scholarly journals Electrospinning Nanoparticles-Based Materials Interfaces for Sensor Applications

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3977 ◽  
Author(s):  
Zhang ◽  
Jia ◽  
Liu ◽  
Wei ◽  
Su
Keyword(s):  
High Performance ◽  
Environmental Science ◽  
Materials Science ◽  
Functional Materials ◽  
Label Free ◽  
Structure Property ◽  
Metallic Oxide ◽  
Electrospinning Technique ◽  
Sensor Applications ◽  
Surface Enhanced Raman

Electrospinning is a facile technique to fabricate nanofibrous materials with adjustable structure, property, and functions. Electrospun materials have exhibited wide applications in the fields of materials science, biomedicine, tissue engineering, energy storage, environmental science, sensing, and others. In this review, we present recent advance in the fabrication of nanoparticles (NPs)-based materials interfaces through electrospinning technique and their applications for high-performance sensors. To achieve this aim, first the strategies for fabricating various materials interfaces through electrospinning NPs, such as metallic, oxide, alloy/metal oxide, and carbon NPs, are demonstrated and discussed, and then the sensor applications of the fabricated NPs-based materials interfaces in electrochemical, electric, fluorescent, colorimetric, surface-enhanced Raman scattering, photoelectric, and chemoresistance-based sensing and detection are presented and discussed in detail. We believe that this study will be helpful for readers to understand the fabrication of functional materials interfaces by electrospinning, and at the same time will promote the design and fabrication of electrospun nano/micro-devices for wider applications in bioanalysis and label-free sensors.

scholarly journals A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

2020 ◽  
Author(s):  
Kosti Tapio ◽  
Amr Mostafa ◽  
Yuya Kanehira ◽  
Antonio Suma ◽  
Anushree Dutta ◽  
...  
Keyword(s):  
Single Molecule ◽  
General Scheme ◽  
Functional Materials ◽  
Dna Origami ◽  
Label Free ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Series Measurement ◽  
Time Series Measurement

Abstract DNA origami technology allows for the precise nanoscale assembly of chemical entities that give rise to new functional materials. We have created a versatile DNA Origami Nanofork Antenna (DONA) by assembling Au or Ag nanoparticle dimers with different gap sizes down to 1.17 nm, enabling signal enhancements in surface-enhanced Raman scattering (SERS) of up to 1011. This allows for single-molecule SERS measurements, which can even be performed with larger gap sizes to accommodate differently sized molecules, and at various excitation wavelengths. A general scheme is presented to place single analyte molecules into the SERS hot spots using the DNA origami structure exploiting covalent and non-covalent coupling schemes. By using Au and Ag dimers, single-molecule SERS measurements of three dyes and cytochrome c and horseradish peroxidase proteins are demonstrated even under non-resonant excitation conditions, thus providing long photostability during time-series measurement, and enabling unprecedented optical monitoring of single molecules.

scholarly journals Ultrasensitive SERS-Based Plasmonic Sensor with Analyte Enrichment System Produced by Direct Laser Writing

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 49 ◽  
Author(s):  
Georgii Pavliuk ◽  
Dmitrii Pavlov ◽  
Eugeny Mitsai ◽  
Oleg Vitrik ◽  
Aleksandr Mironenko ◽  
...  
Keyword(s):  
High Performance ◽  
Organic Dyes ◽  
Medical Diagnostics ◽  
Water Repellent ◽  
Label Free ◽  
Plasmonic Sensor ◽  
Active Sensor ◽  
Direct Laser ◽  
Surface Enhanced Raman ◽  
Analyte Enrichment

We report an easy-to-implement device for surface-enhanced Raman scattering (SERS)-based detection of various analytes dissolved in water droplets at trace concentrations. The device combines an analyte-enrichment system and SERS-active sensor site, both produced via inexpensive and high-performance direct femtosecond (fs)-laser printing. Fabricated on a surface of water-repellent polytetrafluoroethylene substrate as an arrangement of micropillars, the analyte-enrichment system supports evaporating water droplet in the Cassie–Baxter superhydrophobic state, thus ensuring delivery of the dissolved analyte molecules towards the hydrophilic SERS-active site. The efficient pre-concentration of the analyte onto the sensor site based on densely arranged spiky plasmonic nanotextures results in its subsequent label-free identification by means of SERS spectroscopy. Using the proposed device, we demonstrate reliable SERS-based fingerprinting of various analytes, including common organic dyes and medical drugs at ppb concentrations. The proposed device is believed to find applications in various areas, including label-free environmental monitoring, medical diagnostics, and forensics.

New Emerging One Dimensional Nanostructure Materials for Gas Sensing Application: A Mini Review

2019 ◽  
Vol 15 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Vinod Kumar Gupta ◽  
Njud S. Alharbie ◽  
Shilpi Agarwal ◽  
Vladimir A. Grachev
Keyword(s):  
High Performance ◽  
Functional Materials ◽  
Building Blocks ◽  
Sensor Technology ◽  
Future Research ◽  
Structure Property ◽  
One Dimensional ◽  
Nanostructure Materials ◽  
Research Perspectives ◽  
1D Nanostructure

Background: Nanomaterials have numerous potential applications in many areas such as electronics, optoelectronics, catalysis and composite materials. Particularly, one dimensional (1D) nanomaterials such as nanobelts, nanorods, and nanotubes can be used as either functional materials or building blocks for hierarchical nanostructures. 1D nanostructure plays a very important role in sensor technology. Objective: In the current review, our efforts are directed toward recent review on the use of 1D nanostructure materials which are used in the literature for developing high-performance gas sensors with fast response, quick recovery time and low detection limit. This mini review also focuses on the methods of synthesis of 1D nanostructural sensor array, sensing mechanisms and its application in sensing of different types of toxic gases which are fatal for human mankind. Particular emphasis is given to the relation between the nanostructure and sensor properties in an attempt to address structure-property correlations. Finally, some future research perspectives and new challenges that the field of 1D nanostructure sensors will have to address are also discussed.

scholarly journals Biomimetic Hydroxyapatite on Graphene Supports for Biomedical Applications: A Review

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1435 ◽  
Author(s):  
Gang Wei ◽  
Coucong Gong ◽  
Keke Hu ◽  
Yabin Wang ◽  
Yantu Zhang
Keyword(s):  
Biomedical Applications ◽  
High Performance ◽  
Environmental Science ◽  
Materials Science ◽  
Low Cost ◽  
Biomimetic Synthesis ◽  
Synthesis Methods ◽  
Design And Synthesis ◽  
High Performance Composite ◽  
Biomimetic Hydroxyapatite

Hydroxyapatite (HA) has been widely used in fields of materials science, tissue engineering, biomedicine, energy and environmental science, and analytical science due to its simple preparation, low-cost, and high biocompatibility. To overcome the weak mechanical properties of pure HA, various reinforcing materials were incorporated with HA to form high-performance composite materials. Due to the unique structural, biological, electrical, mechanical, thermal, and optical properties, graphene has exhibited great potentials for supporting the biomimetic synthesis of HA. In this review, we present recent advance in the biomimetic synthesis of HA on graphene supports for biomedical applications. More focuses on the biomimetic synthesis methods of HA and HA on graphene supports, as well as the biomedical applications of biomimetic graphene-HA nanohybrids in drug delivery, cell growth, bone regeneration, biosensors, and antibacterial test are performed. We believe that this review is state-of-the-art, and it will be valuable for readers to understand the biomimetic synthesis mechanisms of HA and other bioactive minerals, at the same time it can inspire the design and synthesis of graphene-based novel nanomaterials for advanced applications.

scholarly journals A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

2020 ◽  
Author(s):  
Kosti Tapio ◽  
Amr Mostafa ◽  
Yuya Kanehira ◽  
Antonio Suma ◽  
Anushree Dutta ◽  
...  
Keyword(s):  
Single Molecule ◽  
General Scheme ◽  
Functional Materials ◽  
Dna Origami ◽  
Label Free ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Series Measurement ◽  
Time Series Measurement

Abstract DNA origami technology allows for the precise nanoscale assembly of chemical entities that give rise to new functional materials. We have created a versatile DNA Origami Nanofork Antenna (DONA) by assembling Au or Ag nanoparticle dimers with 1.17 ± 0.67 nm gap size, enabling signal enhancements in surface-enhanced Raman scattering (SERS) of up to 1011. This allows for single-molecule SERS measurements, which can even be performed with larger gap sizes to accommodate differently sized molecules, and at various excitation wavelengths. A general scheme is presented to place single analyte molecules into the SERS hot spots using the DNA origami structure exploiting covalent and non-covalent coupling schemes. By using Au and Ag dimers, single-molecule SERS measurements of three dyes and cytochrome c and horseradish peroxidase proteins are demonstrated even under non-resonant excitation conditions, thus providing long photostability during time-series measurement, and enabling unprecedented optical monitoring of single molecules and DNA origami based nanomachines.

scholarly journals High-performance Nanocavities-based Meta-crystals for Enhanced Plasmonic Sensing

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
M. Rippa ◽  
R. Castagna ◽  
M. Pannico ◽  
P. Musto ◽  
E. Bobeico ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
High Performance ◽  
Surface Enhanced Raman Spectroscopy ◽  
Label Free ◽  
Self Assembling ◽  
Plasmonic Sensing ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

AbstractWe report on a novel procedure of fabrication to easily obtain highly reproducible nanocavities-shaped photonic crystals with strong plasmonic performances. Thus, we also report on the morphological and optical characterization of the obtained structures. They are classifiable as 2-layers (organic and inorganic) photonic crystals based on iso-Y-shaped nano-cavities. Such novel designed structures are compelling candidates for the development of highly sensitive biosensors due to their unique surface plasmon resonances (SPRs) and SPR enabled surface-enhanced Raman spectroscopy (SERS). The planar photonic crystal comprises a polymeric (ZEP520A) layer (thickness ~80 nm) sandwiched between a layer of gold (~50 nm thickness) and a glass substrate. For what concerns the cavities’ shape, iso-Y units are chosen on the basis of their third order nonlinearity and are coupled in hexagonal-based configuration to produce extended meta-structures. The substrates are functionalized with a probe made by a self-assembling monolayer (SAM) of 4-mercaptobenzoic acid (4-MBA). The average SERS Enhancement Factor >106 and SPR sensitivity of ~300 nm/RIU confirm that the proposed 2-layers iso-Y meta-structure is very suitable for high sensitive label-free plasmonic sensing.

Product Design Applied to Formulated Products

2015 ◽  
Vol 4 (3) ◽  
pp. 21-43
Author(s):  
Andrew M. Bodratti ◽  
Zhiqi He ◽  
Marina Tsianou ◽  
Chong Cheng ◽  
Paschalis Alexandridis
Keyword(s):  
New York ◽  
Product Design ◽  
Student Performance ◽  
Chemical Engineering ◽  
Materials Science ◽  
Functional Materials ◽  
Significant Shift ◽  
Structure Property ◽  
Nano Structure ◽  
Course Material

Product development is a multi-faceted role that a growing number of engineers are tasked with. This represents a significant shift in career paths for those employed in the chemical and materials engineering disciplines, who typically were concerned with bulk commodity manufacturing. This paradigm shift requires the undergraduate curriculum to be adapted to prepare students for these new responsibilities. The authors present here on a product design capstone course developed for chemical engineering seniors at the University at Buffalo (UB), The State University of New York (SUNY). The course encompasses the following themes: a general framework for product design and development (identify customer needs, convert needs to specifications, create ideas/concepts, select concept, formulate/test/manufacture product; and (nano)structure-property relations that guide the search for smart/tunable/functional materials for contemporary needs and challenges. These two main themes are enriched with case studies of successful products. Students put the course material into practice by working through formulated product design projects that are drawn from real-world problems. The authors begin by presenting the course organization, teaching techniques, and assessment strategy. They then discuss examples of student work to show how students apply the course material to solve problems. Finally, they present an analysis of historical student performance in the course. The analysis seeks to identify correlation between related student deliverables, and also between the Product Design course and a prerequisite materials science and engineering course.

scholarly journals The mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO3 ceramics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaoyi Gao ◽  
Zhenxiang Cheng ◽  
Zibin Chen ◽  
Yao Liu ◽  
Xiangyu Meng ◽  
...  
Keyword(s):  
High Performance ◽  
Functional Materials ◽  
Atomic Scale ◽  
Ferroelectric Ceramics ◽  
Structure Property ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
High Dielectric

Abstract(K,Na)NbO3 based ceramics are considered to be one of the most promising lead-free ferroelectrics replacing Pb(Zr,Ti)O3. Despite extensive studies over the last two decades, the mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO3 ceramics has not been fully understood. Here, we combine temperature-dependent synchrotron x-ray diffraction and property measurements, atomic-scale scanning transmission electron microscopy, and first-principle and phase-field calculations to establish the dopant–structure–property relationship for multi-elements doped (K,Na)NbO3 ceramics. Our results indicate that the dopants induced tetragonal phase and the accompanying high-density nanoscale heterostructures with low-angle polar vectors are responsible for the high dielectric and piezoelectric properties. This work explains the mechanism of the high piezoelectricity recently achieved in (K,Na)NbO3 ceramics and provides guidance for the design of high-performance ferroelectric ceramics, which is expected to benefit numerous functional materials.

Product Design Applied to Formulated Products

2017 ◽  
pp. 519-542
Author(s):  
Andrew M. Bodratti ◽  
Zhiqi He ◽  
Marina Tsianou ◽  
Chong Cheng ◽  
Paschalis Alexandridis
Keyword(s):  
New York ◽  
Product Design ◽  
Student Performance ◽  
Chemical Engineering ◽  
Materials Science ◽  
Functional Materials ◽  
Undergraduate Curriculum ◽  
Structure Property ◽  
Nano Structure ◽  
Course Material

Product development is a multi-faceted role that a growing number of engineers are tasked with. This represents a significant shift in career paths for those employed in the chemical and materials engineering disciplines, who typically were concerned with bulk commodity manufacturing. This paradigm shift requires the undergraduate curriculum to be adapted to prepare students for these new responsibilities. The authors present here on a product design capstone course developed for chemical engineering seniors at the University at Buffalo (UB), The State University of New York (SUNY). The course encompasses the following themes: a general framework for product design and development (identify customer needs, convert needs to specifications, create ideas/concepts, select concept, formulate/test/manufacture product; and (nano)structure-property relations that guide the search for smart/tunable/functional materials for contemporary needs and challenges. These two main themes are enriched with case studies of successful products. Students put the course material into practice by working through formulated product design projects that are drawn from real-world problems. The authors begin by presenting the course organization, teaching techniques, and assessment strategy. They then discuss examples of student work to show how students apply the course material to solve problems. Finally, they present an analysis of historical student performance in the course. The analysis seeks to identify correlation between related student deliverables, and also between the Product Design course and a prerequisite materials science and engineering course.

scholarly journals Recent Advances in the Fabrication and Environmental Science Applications of Cellulose Nanofibril-Based Functional Materials

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5390
Author(s):  
Lianming Zhang ◽  
Lei Guo ◽  
Gang Wei
Keyword(s):  
Environmental Science ◽  
Materials Science ◽  
Organic Dyes ◽  
Low Cost ◽  
Cellulose Nanofibrils ◽  
Three Dimensional ◽  
Functional Materials ◽  
Building Blocks ◽  
Research Field ◽  
Practical Applications

Cellulose is one of the important biomass materials in nature and has shown wide applications in various fields from materials science, biomedicine, tissue engineering, wearable devices, energy, and environmental science, as well as many others. Due to their one-dimensional nanostructure, high specific surface area, excellent biodegradability, low cost, and high sustainability, cellulose nanofibrils/nanofibers (CNFs) have been widely used for environmental science applications in the last years. In this review, we summarize the advance in the design, synthesis, and water purification applications of CNF-based functional nanomaterials. To achieve this aim, we firstly introduce the synthesis and functionalization of CNFs, which are further extended for the formation of CNF hybrid materials by combining with other functional nanoscale building blocks, such as polymers, biomolecules, nanoparticles, carbon nanotubes, and two-dimensional (2D) materials. Then, the fabrication methods of CNF-based 2D membranes/films, three-dimensional (3D) hydrogels, and 3D aerogels are presented. Regarding the environmental science applications, CNF-based nanomaterials for the removal of metal ions, anions, organic dyes, oils, and bio-contents are demonstrated and discussed in detail. Finally, the challenges and outlooks in this promising research field are discussed. It is expected that this topical review will guide and inspire the design and fabrication of CNF-based novel nanomaterials with high sustainability for practical applications.

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