Sensing Arrays Constructed from Nanoparticle Thin Films and Interdigitated Microelectrodes

Wang, Lingyan; Kariuki, Nancy N.; Schadt, Mark; Mott, Derrick; Luo, Jin; Zhong, Chuan‐Jian; Shi, Xiajing; Zhang, Chen; Hao, Weibing; Lu, Susan; Kim, Nam Kyu; Wang, Jian-Q.

doi:10.3390/s6060667

Cited by 33 publications

(46 citation statements)

References 17 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…134 3) Physisorption using block copolymer micelles (nanoreactors), water-soluble polymers, or star block copolymers. 140–146 4) “Post-modification of pre-formed AuNPs”. In this method, AuNPs are generated in the first stage through conventional methods such as Brust-Schiffrin method, followed by the exchange or modification with polymers.…”

Section: Synthesis and Surface Functionalizationmentioning

confidence: 99%

Gold Nanoparticles in Chemical and Biological Sensing

et al. 2012

View full text Add to dashboard Cite

Section: Synthesis and Surface Functionalizationmentioning

confidence: 99%

Gold Nanoparticles in Chemical and Biological Sensing

et al. 2012

View full text Add to dashboard Cite

“…This procedure leads to a very dense polymer brush construction. Other methods are based on radical polymerization (LRP) [114] and atomtransfer radical polymerization (SI-ATRP) [115,116] (ii) "grafting to" enables one-pot synthesis of AuNPs stabilized by sulphur-containing polymers [10,117], and generally produces a sparser coverage [118] (iii) physisorption using block copolymer micelles (nanoreactors), water-soluble polymers, or star block copolymers [119,120] (iv) "post-modification of preformed AuNPs". In this method, AuNPs are generated in the first stage through conventional methods such as Brust−Schiffrin synthesis, followed by the exchange or modification with polymers [121,122].…”

Section: Grafting Of Noble Metal Nanoparticles To Plasma-activated Pomentioning

confidence: 99%

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

Siegel¹,

Řezníčková²,

Slepička³

et al. 2015

Nanoparticles Technology

View full text Add to dashboard Cite

This chapter summarizes the basic information about elementary characteristics and technology of preparation of noble metal nanoparticles. The introduction gives some basic information on the history of development in this area, especially in terms of dimensionality of metal nanostructures and their possible applications.The first subsection is devoted to the preparation and characterization of "u, "g, Pt, and Pd nanoparticles NPs , which were synthesized by direct metal sputtering in liquid propane-, , ,-triole glycerol . This method provides an interesting alternative to time-consuming, wetbased chemical synthesis techniques. Moreover, the suggested technique allows targeted variation of metal nanoparticle size, which is demonstrated in detail in case of "uNPs by variation of capturing media temperature. Nanoparticle size and shape were studied by transmission electron microscopy and dynamic light scattering. Optical properties of nanoparticle solution were determined by measuring its UV-Vis spectra. Concentration of metal nanoparticles in prepared solutions was determined by atomic absorption spectroscopy. "ntibacterial properties were tested against two common pollutants Escherichia coli, a Gram-negative bacteria, and Staphylococcus epidermidis, a Gram-positive bacteria . In the presence of "g nanoparticles, the growth of E. coli and S. epidermidis was completely inhibited after h. "ny growth inhibition of E. coli was observed neither in the presence of smaller -nm, "uNP -nor bigger -nm, "uNP -"uNPs during the whole examination period. "uNP -, but not "uNP -, was able to inhibit the growth of. S epidermidis. We also observed significant difference in biological activities of Pt and PdNPs. More specifically, PdNPs exhibited considerable inhibitory potential against both E. coli and S. epidermidis, which was in contrast to ineffective PtNPs. Our results indicate that "g, Pd, and partially "uNPs have high potential to combat both Gram-positive and Gram-negative bacterial strains.The second subsection describes the effort to anchor metal nanoparticles onto polyethyleneterephthalate PET carrier. Two different procedures of grafting of polymeric carrier, activated by plasma treatment, with "u and "gNPs are described. In the first procedure, the PET foil was grafted with biphenyl-, -dithiol "PD and subsequently with "u and "gNPs. In the second one, the PET foil was grafted with "u and "gNPs previously coated by the same "PD. X-ray photoelectron spectrosco-© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.py, Fourier transform infrared spectroscopy, and electrokinetic analysis were used for characterization of the polymer surface at different modification steps. "u and "gNPs were characterized by UV-Vis spectroscopy. In case of both types of nanoparticles, the first ...

show abstract

“…The limit of detection (LOD) in terms of the mass of the analyte is expected to scale as A , where A is sensor area [1]. Smaller values for the space, width and length parameters of the electrodes generally lead to higher sensor response sensitivity [2]. The sensitivity of chemiresistors can be improved by using nanostructured electrodes, such as those based on gold nanoparticles, graphene and nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of large area nanogap electrodes for sensing applications

et al. 2013

View full text Add to dashboard Cite

A large area nanogap electrode fabrication method combinig conventional lithography patterning with the of focused ion beam (FIB) is presented. Lithography and a lift-off process were used to pattern 50 nm thick platinum pads having an area of 300 μm × 300 μm. A range of 30-300 nm wide nanogaps (length from 300 μm to 10 mm ) were then etched using an FIB of Ga + at an acceleration voltage of 30 kV at various beam currents. An investigation of Ga + beam current ranging between 1-50 pA was undertaken to optimise the process for the current fabrication method. In this study, we used Monte Carlo simulation to calculate the damage depth in various materials by the Ga + . Calculation of the recoil cascades of the substrate atoms are also presented. The nanogap electrodes fabricated in this study were found to have empty gap resistances exceeding several hundred MΩ. A comparison of the gap length versus electrical resistance on glass substrates is presented. The results thus outline some important issues in lowconductance measurements. The proposed nanogap fabrication method can be extended to various sensor applications, such as chemical sensing, that employ the nanogap platform. This method may be used as a prototype technique for large-scale fabrication due to its simple, fast and reliable features.

show abstract

Sensing Arrays Constructed from Nanoparticle Thin Films and Interdigitated Microelectrodes

Cited by 33 publications

References 17 publications

Gold Nanoparticles in Chemical and Biological Sensing

Gold Nanoparticles in Chemical and Biological Sensing

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

Fabrication of large area nanogap electrodes for sensing applications

Contact Info

Product

Resources

About