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In-situ and real-time probing cellulase biosensor formation and its interaction with lignosulfonate in varied media

Publication year: 2021
Authors: Peipei Wang a,1, Tian Liu a,1, Yena Liu a,1, Jing Tian a, Xinyu Zhang a, Jiaqi Guo a, Yongcan Jin a, Huining Xiao b, Junlong Song a
Published in: Sensors and Actuators B: Chemical, Vol. 329 (2021), 129114
It is a challenge to interpret the signals obtained by Quartz Crystal Microbalance (QCM) and Surface Plasmon Resonance (SPR) accompanied with in the significant changes of the density and/or refractivity of media. [...]

Development of a novel biosensor for Creatine Kinase (CK-MB) using Surface Plasmon Resonance (SPR)

Publication year: 2021
Authors: André L.Ferreira a,1, Lucas F.de Lima b,1, Ariana S.Moraes a,1, Rafael J.G.Rubira c,1, Carlos J.L.Constantino c, Fabio L.Leite a, Adriana O.Delgado-Silva a, Marystela Ferreira a
Published in: Applied Surface Science, Vol. 554 (2021), 149565
In this paper, we report a new biosensor for detection of the cardiac biomarker Creatine Kinase (CK-MB) using Surface Plasmon Surface (SPR) technique, with the purpose of the diagnosis of Acute Myocardial Infarction (AMI). [...]

SPRD: a surface plasmon resonance database of common factors for better experimental planning

Publication year: 2021
Authors: P.B. Tiwari 1, C. Bencheqroun 2, M. Lemus 1, T. Shaw 1, M. Kouassi-Brou 1,3, A. Alaoui 2, A. Üren 1
Published in: BMC Molecular and Cell Biology, Vol. 22, 17 (2021)
Surface plasmon resonance is a label-free biophysical technique that is widely used in investigating biomolecular interactions, including protein-protein, protein-DNA, and protein-small molecule binding. [...]

Real-time adsorption of optical brightening agents on cellulose thin films

Publication year: 2021
Authors: C. Sampl a,b, S.Eyley c, W. Thielemans c, U.Hirn a,b,1, S.Spirk a,b
Published in: Carbohydrate Polymers, Vol. 261 (2021), 117826
Optical brightening agents (OBAs) are commonly used in textile and paper industry to adjust product brightness and color appearence. Continuous production processes lead to short residence time of the dyes in the fiber suspension, [...]

Effect of laminin, polylysine and cell medium components on the attachment of human hepatocellular carcinoma cells to cellulose nanofibrils analyzed by surface plasmon resonance

Publication year: 2021
Authors: Xue Zhang a, Tapani Viitala b,1, Riina Harjumäki a,b, Alma Kartal-Hodzic b, Juan José Valle-Delgado a, Monika Österberg a
Published in: Journal of Colloid and Interface Science, Vol. 584 (2021), p. 310-319
The development of in vitro cell models that mimic cell behavior in organs and tissues is an approach that may have remarkable impact on drug testing and tissue engineering applications in the future. [...]

Terminal deoxynucleotidyl transferase-mediated formation of protein binding polynucleotides

Publication year: 2021
Authors: J. Ashley 1,2, A.-L. Schaap-Johansen 1, M. Mohammadniaei 1, M. Naseri 1, P. Marcatili 1, M. Prado 2, Y. Sun 1
Published in: Nucleic Acids Research, 2021, Vol. 49, Issue 2, p. 1065–1074
Terminal deoxynucleotidyl transferase (TdT) enzyme plays an integral part in the V(D)J recombination, allowing for the huge diversity n expression of immunoglobulins and T-cell receptors [...]

Combining Chemical Functionalization and FinFET Geometry for Field Effect Sensors as Accessible Technology to Optimize pH Sensing

Publication year: 2021
Authors: D.Rani 1, S.Rollo 1,2, W.Olthuis 2, S.Krishnamoorthy 1, C.P.García 1
Published in: Chemosensors 2021, Vol. 9(2), 20
Field Effect Transistors (FETs) have led the progress of applications measuring the acidity in aqueous solutions thanks to their accuracy, ease of miniaturization and capacity of multiplexing. [...]

Functional Plasma Polymerized Surfaces for Biosensing

Publication year: 2020
Authors: Makhneva* E., Barillas L 1., Farka Z. 2, Pastucha M. 2, Skládal P. 2, Weltmann K.D. 1, Fricke K. 1
Published in: Applied Material Interfaces, 2020, Vol.12, 14, p.17100–17112
The capabilities of biosensors for fast, economic, and user-friendly analysis of complex samples has led to the exploitation of analytical devices for detection, quantification, and monitoring of specific chemical species for various applications. For a sufficiently high surface reactivity toward the adopted bioreceptors, a thin functional layer is required to enable coupling of the target biomolecules and to provide good stability in the presence of a sample matrix.[...]

Following in Situ the Degradation of Mesoporous Silica in Biorelevant Conditions: At Last, a Good Comprehension of the Structure Influence

Publication year: 2020
Authors: Bindini E. 1,2, Chehadi Z. 1, Faustini M. 1, Albouy P. 3, Grosso D. 4, Cattoni A. 2, Chanéac C. 1, Azzaroni O. 5, Sanchez C. 1, Boissiè C. 1
Published in: ACS Applied Materials and Interfaces, 2020, Vol.12, p.13598–13612
Mesoporous silica nanoparticles (MSNs) have seen a fast development as drug delivery carriers thanks to their tunable porosity and high loading capacity. The employ of MSNs in biomedical applications requires a good understanding of their degradation behavior both to control drug release and to assess possible toxicity issues on human health.[...]

Enhancing the Sensitivity of Biotinylated Surfaces by Tailoring the Design of the Mixed Self-Assembled Monolayer Synthesis

Publication year: 2020
Authors: Blasi D. ‡†, Sarcina L. ‡§, Tricase A. ‡§, Stefanachi A. ‖, Leonetti F.*‖, Alberga D. $, Mangiatordi* Ͱ, Manoli K. †§, Scamarcio G. ◊∫, Picca R.A. *†§, Torsi L. †§#
Published in: ACS Omega 2020, Vol. 5, 27, p. 16762–16771
Thiolated self-assembled monolayers (SAMs) are typically used to anchor on a gold surface biomolecules serving as recognition elements for biosensor applications. Here, the design and synthesis of N-(2-hydroxyethyl)-3-mercaptopropanamide (NMPA) in biotinylated mixed SAMs is proposed as an alternative strategy with respect to on-site multistep functionalization of SAMs prepared from solutions of commercially available thiols.[...]

CVD-grown Graphene-on-Au characterization and sensing using Kretschmann-based SPR

Publication year: 2020
Authors: Jamil N.A.1, Mei G.S.1, Zain A.R. 1,2, Hewak D. 3, Huang C-C. 3, Mohamed M.A. 1, Majlis B.Y. 1, Menon P.S.1,*
Published in: Electron Devices Technology and Manufacturing Conference (EDTM), IEEE
A Kretschmann-based surface plasmon resonance (SPR) sensing method was used to determine the refractive index and thickness of graphene thin films. The measured complex refractive index (n,k) values of graphene on Au at 670 nm and 785 nm wavelength are 2.85, 0.74 and 3.1, 1.19 respectively. In further analysis, the analysis of sensing performance of graphene on Au SPR sensor for ethanol detection was obtained using Finite Difference Time Domain (FDTD) method.[...]

Generic High-Capacity Electrochemical Capture and Release of Proteins by Polyelectrolyte Brushes

Publication year: 2020
Authors: Ferrand-Drake del Castillo G., Adali Z., L. N. Hailes R., Xiong K., Dahlin A.*
Published in: Preprint in Chem RXIV, 2020
We present a polyelectrolyte brush electrode with high-capacity for protein immobilization that captures and releases proteins by an electrochemical potential. Central to our concept is the use of polyelectrolyte brushes that switch reversibly by electrochemistry.[...]

Nickel (II) phthalocyanine-tetrasulfonic-Au nanoparticles nanocomposite film for tartrazine electrochemical sensing

Publication year: 2020
Authors: de Lima L. 1, Maciel C. 2, Ferreira A. 1, de Almeida J. 2, Ferreira M. 1*
Published in: Materials Letters, 2020 Vol. 262, p. 127186
In this work, we report the analytical detection of tartrazine through differential pulse voltammetry (DPV) using gold nanoparticles (AuNPs) and Nickel(II)-phthalocyanine-tetrasulfonic (NiTsPc). The Layer-by-Layer (LbL) film was constructed following the Au-(AuNPs-PAH/NiTsPc)5 architecture.[...]

PEDOT-polyamine composite films for bioelectrochemical platforms -flexible and easy to derivatize

Publication year: 2020
Authors: Sappia L. +a, Piccinini E. +a, von Binderling C. a, Knoll W. bcd, Marmisollé W. *a, Azzorini O. *acd
Published in: Material Sciece and Engineering: C, 2020, Vol. 109, p.110575
We report a straightforward route for the preparation of flexible, electrochemically stable and easily functionalizable poly(3,4-ethylenedioxythiophene) (PEDOT) composite films deposited on PET foils as biosensing platforms. For this purpose, poly(allylamine) hydrochloride (PAH) was blended with PEDOT to provide amine-bearing sites for further biofunctionalization as well as to improve the mechanical properties of the films.[...]

Matter‐tag: A universal immobilization platform for enzymes on polymers, metals, and silicon‐based materials

Publication year: 2020
Authors: Dedisch S. 12, Wiens A. 2, Davari M.D. 2, Söder D. 1, Rodriguez‐Emmenegger C. 13, Jakob F. 12, Schwaneberg U.*12
Published in: Biotechnology and Bioengineering, 2020, Vol. 117, Issue1, p. 49-61
Enzyme immobilization is extensively studied to improve enzyme properties in catalysis and analytical applications. Here, we introduce a simple and versatile enzyme immobilization platform based on adhesion‐promoting peptides, namely Matter‐tags. Matter‐tags immobilize enzymes in an oriented way as a dense monolayer.[...]

Layer-by-Layer nanostructured films of magnetite nanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection

Publication year: 2020
Authors: de Lima L., Daikuzono C., Miyazaki C., Pereira E., Ferreira M.*
Published in: Applied Surface Science 2020, Vol. 505, p. 144278
The sustained use of cosmetics, hygiene products and medicines containing methylparaben (MeP) can be related to cases of cancer in women and children, which is why it is important to develop simple ways to monitor this compound. Gold electrodes were modified with Layer-by-Layer (LbL) films of magnetite nanoparticles (MNP) and polypyrrole (Ppy) for electrochemical determination of MeP.[...]

Surface Preconditioning Influences the Antifouling Capabilities of Zwitterionic and Nonionic Polymer Brushes

Publication year: 2020
Authors: Víšová I. 1, Vrabcová M. 1, Forinová M. 1, Zhigunová Y. 1, Mironov V. 1, Houska . 1, Bittrich E. 2, Eichhorn K. 2, Hashim H. 3,4, Schovánek P. 1,5, Dejneka A. 1, Vaisocherová - Lísalová H. 1
Published in: Langmuir, 2020, Vol. 36, 29, 8485–8493
Polymer brushes not only represent emerging surface platforms for numerous bioanalytical and biological applications but also create advanced surface-tethered systems to mimic real-life biological processes. In particular, zwitterionic and nonionic polymer brushes have been intensively studied because of their extraordinary resistance to nonspecific adsorption of biomolecules (antifouling characteristics) as well as the ability to be functionalized with bioactive molecules.[...]

In situ analysis of liposome hard and soft protein corona structure and composition in a single label-free workflow

Publication year: 2020
Authors: Kari O. *ab, Ndika J. c, Parkkila P. b, Louna A. a, Lajunen T. ǂa, Puustinen A. d, Viitala T. *§b, Alenius H. ce, Urtti A. af
Published in: Nanoscale, 2020, Vol. 12, p. 1728
Methodological constraints have limited our ability to study protein corona formation, slowing nanomedicine development and their successful translation into the clinic. We determined hard and soft corona structural properties along with the corresponding proteomic compositions on liposomes in a label-free workflow: surface plasmon resonance and a custom biosensor for in situ structure determination on liposomes and corona separation, and proteomics using sensitive nanoliquid chromatography tandem mass spectrometry with open-source bioinformatics platforms.[...]

An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer‐by‐layer films

Publication year: 2020
Authors: de Lima L. 1,2, Maciel C. 3, Ferreira A. 1, Rubira R. 4, Constantino C. 4, Ferreira M. *1 1M.
Published in: Journal of Applied Polymer Science, 2020
In this paper, we report the controlled fabrication of layer‐by‐layer (LbL) films deposited on gold substrates with three different supramolecular architectures using polypyrrole (Ppy) and magnetite nanoparticles (Fe3O4‐np), besides conventional poly(allylamine hydrochloride) (PAH) e poly(vinyl sulfonic acid) (PVS) polyelectrolytes, demonstrating the synergistic effect between Ppy and Fe3O4‐np such as a result of their interaction.[...]

Modulation of Living Cell Behavior with Ultra‐Low Fouling Polymer Brush Interfaces

Publication year: 2020
Authors: Víšová I., Smolková B., Uzhytchak M., Vrabcová M., Zhigunova Y., Houska M. ,Surman F., de los Santos Pereira A.,Lunov O., Dejneka A., Vaisocherová‐Lísalová H.
Published in: Macromolecular Bioscience, 2020, Vol. 20, 3, p. 1900351
Ultra‐low fouling and functionalizable coatings represent emerging surface platforms for various analytical and biomedical applications such as those involving examination of cellular interactions in their native environments. Ultra‐low fouling surface platforms as advanced interfaces enabling modulation of behavior of living cells via tuning surface physicochemical properties are presented and studied.[...]