform for Immunoassay at the Single-Cell Level. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23901-23908. [PMID: 31187614 DOI: 10.1021/acsami.9b06535] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Barcode nanowires (BNWs) composed of multiple layered segments of different materials are attractive to bioengineering field due to their characteristics that allow the adjustment of physicochemical properties and conjugation with two or more types of biomolecules to facilitate multiple tasks. Here, we report a metallic Fe (iron)-Au (gold) BNW-based platform for capturing CD8 T cells and the interferon-γ (γ) they secrete, both of which play key roles in controlling infectious diseases such as tuberculosis, at the single-cell level. We also describe an efficient approach for conjugating distinct antibodies, which recognize different epitopes to appropriate materials. The platform achieved detection even with 4.45-35.6 μg mL-1 of BNWs. The T cell capture efficiency was close to 100% and the detection limit for interferon-γ was 460 pg mL-1. This work presents a potential guideline for the design of single-cell immunoassay platforms for eliminating diagnostic errors by unambiguously identifying disease-relevant immune mediators.
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Ren R, Jia Z, Yang J, Kasabov N. Applying Speckle Noise Suppression to Refractive Indices Change Detection in Porous Silicon Microarrays. SENSORS (BASEL, SWITZERLAND) 2019; 19:E2975. [PMID: 31284494 PMCID: PMC6651720 DOI: 10.3390/s19132975] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/19/2019] [Accepted: 06/29/2019] [Indexed: 01/31/2023]
Abstract
The gray value method can be used to detect gray value changes of each unit almost parallel to the surface image of PSi (porous silicon) microarrays and indirectly measure the refractive index changes of each unit. However, the speckles of different noise intensities produced by lasers on a porous silicon surface have different effects on the gray value of the measured image. This results in inaccurate results of refractive index changes obtained from the change in gray value. Therefore, it is very important to reduce the influence of speckle noise on measurement results. In this paper, a new algorithm based on the concepts of probability-based nonlocal-means filtering (PNLM), gradient operator, and median filtering is proposed for gray value restoration of porous silicon microarray images. A good linear relationship between gray value change and refractive index change is obtained, which can reduce the influence of speckle noise on the gray value of the PSi microarray image, improving detection accuracy. This means the method based on gray value change detection can be applied to the biological detection of PSi microarray arrays.
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Affiliation(s)
- Ruyong Ren
- College of Information Science and Engineering, Xinjiang University, Urumuqi 830046, China
| | - Zhenhong Jia
- College of Information Science and Engineering, Xinjiang University, Urumuqi 830046, China.
| | - Jie Yang
- Institute of Image Processing and Pattern Recognition, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Nikola Kasabov
- Knowledge Engineering and Discovery Research Institute, Auckland University of Technology, Auckland 1020, New Zealand
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Kaur S, Law CS, Williamson NH, Kempson I, Popat A, Kumeria T, Santos A. Environmental Copper Sensor Based on Polyethylenimine-Functionalized Nanoporous Anodic Alumina Interferometers. Anal Chem 2019; 91:5011-5020. [PMID: 30793604 PMCID: PMC6543834 DOI: 10.1021/acs.analchem.8b04963] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Anthropogenic copper pollution of environmental waters from sources such as acid mine drainage, antifouling paints, and industrial waste discharge is a major threat to our environment and human health. This study presents an optical sensing system that combines self-assembled glutaraldehyde-cross-linked double-layered polyethylenimine (PEI-GA-PEI)-modified nanoporous anodic alumina (NAA) interferometers with reflectometric interference spectroscopy (RIfS) for label-free, selective monitoring of ionic copper in environmental waters. Calibration of the sensing system with analytical solutions of copper shows a linear working range between 1 and 100 mg L-1, and a low limit of detection of 0.007 ± 0.001 mg L-1 (i.e., ∼0.007 ppm). Changes in the effective optical thickness (ΔOTeff) of PEI-GA-PEI-functionalized NAA interferometers are monitored in real-time by RIfS, and correlated with the amount of ionic copper present in aqueous solutions. The system performance is validated through X-ray photoelectron spectroscopy (XPS) and the spatial distribution of copper within the nanoporous films is characterized by time-of-flight-secondary ion mass spectroscopy (TOF-SIMS). The specificity and chemical selectivity of the PEI-GA-PEI-NAA sensor to Cu2+ ions is verified by screening six different metal ion solutions containing potentially interfering ions such as Al3+, Cd2+, Fe3+, Pb2+, Ni2+, and Zn2+. Finally, the performance of the PEI-GA-PEI-NAA sensor for real-life applications is demonstrated using legacy acid mine drainage liquid and tap water for qualitative and quantitative detection of copper ions. This study provides new opportunities to develop portable, cost-competitive, and ultrasensitive sensing systems for real-life environmental applications.
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Affiliation(s)
- Simarpreet Kaur
- Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Cheryl Suwen Law
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Nathan Hu Williamson
- Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Ivan Kempson
- Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Amirali Popat
- School of Pharmacy, The University of Queensland, PACE Building, Brisbane, Queensland 40172, Australia
| | - Tushar Kumeria
- School of Pharmacy, The University of Queensland, PACE Building, Brisbane, Queensland 40172, Australia
| | - Abel Santos
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Shu J, Qiu Z, Zhou Q, Tang D. A chemiresistive thin-film translating biological recognition into electrical signals: an innovative signaling mode for contactless biosensing. Chem Commun (Camb) 2019; 55:3262-3265. [DOI: 10.1039/c9cc00298g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An innovative signaling mode in which a chemiresistive thin-film electrode monitors the specific gaseous component that results from a biological recognition event to indirectly detect targets in the liquid phase is developed for highly-efficient contactless biosensing. This signaling mode may open a new horizon in designing robust biosensing devices for bioanalysis.
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Affiliation(s)
- Jian Shu
- Key Laboratory for Analytical Science of Food Safety and Biology (MOE & Fujian Province)
- Department of Chemistry
- Fuzhou University
- Fuzhou 350116
- China
| | - Zhenli Qiu
- Key Laboratory for Analytical Science of Food Safety and Biology (MOE & Fujian Province)
- Department of Chemistry
- Fuzhou University
- Fuzhou 350116
- China
| | - Qian Zhou
- Institute of Environmental and Analytical Science
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Dianping Tang
- Key Laboratory for Analytical Science of Food Safety and Biology (MOE & Fujian Province)
- Department of Chemistry
- Fuzhou University
- Fuzhou 350116
- China
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