Platinum nanoparticles homogenously decorating multilayered reduced graphene oxide for electrical nanobiosensor applications

Proa-Coronado, Sergio; Vargas-Garcı́a, J.R.; Manzo-Robledo, A.; Mendoza-Acevedo, S.; Villagómez, Carlos J.; Mercado-Zúñiga, C.; Muñoz-Aguirre, Narcizo; Villa-Vargas, Luis Alfonso; Martinez-Rivas, Adrian

doi:10.1016/j.tsf.2018.05.032

Cited by 11 publications

(6 citation statements)

References 43 publications

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“… 34 After the laser treatment ( Figure 3 I), the synthesis of PtNPs was confirmed by a positive shift of the Pt 4f peaks to BEs of 71.4 eV (Pt 4f 7/2 ) and 74.5 eV (Pt 4f 5/2 ), with a spin–orbit splitting value of 3.1 eV, which is close to the metallic value (Δ = 3.4 eV). 57 , 58 Despite the fact that the Pt salt can form coordination complexes, the full reduction of the Pt precursor was confirmed by the Pt 4f 7/2 binding energy (71.4 eV) quite similar to the bulk platinum one (71.2 eV). 23 , 59 …”

Section: Resultsmentioning

confidence: 97%

One-Step Laser Nanostructuration of Reduced Graphene Oxide Films Embedding Metal Nanoparticles for Sensing Applications

et al. 2023

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The combination of two-dimensional materials and metal nanoparticles (MNPs) allows the fabrication of novel nanocomposites with unique physical/chemical properties exploitable in high-performance smart devices and biosensing strategies. Current methods to obtain graphene-based films decorated with noble MNPs are cumbersome, poorly reproducible, and difficult to scale up. Herein, we propose a straightforward, versatile, surfactant-free, and single-step technique to produce reduced graphene oxide (rGO) conductive films integrating “naked” noble MNPs. This method relies on the instantaneous laser-induced co-reduction of graphene oxide and metal cations, resulting in highly exfoliated rGO nanosheets embedding gold, silver, and platinum NPs. The production procedure has been optimized, and the obtained nanomaterials are fully characterized; the hybrid nanosheets have been easily transferred onto lab-made screen-printed electrodes preserving their nanoarchitecture. The Au@rGO-, Ag@rGO-, and Pt@rGO-based electrodes have been challenged to detect caffeic acid, nitrite, and hydrogen peroxide in model solutions and real samples. The sensors yielded quantitative responses (R 2 ≥ 0.997) with sub-micromolar limits of detections (LODs ≤ 0.6 μM) for all the analytes, allowing accurate quantification in samples (recoveries ≥ 90%; RSD ≤ 14.8%, n = 3). This single-step protocol which requires low cost and minimal equipment will allow the fabrication of free-standing, MNP-embedded rGO films integrable into a variety of scalable smart devices and biosensors.

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Section: Resultsmentioning

confidence: 97%

One-Step Laser Nanostructuration of Reduced Graphene Oxide Films Embedding Metal Nanoparticles for Sensing Applications

et al. 2023

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“…Relevant scientists in the United States have prepared a biosensor at the level of deoxyribonucleotide biological detection, which mainly uses the irregular edge characteristics of the deoxyribonucleotide to provide high-density active edge sites, so as to expand the detection range [26]. At the research level of the biomedical teaching experiment effect evaluation system, the main system technology includes the computer network and its distributed database management system.…”

Section: Correlation Analysismentioning

confidence: 99%

Effect Evaluation of Biomedical Experiment Teaching Based on Intelligent Sensor

2022

Journal of Sensors

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With the continuous development and progress of nanotechnology, its biosensors have been widely used in biomedical experimental teaching, and good experimental results have been achieved. Graphene, as a new nanomaterial with large surface area, good thermal conductivity, and unique electrical conductivity, has unique advantages in the field of biosensor preparation. Based on this, this paper will prepare the electrochemical sensor applied to biomedical experimental teaching based on graphene, optimize the detection sensitivity and detection range of graphene electrochemical sensor based on the corresponding experimental conditions, and improve its corresponding stability and reusability. At the level of electrochemical activity of biosensors, this paper innovatively uses the electric AC impedance method to detect the electrochemical activity, so as to accurately evaluate the key characteristics of biosensors. Based on the preparation of biosensors and the results of biological experiments, this paper will design a network-based biomedical experiment teaching effect evaluation system, and realize the basic functions of teacher-student interaction, teaching effect evaluation, sensor performance evaluation and so on. Based on the above, the electrochemical sensor based on graphene and a conductive polymer solution is actually prepared in this paper. At the same time, the electrocatalysis experiment is carried out based on the sensor, and the experimental teaching effect is systematically evaluated. The experimental results show that the sensitivity of the biosensor proposed in this paper is increased by about 10% compared with the traditional biosensor, the corresponding preparation complexity is reduced by nearly 1/3, and the corresponding reusability is increased by 30%. Therefore, the biomedical experiment teaching effect evaluation system proposed in this paper has good evaluation effect. It can provide accurate reference for the evaluation of biological experiment teaching effect, so it has important value and significance.

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“…The potential of GPTMS is rather wide, as showcased by coating aluminum alloy for protection against corrosion and the functionalization of multiwalled carbon nanotubes for reinforcement in epoxy nanocomposites . 3-Aminopropyltriethoxysilane (APTS), in analogy, has been used to improve the adhesion of graphene and SiO 2 flakes, improving contact with metal electrodes for sensing devices, as well as to functionalize diazirine for optical fiber biosensors . Hollow microcarriers can also be modified with APTS and used in regenerative drugs and recombinant cells in biopharmaceutical industries …”

Section: Introductionmentioning

confidence: 99%

“…22 3-Aminopropyltriethoxysilane (APTS), in analogy, has been used to improve the adhesion of graphene and SiO 2 flakes, improving contact with metal electrodes for sensing devices, 23 as well as to functionalize diazirine for optical fiber biosensors. 24 Hollow microcarriers can also be modified with APTS and used in regenerative drugs and recombinant cells in biopharmaceutical industries. 25 Relying upon these premises, for the first time we coupled siloxanes to BCNC.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Noncytotoxic Functional Siloxane-Coated Bacterial Cellulose Nanocrystals

Lima

Conte

Brandão

et al. 2022

ACS Appl. Polym. Mater.

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Bacterial cellulose nanocrystals (BCNC) stand out as versatile biocolloidal building blocks for materials that are highperformance, owing to their inherently high crystallinity and specific modulus and surface area, and sustainable, as BCNC are both biobased and biodegradable. BCNC materials are also promising for their multifunctionality because of their huge potential to undergo physical and/or chemical surface modification. This is particularly appealing for biomedical applications thanks to the biocompatibility, high purity, and low toxicity of BCNC. We report on films based on surface-modified BCNC with varying contents of 3-glycidyloxypropyltrimethoxysilane (GPTMS) or 3-aminopropyltriethoxysilane (APTS). Importantly, these highly pure and crystalline needle-shaped BCNC were isolated from scraps generated at industrial operations when shaping bacterial cellulose membranes into wound dressings. The films were extensively characterized as far as their structural characteristics, with emphasis on the major features targeting at biological applications. Compared with pristine BCNC, the films performed better from the thermal stability standpoint and maintained the noncytotoxicity against nontransforming fibroblasts. The latter claim was independent of GPTMS content, but dose-dependent for APTS and valid for films containing up to 30% of this coupling agent. Altogether, this contribution expands the wingspan of nanocellulose-based materials in biomedical applications while mitigating the waste of natural resources by upcycling an industrial byproduct, falling within the circular bioeconomy framework.

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Platinum nanoparticles homogenously decorating multilayered reduced graphene oxide for electrical nanobiosensor applications

Cited by 11 publications

References 43 publications

One-Step Laser Nanostructuration of Reduced Graphene Oxide Films Embedding Metal Nanoparticles for Sensing Applications

One-Step Laser Nanostructuration of Reduced Graphene Oxide Films Embedding Metal Nanoparticles for Sensing Applications

Effect Evaluation of Biomedical Experiment Teaching Based on Intelligent Sensor

Fabrication of Noncytotoxic Functional Siloxane-Coated Bacterial Cellulose Nanocrystals

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