(Gold Nanorod Core)/(Polyaniline Shell) Plasmonic Switches with Large Plasmon Shifts and Modulation Depths

Jiang, Nina; Shao, Lei; Wang, Jianfang

doi:10.1002/adma.201305905

Cited by 137 publications

(145 citation statements)

References 55 publications

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“…Proton dedoping is realized by supplying NaOH to neutralize the acid and recover the undoped emeraldine form of PANI, which has a smaller conductivity. At the undoped and doped states of the PANI layer, the nanostructures show distinct spectra in the visible-NIR region, which lead to the change in absorption at a given wavelength [30]. This stability of absorption at 785 nm proved the good reversibility of PANI-GNPs-glass sensor, which makes PANI-GNPs-glass promising for pH monitoring.…”

Section: Resultsmentioning

confidence: 99%

“…Various metal nanostructures have been fabricated with controlled shape and size [28,29]. Modification of nanostructures with active dielectric materials enables the plasmonic responses of various molecules [30], and thus they hold the potential to be developed into large-scale arrays composed of miniaturized signal transducer elements for the rapid detection of biomolecules and ions in the field of mobile healthcare and clinical diagnostics [31]. However, the application of nanostructures as LSPR sensing elements for monitoring the concentration of molecules or ions in a mouth has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

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An Optical Sensor with Polyaniline-Gold Hybrid Nanostructures for Monitoring pH in Saliva

Luo

Wang

et al. 2017

Nanomaterials

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Saliva contains important personal physiological information that is related to some diseases, and it is a valuable source of biochemical information that can be collected rapidly, frequently, and without stress. In this article, we reported a new and simple localized surface plasmon resonance (LSPR) substrate composed of polyaniline (PANI)-gold hybrid nanostructures as an optical sensor for monitoring the pH of saliva samples. The overall appearance and topography of the substrates, the composition, and the wettability of the LSPR surfaces were characterized by optical and scanning electron microscope (SEM) images, infrared spectra, and contact angles measurement, respectively. The PANI-gold hybrid substrate readily responded to the pH. The response time was very short, which was 3.5 s when the pH switched from 2 to 7, and 4.5 s from 7 to 2. The changes of visible-near-infrared (NIR) spectra of this sensor upon varying pH in solution showed that—for the absorption at given wavelengths of 665 nm and 785 nm—the sensitivities were 0.0299 a.u./pH (a.u. = arbitrary unit) with a linear range of pH = 5–8 and 0.0234 a.u./pH with linear range of pH = 2–8, respectively. By using this new sensor, the pH of a real saliva sample was monitored and was consistent with the parallel measurements with a standard laboratory method. The results suggest that this novel LSPR sensor shows great potential in the field of mobile healthcare and home medical devices, and could also be modified by different sensitive materials to detect various molecules or ions in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Optical Sensor with Polyaniline-Gold Hybrid Nanostructures for Monitoring pH in Saliva

Luo

Wang

et al. 2017

Nanomaterials

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“…In particular, gold nanoparticles (Au NPs) are widely studied because they finds increasing applications in the field of surface enhanced Raman scattering (SERS), biosensing, plasmonic, biomedicine and catalysis [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Size controlled synthesis of gold nanostructures using ketones and their catalytic activity towards reduction of p-nitrophenol

2016

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“…One of the primary principles of AMP is to harness the externally controllable changes in the structural, electrical, and/or dielectric properties of organic materials for the dynamic tuning of SPs in terms of resonance wavelength, phase and/or amplitude, which is also the subject of this review. So far, a wide range of organic materials, including simple molecules, supramolecules, macromolecules, and polymers, has enabled AMP with various device configurations and applications [45][46][47][48][49][50][51]. It is noted that there is another important constituent part in the field of AMP, which involves the synergistic integration of plasmonic nanostructures with active gain media, such as dye molecules [52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Active molecular plasmonics: tuning surface plasmon resonances by exploiting molecular dimensions

et al. 2015

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Molecular plasmonics explores and exploits the molecule-plasmon interactions on metal nanostructures to harness light at the nanoscale for nanophotonic spectroscopy and devices. With the functional molecules and polymers that change their structural, electrical, and/or optical properties in response to external stimuli such as electric fields and light, one can dynamically tune the plasmonic properties for enhanced or new applications, leading to a new research area known as active molecular plasmonics (AMP). Recent progress in molecular design, tailored synthesis, and self-assembly has enabled a variety of scenarios of plasmonic tuning for a broad range of AMP applications. Dimension (i.e., zero-, two-, and threedimensional) of the molecules on metal nanostructures has proved to be an effective indicator for defining the specific scenarios. In this review article, we focus on structuring the field of AMP based on the dimension of molecules and discussing the state of the art of AMP. Our perspective on the upcoming challenges and opportunities in the emerging field of AMP is also included.

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(Gold Nanorod Core)/(Polyaniline Shell) Plasmonic Switches with Large Plasmon Shifts and Modulation Depths

Cited by 137 publications

References 55 publications

An Optical Sensor with Polyaniline-Gold Hybrid Nanostructures for Monitoring pH in Saliva

An Optical Sensor with Polyaniline-Gold Hybrid Nanostructures for Monitoring pH in Saliva

Size controlled synthesis of gold nanostructures using ketones and their catalytic activity towards reduction of p-nitrophenol

Active molecular plasmonics: tuning surface plasmon resonances by exploiting molecular dimensions

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