Plasmon-mediated photochemical transformation of inorganic nanocrystals
TL;DR: A comprehensive and timely review on surface plasmonic nanostructures can be found in this article, where the authors summarized the principle of surface plasmons and its contribution in the growth, etching, and phase transition of inorganic nanocrystals.
About: This article is published in Applied Materials Today.The article was published on 2021-09-01. It has received 15 citations till now. The article focuses on the topics: Surface plasmon & Plasmon.
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TL;DR: In this article, the authors introduced chirality to plasmonic nanostructures by using circularly polarized light as the sole chiral source for the first time, which resulted in a wide variety of advanced technologies including image display, data storage, light management including negative refraction, and enantioselective catalysis and sensing.
Abstract: The chirality of materials results in a wide variety of advanced technologies including image display, data storage, light management including negative refraction, and enantioselective catalysis and sensing. Here, we introduce chirality to plasmonic nanostructures by using circularly polarized light as the sole chiral source for the first time. Gold nanocuboids as precursors on a semiconductor were irradiated with circularly polarized light to localize electric fields at specific corners of the cuboids depending on the handedness of light and deposited dielectric moieties as electron oscillation boosters by the localized electric field. Thus, plasmonic nanostructures with high chirality were developed. The present bottom-up method would allow the large-scale and cost-effective fabrication of chiral materials and further applications to functional materials and devices.
41 citations
TL;DR: In this article , an OECT based on co-doped polystyrenesulfonate (PEDOT:PSS) was presented, which achieved a significant enhancement of tran sconductance from 1.85 mS to 22.7 mS, due to the increase in volumetric capacitance (55.6 F cm-3 ) and conductivity (1015 S cm-1 ).
Abstract: Organic electrochemical transistors (OECTs), especially the ones with high transconductance, are highly promising in sensitive detection of chemical and biological species. However, it is still a great challenge to design and fabricate OECTs with very high transconductance. Herein, wereport an OECT with ultrahigh transconductance by introducing ionic liquid and dodecylbenzenesulfonate (DBSA) simultaneously in poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) as the semiconductive channel. Compared with the OECT based on pristine PEDOT:PSS, ourOECT based on co-doped PEDOT:PSS demonstrates a significant enhancement of tran sconductance from 1.85 mS to 22.7 mS, because of the increase in volumetric capacitance (55.6 F cm-3 ) and conductivity (1015 S cm-1 ). The enhanced transconductance is attributed to the DBSA-facilitated phase separation between the ionic liquid and PEDOT:PSS, which helps to form conductive domains of ionic liquid in PEDOT:PSS matrix, and the partially dispersion of ionic liquid in the PEDOT:PSS phase. Furthermore, by using the interdigitated electrodes as the source and drain electrodes, an ultrahigh transconductance of 180 mS is obtained, which is superior to that of the state-of-the-art OECTs. Because of the ultrahigh transconductance, the obtained OECT demonstrates sensitive detection of hydrogen peroxide and glucose, making it promissing in clinical diagnosis, health monitoring, and environmental surveillance. This article is protected by copyright. All rights reserved.
9 citations
TL;DR: In this article , using in situ Raman spectroscopy, the coadsorption of p-hydroxythiophenol (PHTP) molecules significantly accelerates the plasmon-mediated decarboxylation reaction of P-mercaptobenzoic acid adsorbed on silver nanoparticles.
Abstract: Surface plasmons have received much attention in chemical reactions because of their high light-utilizing efficiency, high reaction rate, and mild reaction conditions. However, the potential of plasmonic photochemistry has not been fully exploited, mainly due to the limited lifetime of plasmon-generated hot carriers. Herein, using in situ Raman spectroscopy, we reveal that the coadsorption of p-hydroxythiophenol (PHTP) molecules significantly accelerates the plasmon-mediated decarboxylation reaction of p-mercaptobenzoic acid adsorbed on silver nanoparticles. The observed boosting of the decarboxylation reaction is attributed to the matched energy distribution of the plasmon-generated hot electrons to the lowest unoccupied molecular orbital (LUMO) level of the coadsorbed PHTP molecules. Our findings will help not only to deepen the understanding of the plasmon-mediated chemical reactions but also to fabricate highly efficient plasmonic catalysts conveniently and cost-effectively.
8 citations
22 Oct 2021
5 citations
TL;DR: In this paper , photo-annealed plasmonic AuNP-doped PEDOT:PSS was used to improve the transconductance and cyclic stability of OECTs.
Abstract: Organic electrochemical transistors (OECTs), particularly the ones based on PEDOT:PSS, are excellent candidates for chemical and biological sensing because of their unique advantages. Improving the sensitivity and stability of OECTs is crucially important for practical applications. Herein, the transconductance of OECT is improved by 8-fold to 14.9 mS by doping the PEDOT:PSS channel with plasmonic gold nanoparticles (AuNPs) using a solution-based process followed by photo annealing. In addition, the OECT also possesses high flexibility and cyclic stability. It is revealed that the doping of AuNPs increases the conductivity of PEDOT:PSS and the photo annealing improves the crystallinity of the PEDOT:PSS channel and the interaction between AuNPs and PEDOT:PSS. These changes lead to the increase in transconductance and cyclic stability. The prepared OECTs are also demonstrated to be effective in sensitive detection of glucose within a wide concentration range of 10 nM-1 mM. Our OECTs based on photo-annealed plasmonic AuNP-doped PEDOT:PSS may find great applications in chemical and biological sensing, and this strategy may be extended to prepare many other high-performance OECT-based devices.
4 citations
References
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TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
Abstract: Surface plasmons are waves that propagate along the surface of a conductor. By altering the structure of a metal's surface, the properties of surface plasmons--in particular their interaction with light--can be tailored, which offers the potential for developing new types of photonic device. This could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved. Surface plasmons are being explored for their potential in subwavelength optics, data storage, light generation, microscopy and bio-photonics.
10,689 citations
TL;DR: It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.
Abstract: The production of hydrogen from water using a catalyst and solar energy is an ideal future energy source, independent of fossil reserves. For an economical use of water and solar energy, catalysts that are sufficiently efficient, stable, inexpensive and capable of harvesting light are required. Here, we show that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor. Contrary to other conducting polymer semiconductors, carbon nitride is chemically and thermally stable and does not rely on complicated device manufacturing. The results represent an important first step towards photosynthesis in general where artificial conjugated polymer semiconductors can be used as energy transducers.
9,751 citations
TL;DR: In this paper, the authors describe recent progress in the theory of nanoparticle optical properties, particularly methods for solving Maxwell's equations for light scattering from particles of arbitrary shape in a complex environment.
Abstract: The optical properties of metal nanoparticles have long been of interest in physical chemistry, starting with Faraday's investigations of colloidal gold in the middle 1800s. More recently, new lithographic techniques as well as improvements to classical wet chemistry methods have made it possible to synthesize noble metal nanoparticles with a wide range of sizes, shapes, and dielectric environments. In this feature article, we describe recent progress in the theory of nanoparticle optical properties, particularly methods for solving Maxwell's equations for light scattering from particles of arbitrary shape in a complex environment. Included is a description of the qualitative features of dipole and quadrupole plasmon resonances for spherical particles; a discussion of analytical and numerical methods for calculating extinction and scattering cross-sections, local fields, and other optical properties for nonspherical particles; and a survey of applications to problems of recent interest involving triangula...
9,086 citations
Journal Article•
TL;DR: In this paper, the authors look into the historical background, and present status and development prospects for photoelectrochemical cells, based on nanocrystalline materials and conducting polymer films.
Abstract: Until now, photovoltaics - the conversion of sunlight to electrical power - has been dominated by solid-state junction devices, often made of silicon. But this dominance is now being challenged by the emergence of a new generation of photovoltaic cells, based, for example, on nanocrystalline materials and conducting polymer films. These offer the prospect of cheap fabrication together with other attractive features, such as flexibility. The phenomenal recent progress in fabricating and characterizing nanocrystalline materials has opened up whole new vistas of opportunity. Contrary to expectation, some of the new devices have strikingly high conversion efficiencies, which compete with those of conventional devices. Here I look into the historical background, and present status and development prospects for this new generation of photoelectrochemical cells.
8,305 citations
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
Abstract: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties * To whom correspondence should be addressed. Phone, 404-8940292; fax, 404-894-0294; e-mail, mostafa.el-sayed@ chemistry.gatech.edu. † Case Western Reserve UniversitysMillis 2258. ‡ Phone, 216-368-5918; fax, 216-368-3006; e-mail, burda@case.edu. § Georgia Institute of Technology. 1025 Chem. Rev. 2005, 105, 1025−1102
6,852 citations