1
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Ye Z, Li Z, Feng J, Wu C, Fan Q, Chen C, Chen J, Yin Y. Dual-Responsive Fe 3O 4@Polyaniline Chiral Superstructures for Information Encryption. ACS NANO 2023; 17:18517-18524. [PMID: 37669537 DOI: 10.1021/acsnano.3c06461] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Incorporating stimuli-responsive mechanisms into chiral assemblies of nanostructures offers numerous opportunities to create optical materials capable of dynamically modulating their chiroptical properties. In this study, we demonstrate the formation of chiral superstructures by assembling Fe3O4@polyaniline hybrid nanorods by using a gradient magnetic field. The resulting superstructures exhibit a dual response to changes in both the magnetic field and solution pH, enabling dynamic regulation of the position, intensity, and sign of its circular dichroism peaks. Such responsiveness allows for convenient control over the optical rotatory dispersion properties of the assemblies, which are further integrated into the design of a chiroptical switch that can display various colors and patterns when illuminated with light of different wavelengths and polarization states. Finally, an optical information encryption system is constructed through the controlled assembly of the hybrid nanorods to showcase the potential opportunities for practical applications brought by the resulting responsive chiral superstructures.
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Affiliation(s)
- Zuyang Ye
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Zhiwei Li
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Ji Feng
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Chaolumen Wu
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Qingsong Fan
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Chen Chen
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Jinxing Chen
- Department of Chemistry, University of California, Riverside, California 92521, United States
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Yadong Yin
- Department of Chemistry, University of California, Riverside, California 92521, United States
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2
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Peng J, Lin Q, Földes T, Jeong HH, Xiong Y, Pitsalidis C, Malliaras GG, Rosta E, Baumberg JJ. In-Situ Spectro-Electrochemistry of Conductive Polymers Using Plasmonics to Reveal Doping Mechanisms. ACS NANO 2022; 16:21120-21128. [PMID: 36468680 PMCID: PMC9798863 DOI: 10.1021/acsnano.2c09081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Conducting polymers are a key component for developing wearable organic electronics, but tracking their redox processes at the nanoscale to understand their doping mechanism remains challenging. Here we present an in-situ spectro-electrochemical technique to observe redox dynamics of conductive polymers in an extremely localized volume (<100 nm3). Plasmonic nanoparticles encapsulated by thin shells of different conductive polymers provide actively tuned scattering color through switching their refractive index. Surface-enhanced Raman scattering in combination with cyclic voltammetry enables detailed studies of the redox/doping process. Our data intriguingly show that the doping mechanism varies with polymer conductivity: a disproportionation mechanism dominates in more conductive polymers, while sequential electron transfer prevails in less conductive polymers.
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Affiliation(s)
- Jialong Peng
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB30HE, U.K.
| | - Qianqi Lin
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB30HE, U.K.
| | - Tamás Földes
- Department
of Physics and Astronomy, University College
London, London WC1E 6BT, U.K.
| | - Hyeon-Ho Jeong
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB30HE, U.K.
| | - Yuling Xiong
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB30HE, U.K.
| | - Charalampos Pitsalidis
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB30AS, U.K.
| | - George G. Malliaras
- Electrical
Engineering Division, Department of Engineering, University of Cambridge, Cambridge CB30FA, U.K.
| | - Edina Rosta
- Department
of Physics and Astronomy, University College
London, London WC1E 6BT, U.K.
| | - Jeremy J. Baumberg
- NanoPhotonics
Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB30HE, U.K.
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3
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Ninakanti R, Dingenen F, Borah R, Peeters H, Verbruggen SW. Plasmonic Hybrid Nanostructures in Photocatalysis: Structures, Mechanisms, and Applications. Top Curr Chem (Cham) 2022; 380:40. [PMID: 35951165 DOI: 10.1007/s41061-022-00390-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/27/2022] [Indexed: 11/26/2022]
Abstract
(Sun)Light is an abundantly available sustainable source of energy that has been used in catalyzing chemical reactions for several decades now. In particular, studies related to the interaction of light with plasmonic nanostructures have been receiving increased attention. These structures display the unique property of localized surface plasmon resonance, which converts light of a specific wavelength range into hot charge carriers, along with strong local electromagnetic fields, and/or heat, which may all enhance the reaction efficiency in their own way. These unique properties of plasmonic nanoparticles can be conveniently tuned by varying the metal type, size, shape, and dielectric environment, thus prompting a research focus on rationally designed plasmonic hybrid nanostructures. In this review, the term "hybrid" implies nanomaterials that consist of multiple plasmonic or non-plasmonic materials, forming complex configurations in the geometry and/or at the atomic level. We discuss the synthetic techniques and evolution of such hybrid plasmonic nanostructures giving rise to a wide variety of material and geometric configurations. Bimetallic alloys, which result in a new set of opto-physical parameters, are compared with core-shell configurations. For the latter, the use of metal, semiconductor, and polymer shells is reviewed. Also, more complex structures such as Janus and antenna reactor composites are discussed. This review further summarizes the studies exploiting plasmonic hybrids to elucidate the plasmonic-photocatalytic mechanism. Finally, we review the implementation of these plasmonic hybrids in different photocatalytic application domains such as H2 generation, CO2 reduction, water purification, air purification, and disinfection.
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Affiliation(s)
- Rajeshreddy Ninakanti
- Sustainable Energy, Air and Water Technology (DuEL), Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Fons Dingenen
- Sustainable Energy, Air and Water Technology (DuEL), Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Rituraj Borah
- Sustainable Energy, Air and Water Technology (DuEL), Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Hannelore Peeters
- Sustainable Energy, Air and Water Technology (DuEL), Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Sammy W Verbruggen
- Sustainable Energy, Air and Water Technology (DuEL), Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.
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4
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Wang Y, Yang Y, Yang L, Lin Y, Tian Y, Ni Q, Wang S, Ju H, Guo J, Lu G. Gold Nanostar@Polyaniline Theranostic Agent with High Photothermal Conversion Efficiency for Photoacoustic Imaging-Guided Anticancer Phototherapy at a Low Dosage. ACS APPLIED MATERIALS & INTERFACES 2022; 14:28570-28580. [PMID: 35726862 DOI: 10.1021/acsami.2c05679] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Due to the strong and tunable photothermal effect, metallic nanoparticles are of enormous interest in light-activated biomedical applications, such as photoacoustic imaging (PAI) and photothermal therapy (PTT). However, the photothermal conversion efficiency (PCE) of existing metallic photothermal agents is still unsatisfactory. Herein, we develop an efficient photothermal theranostic agent based on a gold nanostar@polyaniline core-shell nanocomposite with high PCE for PAI-guided PTT at a low dosage. After optimizing the relative composition of polyaniline (PANI) and gold nanostars (AuNSs), this nanocomposite eventually empowers an outstanding PCE of up to 78.6%, which is much better than AuNSs or PANI alone and most of the existing photothermal theranostic agents. Besides, the nanocomposite can act as a targeted probe for tumors by hyaluronic acid (HA) modification without compromising the photothermal performance. The obtained nanoprobes named AuNSPHs exhibit promising biocompatibility and great performance of PAI-guided PTT to treat triple-negative breast cancer both in vitro and in vivo. More importantly, a single injection of AuNSPHs significantly suppresses tumor growth with a low dosage of Au (0.095 mg/kg), which is attributed to the high PCE of AuNSPHs. Taking advantage of the exhilarating photothermal conversion ability, this theranostic agent can safely potentiate the antitumor therapeutic efficacy of laser-induced ablation and holds great potential for future medical applications.
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Affiliation(s)
- Yuanzheng Wang
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
| | - Yuanjiao Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Liu Yang
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
| | - Yihang Lin
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
| | - Ying Tian
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
| | - Qianqian Ni
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
| | - Shouju Wang
- Department of Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210000, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Jingxing Guo
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Guangming Lu
- Department of Medical Imaging, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, P. R. China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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5
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Generalova AN, Oleinikov VA, Khaydukov EV. One-dimensional necklace-like assemblies of inorganic nanoparticles: Recent advances in design, preparation and applications. Adv Colloid Interface Sci 2021; 297:102543. [PMID: 34678536 DOI: 10.1016/j.cis.2021.102543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 01/12/2023]
Abstract
One-dimensional (1D) necklace-like assembly of inorganic nanoparticles exhibits unique collective properties, which are critical to open up new and remarkable opportunities in the field of nanotechnology. This review focuses on the recent advances in the production of these types of assemblies employing two strategies: colloidal synthesis and self-assembly procedures. After a brief description of the forces guiding nanoparticles towards the assembly, the main features of both strategies are discussed. Examples of approaches, typically involved in colloidal synthesis, are highlighted. The peculiar properties of 1D nanostructures are strictly associated with the nanoparticle arrangement in the form of highly ordered assemblies, which are attained during the synthesis both in the solution and using a template, as well as under the action of an external force. The various 1D necklace-like structures, created through nanoparticle self-assembly, demonstrate aligned, oriented nanoparticle organization. Diverse nature, size and shape of preformed particles as building blocks, along with utilizing different linkers, templates or external field lead to fabrication of 1D chain nanostructures with properties responsible for their wide applications. The unique structure-property relationship, both in colloidal synthesis, and self-assembly, offers broad spectrum of 1D necklace-like nanostructure implementations, illustrated by their use in photonics, electronics, electrocatalysis, magnetics.
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6
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Wang L, Qiu P, Yang T, Zhou N, Zhai M, Li Y, Zhou Y, Zou S, Yang M, Mao C. 3D Bacterial flagella as both synthetic biotemplates and ultrathin spacers for enhanced inter-particle coupling and solar energy harvesting. MATERIALS HORIZONS 2021; 8:2097-2105. [PMID: 34846487 DOI: 10.1039/d1mh00227a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Linear light-absorbing nanomaterials are ideal for film-based solar harvesting applications as they form porous structures that can maximize the absorption and minimize the reflection of the solar light. Conventional 1D nanochains of plasmonic nanoparticle assemblies can achieve significantly broadened optical absorption through surface plasmon coupling, but their optical bands are still not broad enough to absorb through the solar spectrum and thus are not efficient solar absorbers. Here we discovered first by simulation that 3D structured nanochains of plasmonic nanoparticles presented a remarkably increased optical broadening effect and much longer redshift of the optical peaks due to the enhanced inter-particle coupling effect. Then we fabricated 3D nanochains by assembling gold nanoparticles (AuNPs) around 14 nm ultrathin bionanofibers, the bacterial flagella. The ultrathin biotemplates enabled the 3D arrangement of 50 nm AuNPs along the nanofiber with a very small inter-particle gap, allowing the strong coupling of surface plasmons in a 3D manner. Consistent with the theoretical prediction, the 3D nanochains, when assembled into films, could effectively convert nearly the full spectrum of solar energy into heat, which was further efficiently converted into electricity through a thermoelectric generation unit. Our work represents a nanobiomaterial approach to highly efficient solar thermal power generation.
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Affiliation(s)
- Lin Wang
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019-5300, USA.
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7
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Khan GA, Demirtaş Ö, Demir AK, Aytekin Ö, Bek A, Bhatti AS, Ahmed W. Fabrication of flexible, cost-effective, and scalable silver substrates for efficient surface enhanced Raman spectroscopy based trace detection. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Liu H, Huang P, Wu FY, Ma L. Colorimetric determination of acid phosphatase activity and inhibitor screening based on in situ polymerization of aniline catalyzed by gold nanoparticles. Mikrochim Acta 2021; 188:155. [PMID: 33822286 DOI: 10.1007/s00604-021-04799-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/19/2021] [Indexed: 02/03/2023]
Abstract
A colorimetric assay for acid phosphatase (ACP) was constructed that is based on in situ polymerization of aniline catalyzed by gold nanoparticles (AuNPs). Aniline can be polymerized by ammonium persulfate (APS) in acidic condition and form gold-polyaniline core-shell nanoparticles (Au@PANI NPs) in the presence of AuNPs with the assistance of sodium dodecyl sulfate (SDS). AuNPs were also found to accelerate the polymerization process of aniline and thus shorten the reaction time. Upon the introduction of ascorbic acid (AA), the oxidant APS was consumed via the redox reaction. That led to the suppression of the formation of PANI. Consequently, ACP activity can be supervised on the basis of hydrolysis of 2-phospho-L-ascorbic acid trisodium salt (AAP) catalyzed by ACP to release AA. With the increase of ACP activity, the intensity ratio of the absorbance at λ705 nm (A705) and the absorbance at λ530 nm (A530) gradually decreased and the color gradually changed from dark-green to light-green to blue-gray to purple and eventually to pink. This method for ACP determination worked in the range 0.40 to 2.00 U·L-1. The detection limit is 0.043 U·L-1. The assay was applied to determine ACP in human serum. The recovery ranged from 81.0 to 104.6%. Relative standard deviation was less than 5%. This suits the request for biological sample analysis. Graphical abstract Schematic presentation of the colorimetric determination of acid phosphatase activity and inhibitor screening based on in situ polymerization of aniline catalyzed by gold nanoparticles. : acid phosphatase (ACP); : gold nanoparticles (AuNPs); : gold-polyaniline core-shell nanoparticles (Au@PANI NPs); ascorbic acid (AA); 2-phospho-L-ascorbic acid trisodium salt (AAP).
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Affiliation(s)
- Hui Liu
- College of Chemistry, Nanchang University, Nanchang, 330031, China
| | - Pengcheng Huang
- College of Chemistry, Nanchang University, Nanchang, 330031, China. .,Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang, 330031, China.
| | - Fang-Ying Wu
- College of Chemistry, Nanchang University, Nanchang, 330031, China. .,Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang, 330031, China.
| | - Lihua Ma
- College of Science and Engineering, University of Houston at Clear Lake, 2700 Bay Area Blvd, Houston, TX, 77058, USA
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Peng J, Jeong H, Smith M, Chikkaraddy R, Lin Q, Liang H, De Volder MFL, Vignolini S, Kar‐Narayan S, Baumberg JJ. FullyPrinted Flexible Plasmonic Metafilms with Directional Color Dynamics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2002419. [PMID: 33511008 PMCID: PMC7816707 DOI: 10.1002/advs.202002419] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/22/2020] [Indexed: 05/29/2023]
Abstract
Plasmonic metafilms have been widely utilized to generate vivid colors, but making them both active and flexible simultaneously remains a great challenge. Here flexible active plasmonic metafilms constructed by printing electrochromic nanoparticles onto ultrathin metal films (<15 nm) are presented, offering low-power electricallydriven color switching. In conjunction with commercially available printing techniques, such flexible devices can be patterned using lithography-free approaches, opening up potential for fullyprinted electrochromic devices. Directional optical effects and dynamics show perceived upward and downward colorations can differ, arising from the dissimilar plasmonic mode excitation between nanoparticles and ultrathin metal films.
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Affiliation(s)
- Jialong Peng
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
| | - Hyeon‐Ho Jeong
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
- Present address:
School of Electrical Engineering and Computer ScienceGwangju Institute of Science and TechnologyGwangju61005Republic of Korea
| | - Michael Smith
- Department of Materials Science & MetallurgyUniversity of CambridgeCambridgeCB3 0FSUK
| | - Rohit Chikkaraddy
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
| | - Qianqi Lin
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
| | - Hsin‐Ling Liang
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
- Institute for ManufacturingDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FSUK
| | - Michael F. L. De Volder
- Institute for ManufacturingDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FSUK
| | - Silvia Vignolini
- Department of ChemistryUniversity of CambridgeCambridgeCB2 1EWUK
| | - Sohini Kar‐Narayan
- Department of Materials Science & MetallurgyUniversity of CambridgeCambridgeCB3 0FSUK
| | - Jeremy J. Baumberg
- NanoPhotonics Centre, Cavendish LaboratoryUniversity of CambridgeCambridgeCB3 0HEUK
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Lin H, Song L, Huang Y, Cheng Q, Yang Y, Guo Z, Su F, Chen T. Macroscopic Au@PANI Core/Shell Nanoparticle Superlattice Monolayer Film with Dual-Responsive Plasmonic Switches. ACS APPLIED MATERIALS & INTERFACES 2020; 12:11296-11304. [PMID: 32043861 DOI: 10.1021/acsami.0c01983] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The self-assembled gold nanoparticle (NP) superlattice displays unusual but distinctive features such as high mechanical and free-standing performance, electrical conductivity, and plasmonic properties, which are widely employed in various applications especially in biological diagnostics and optoelectronic devices. For a two-dimensional (2D) superlattice monolayer film composed of a given metal nanostructure, it is rather challenging to tune either its plasmonic properties or its optical properties in a reversible way, and it has not been reported. It is therefore of significant value to construct a free-standing 2D superlattice monolayer film of gold nanoparticles with an intelligent response and desired functions. Herein, we developed an easy and efficient approach to construct a gold nanoparticle superlattice film with a dual-responsive plasmonic switch. In this system, gold nanoparticles were coated by polyaniline (PANI) and then interracially self-assembled into a monolayer film at the air-liquid interface. The PANI shell plays two important roles in the superlattice monolayer film. First, the PANI shell acts as a physical spacer to provide a steric hindrance to counteract the van der Waals (vdW) attraction between densely packed nanoparticles (NPs), resulting in the formation of a superlattice by adjusting the thickness of the PANI shell. Second, the PANI shells provide the superlattice film with multiple stimuli such as electrical potential and pH change, leading to reversible optical and plasmonic responsiveness. The superlattice monolayer film can show a vivid color change from olive green to pink, or from olive green to violet by the change of the corresponding stimuli. Also, the localized surface plasmonic resonance (LSPR) of the superlattice monolayer film can be reversibly modulated by both by changing the local pH and applying an electric potential. Notably, a significant plasmonic shift of 157 nm can be achieved in the superlattice monolayer film when the PANI shell with a thickness of 35 nm and gold nanorods as a core were used. The superlattice monolayer film with dual-responsive plasmonic switches is promising for a range of potential applications in optoelectronic devices, plasmonic and colorimetric sensors, and surface-enhanced Raman scattering (SERS).
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Affiliation(s)
- Han Lin
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 311121, P. R. China
- China State Key Laboratory for Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
| | - Liping Song
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Youju Huang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 311121, P. R. China
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Qian Cheng
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Yanping Yang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Zhiyong Guo
- China State Key Laboratory for Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
| | - Fengmei Su
- National Engineering Research Centre for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, P. R. China
| | - Tao Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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11
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Cai Y, Zhang Y, Ji S, Ye Y, Wu S, Liu J, Chen S, Liang C. Laser ablation in liquids for the assembly of Se@Au chain-oligomers with long-term stability for photothermal inhibition of tumor cells. J Colloid Interface Sci 2020; 566:284-295. [PMID: 32007739 DOI: 10.1016/j.jcis.2020.01.098] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/13/2020] [Accepted: 01/24/2020] [Indexed: 10/25/2022]
Abstract
For the potential use of Au nanoparticles (NPs) in photothermal therapy, it is important and effective to achieve the uniaxial assembly of Au NPs to allow enhanced absorption in the near infrared (NIR) region. Herein, we first presented the construction of amorphous selenium encapsulated gold (Se@Au) chain-oligomers by successive laser ablation of Au and Se targets in sodium chloride solution without other toxic precursors, stabilizers, or templating molecules. Se@Au chain-oligomers showed evidently enhanced NIR absorption and excellent photothermal transduction efficiency (η), which was higher than 47% at 808 nm. After being stored for 1 year, the Se@Au colloids still exhibited outstanding photothermal performance. The cytotoxicity assay demonstrated that there is negligible toxicity of Se@Au chain-oligomers in cells, but cell viability declined to only 1% in phototherapeutic experiments that were implemented in vitro. In intracellular Reactive Oxygen Species (ROS) generation measurements, Se@Au chain-oligomers could trigger a 35.9% increment of ROS upon laser irradiation. The possible synergetic effects between the anticancer function of Se and photothermal behaviors of Se@Au oligomers were intended to increase ROS level in cells. Therefore, such designed Se@Au chain-oligomers of high stability exhibit promising potential for their use as in vivo photothermal therapeutic agents.
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Affiliation(s)
- Yunyu Cai
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China.
| | - Yajun Zhang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Sihan Ji
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Yixing Ye
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Shouliang Wu
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Jun Liu
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Shaopeng Chen
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
| | - Changhao Liang
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
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12
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Yi C, Yang Y, Liu B, He J, Nie Z. Polymer-guided assembly of inorganic nanoparticles. Chem Soc Rev 2019; 49:465-508. [PMID: 31845685 DOI: 10.1039/c9cs00725c] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The self-assembly of inorganic nanoparticles is of great importance in realizing their enormous potentials for broad applications due to the advanced collective properties of nanoparticle ensembles. Various molecular ligands (e.g., small molecules, DNAs, proteins, and polymers) have been used to assist the organization of inorganic nanoparticles into functional structures at different hierarchical levels. Among others, polymers are particularly attractive for use in nanoparticle assembly, because of the complex architectures and rich functionalities of assembled structures enabled by polymers. Polymer-guided assembly of nanoparticles has emerged as a powerful route to fabricate functional materials with desired mechanical, optical, electronic or magnetic properties for a broad range of applications such as sensing, nanomedicine, catalysis, energy storage/conversion, data storage, electronics and photonics. In this review article, we summarize recent advances in the polymer-guided self-assembly of inorganic nanoparticles in both bulk thin films and solution, with an emphasis on the role of polymers in the assembly process and functions of resulting nanostructures. Precise control over the location/arrangement, interparticle interaction, and packing of inorganic nanoparticles at various scales are highlighted.
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Affiliation(s)
- Chenglin Yi
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
| | - Yiqun Yang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
| | - Ben Liu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu 210023, China and Department of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06268, USA.
| | - Jie He
- Department of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06268, USA.
| | - Zhihong Nie
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
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13
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Choi CKK, Chiu YTE, Zhuo X, Liu Y, Pak CY, Liu X, Tse YLS, Wang J, Choi CHJ. Dopamine-Mediated Assembly of Citrate-Capped Plasmonic Nanoparticles into Stable Core-Shell Nanoworms for Intracellular Applications. ACS NANO 2019; 13:5864-5884. [PMID: 31038921 DOI: 10.1021/acsnano.9b01591] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Plasmonic nanochains, derived from the one-dimensional assembly of individual plasmonic nanoparticles (NPs), remain infrequently explored in biological investigations due to their limited colloidal stability, ineffective cellular uptake, and susceptibility to intracellular disassembly. We report the synthesis of polydopamine (PDA)-coated plasmonic "nanoworms" (NWs) by sonicating citrate-capped gold (Cit-Au) NPs in a concentrated dopamine (DA) solution under alkaline conditions. DA mediates the assembly of Cit-Au NPs into Au NWs within 1 min, and subsequent self-polymerization of DA for 60 min enables the growth of an outer conformal PDA shell that imparts stability to the inner Au NW structure in solution, yielding "core-shell" Au@PDA NWs with predominantly 4-5 Au cores per worm. Our method supports the preparation of monometallic Au@PDA NWs with different core sizes and bimetallic PDA-coated NWs with Au and silver cores. The protonated primary amine and catechol groups of DA, with their ability to interact with Cit anions via hydrogen bonding and electrostatic attraction, are critical to assembly. When compared to unassembled PDA-coated Au NPs, our Au@PDA NWs scatter visible light and absorb near-infrared light more intensely and enter HeLa cancer cells more abundantly. Au@PDA NWs cross the cell membrane as intact entities primarily via macropinocytosis, mostly retain their inner NW structure and outer PDA shell inside the cell for 24 h, and do not induce noticeable cytotoxicity. We showcase three intracellular applications of Au@PDA NWs, including label-free dark-field scattering cell imaging, delivery of water-insoluble cargos without pronounced localization in acidic compartments, and photothermal killing of cancer cells.
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14
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Simoncelli S, Pensa EL, Brick T, Gargiulo J, Lauri A, Cambiasso J, Li Y, Maier SA, Cortés E. Monitoring plasmonic hot-carrier chemical reactions at the single particle level. Faraday Discuss 2019; 214:73-87. [PMID: 30810127 DOI: 10.1039/c8fd00138c] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Plasmon excitation in metal nanoparticles triggers the generation of highly energetic charge carriers that, when properly manipulated and exploited, can mediate chemical reactions. Single-particle techniques are key to unearthing the underlying mechanisms of hot-carrier generation, transport and injection, as well as to disentangling the role of the temperature increase and the enhanced near-field at the nanoparticle-molecule interface. Gaining nanoscopic insight into these processes and their interplay could aid in the rational design of plasmonic photocatalysts. Here, we present three different approaches to monitor hot-carrier reactivity at the single-particle level. We use a combination of dark-field microscopy and photoelectrochemistry to track a hot-hole driven reaction on a single Au nanoparticle. We image hot-electron reactivity with sub-particle spatial resolution using nanoscopy techniques. Finally, we push the limits by looking for a hot-electron induced chemical reaction that generates a fluorescent product, which should enable imaging plasmonic photocatalysis at the single-particle and single-molecule levels.
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Affiliation(s)
- Sabrina Simoncelli
- The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.
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15
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Fabrication of Au-Conjugated Polymer Hybridized Nanoparticles and Their Optical Properties. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2018. [DOI: 10.1380/ejssnt.2018.436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Yan M, Wang N, Zhong B, Cheng X, Wang H, Chen H. A general approach for encapsulating organic crystals in a polyaniline shell. NANOSCALE 2018; 10:21001-21005. [PMID: 30411102 DOI: 10.1039/c8nr07284a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The hydrophobicity and instability of organic crystals restrict their further applications. Here, we present a general and scalable method to encapsulate different organic crystals in a conductive polyaniline (PANI) shell. The shell significantly improves the stability and dispersity of the nanocrystals, without compromising their luminescence intensity.
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Affiliation(s)
- Miao Yan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
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17
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Asapu R, Ciocarlan RG, Claes N, Blommaerts N, Minjauw M, Ahmad T, Dendooven J, Cool P, Bals S, Denys S, Detavernier C, Lenaerts S, Verbruggen SW. Plasmonic Near-Field Localization of Silver Core-Shell Nanoparticle Assemblies via Wet Chemistry Nanogap Engineering. ACS APPLIED MATERIALS & INTERFACES 2017. [PMID: 29119785 DOI: 10.1021/acsanm.9b00485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Silver nanoparticles are widely used in the field of plasmonics because of their unique optical properties. The wavelength-dependent surface plasmon resonance gives rise to a strongly enhanced electromagnetic field, especially at so-called hot spots located in the nanogap in-between metal nanoparticle assemblies. Therefore, the interparticle distance is a decisive factor in plasmonic applications, such as surface-enhanced Raman spectroscopy (SERS). In this study, the aim is to engineer this interparticle distance for silver nanospheres using a convenient wet-chemical approach and to predict and quantify the corresponding enhancement factor using both theoretical and experimental tools. This was done by building a tunable ultrathin polymer shell around the nanoparticles using the layer-by-layer method, in which the polymer shell acts as the separating interparticle spacer layer. Comparison of different theoretical approaches and corroborating the results with SERS analytical experiments using silver and silver-polymer core-shell nanoparticle clusters as SERS substrates was also done. Herewith, an approach is provided to estimate the extent of plasmonic near-field enhancement both theoretically as well as experimentally.
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Affiliation(s)
- Ramesh Asapu
- Department of Bioscience Engineering, Campus Groenenborger, University of Antwerp , Groenenborgerlaan 171, Antwerp 2020, Belgium
| | - Radu-George Ciocarlan
- Department of Chemistry, Campus Drie Eiken, University of Antwerp , Antwerp 2610, Belgium
| | - Nathalie Claes
- Department of Physics, Campus Groenenborger, University of Antwerp , Antwerp 2020, Belgium
| | - Natan Blommaerts
- Department of Bioscience Engineering, Campus Groenenborger, University of Antwerp , Groenenborgerlaan 171, Antwerp 2020, Belgium
| | - Matthias Minjauw
- Department of Solid State Sciences, Ghent University , Ghent 9000, Belgium
| | - Tareq Ahmad
- Department of Solid State Sciences, Ghent University , Ghent 9000, Belgium
| | - Jolien Dendooven
- Department of Solid State Sciences, Ghent University , Ghent 9000, Belgium
| | - Pegie Cool
- Department of Chemistry, Campus Drie Eiken, University of Antwerp , Antwerp 2610, Belgium
| | - Sara Bals
- Department of Physics, Campus Groenenborger, University of Antwerp , Antwerp 2020, Belgium
| | - Siegfried Denys
- Department of Bioscience Engineering, Campus Groenenborger, University of Antwerp , Groenenborgerlaan 171, Antwerp 2020, Belgium
| | | | - Silvia Lenaerts
- Department of Bioscience Engineering, Campus Groenenborger, University of Antwerp , Groenenborgerlaan 171, Antwerp 2020, Belgium
| | - Sammy W Verbruggen
- Department of Bioscience Engineering, Campus Groenenborger, University of Antwerp , Groenenborgerlaan 171, Antwerp 2020, Belgium
- Center for Surface Chemistry and Catalysis, KU Leuven , Leuven 3000, Belgium
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18
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Tang P, Jiang X, Wang Y, Chen H, Zhang YS, Gao P, Wang H, Li X, Zhou J. Plasmonic Nanoprobe of (Gold Triangular Nanoprism Core)/(Polyaniline Shell) for Real-Time Three-Dimensional pH Imaging of Anterior Chamber. Anal Chem 2017; 89:9758-9766. [PMID: 28809545 DOI: 10.1021/acs.analchem.7b01623] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three-dimensional (3D) molecular imaging enables the study of biological processes in both living and nonviable systems at the molecular level and has a high potential on early diagnosis. In conjunction with specific molecular probes, optical coherent tomography (OCT) is a promising imaging modality to provide 3D molecular features at the tissue level. In this study, we introduced (gold triangular nanoprism core)/(polyaniline shell) nanoparticles (GTNPs@PANI) as an OCT contrast agent and pH-responsive nanoprobe for 3D imaging of pH distribution. These core/shell nanoparticles possessed significantly different extinction and scattering properties in acidic and basic microenvironments. The switch of the optical features of the nanoparticles upon pH change was reversible, and the response time was less than 1.0 s. The nanoprobe successfully indicated the acid regions of a mimic tumor from the basic region in a gelatin-based phantom under OCT imaging. As a demonstration of practical applications, real-time 3D OCT imaging of pH and lactic acid in the anterior chamber of a fish eye was realized by GTNPs@PANI nanoparticles. Using GTNPs@PANI nanoparticles as the contrast probes for OCT imaging, noninvasive and real-time molecular imaging in both living and nonviable systems at the microscale can be achieved.
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Affiliation(s)
| | | | | | | | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School , Cambridge, Massachusetts 02139, United States
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19
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Han J, Wang M, Hu Y, Zhou C, Guo R. Conducting polymer-noble metal nanoparticle hybrids: Synthesis mechanism application. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.04.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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20
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Gitipour A, Al-Abed SR, Thiel SW, Scheckel KG, Tolaymat T. Nanosilver as a disinfectant in dental unit waterlines: Assessment of the physicochemical transformations of the AgNPs. CHEMOSPHERE 2017; 173:245-252. [PMID: 28110014 PMCID: PMC6143180 DOI: 10.1016/j.chemosphere.2017.01.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/06/2017] [Accepted: 01/08/2017] [Indexed: 05/29/2023]
Abstract
Dental unit water lines (DUWL) are susceptible to biofilm development and bacterial growth leading to water contamination, causing health and ecological effects. This study monitors the interactions between a commonly used nanosilver disinfectant (ASAP-AGX-32, an antimicrobial cleaner for dental units, 0.0032% Ag) and biofilm development in DUWL. To simulate the disinfection scenario, an in-house DUWL model was assembled and biofilm accumulation was allowed. Subsequent to biofilm development, the disinfection process was performed according to the manufacturer's instructions. The pristine nanosilver particles in the cleaner measured between 3 and 5 nm in diameter and were surrounded by a stabilizing polymer. However, the polymeric stabilizing agent diminished over the disinfection process, initiating partial AgNPs aggregation. Furthermore, surface speciation of the pristine AgNPs were identified as primarily AgO, and after the disinfection process, transformations to AgCl were observed. The physicochemical characteristics of AgNPs are known to govern their fate, transport and environmental implications. Hence, knowledge of the AgNPs characteristics after the disinfection process (usage scenario) is of significance. This study demonstrates the adsorption of AgNPs onto biofilm surfaces and, therefore, will assist in illustration of the toxicity mechanisms of AgNPs to bacteria and biofilms. This work can be an initial step in better understanding how AgNPs transform depending on the conditions they are exposed to during their lifetime. Until this date, most research has been focused on assessing the impacts of pristine (lab synthesized) nanomaterials on various systems. However, it is our belief that nanoparticles may undergo transformations during usage, which must be taken into consideration. Furthermore, this experiment is unique as it was conducted with a commonly used, commercially available nanosilver suspension leading to more realistic and applicable findings.
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Affiliation(s)
- Alireza Gitipour
- Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Souhail R Al-Abed
- US EPA, Office of Research and Development, National Risk Management Laboratory, Cincinnati, OH, USA.
| | - Stephen W Thiel
- Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Kirk G Scheckel
- US EPA, Office of Research and Development, National Risk Management Laboratory, Cincinnati, OH, USA
| | - Thabet Tolaymat
- US EPA, Office of Research and Development, National Risk Management Laboratory, Cincinnati, OH, USA
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21
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Lu W, Jiang N, Wang J. Active Electrochemical Plasmonic Switching on Polyaniline-Coated Gold Nanocrystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604862. [PMID: 28004862 DOI: 10.1002/adma.201604862] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/19/2016] [Indexed: 06/06/2023]
Abstract
High-performance electrochemical plasmonic switching is realized on both single-particle and ensemble levels by coating polyaniline on colloidal gold nanocrystals through surfactant-assisted oxidative polymerization. Under small applied potentials, the core@shell nanostructures exhibit reversible plasmon shifts as large as 150 nm, a switching time of less than 10 ms, and a high switching stability.
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Affiliation(s)
- Wenzheng Lu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Nina Jiang
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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22
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Yin A, He Q, Lin Z, Luo L, Liu Y, Yang S, Wu H, Ding M, Huang Y, Duan X. Plasmonic/Nonlinear Optical Material Core/Shell Nanorods as Nanoscale Plasmon Modulators and Optical Voltage Sensors. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Gebeyehu MB, Chang YH, Abay AK, Chang SY, Lee JY, Wu CM, Chiang TC, Murakami RI. Fabrication and characterization of continuous silver nanofiber/polyvinylpyrrolidone (AgNF/PVP) core–shell nanofibers using the coaxial electrospinning process. RSC Adv 2016. [DOI: 10.1039/c6ra05869h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Core–shell silver nanofiber/polyvinylpyrrolidone (AgNF/PVP) nanofibers have been successfully fabricated via an efficient coaxial-spinneret electrospinning method with a vertical configuration using PVP and AgNO3 as precursor solutions.
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Affiliation(s)
- Molla Bahiru Gebeyehu
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Yu-Hao Chang
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Angaw Kelemework Abay
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Shao-Yen Chang
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Jiunn-Yih Lee
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Chang-Mou Wu
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Tai-Chin Chiang
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
| | - Ri-Ichi Murakami
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Republic of China
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24
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Li J, Yoon SJ, Hsieh BY, Tai W, O'Donnell M, Gao X. Stably Doped Conducting Polymer Nanoshells by Surface Initiated Polymerization. NANO LETTERS 2015; 15:8217-8222. [PMID: 26588215 DOI: 10.1021/acs.nanolett.5b03728] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Despite broad applications ranging from electronics to biomedical sensing and imaging, a long-standing problem of conducting polymers is the poor resistance to dedoping, which directly affects their signature electrical and optical properties. This problem is particularly significant for biomedical uses because of fast leaching of dopant ions in physiological environments. Here, we describe a new approach to engineer multimodal core-shell nanoparticles with a stably doped conductive polymer shell in biological environments. It was achieved by making a densely packed polymer brush rather than changing its molecular structure. Polyaniline (PANI) was used as a model compound due to its concentrated near-infrared (NIR) absorption. It was grafted onto a magnetic nanoparticle via a polydopamine intermediate layer. Remarkably, at pH 7 its conductivity is ca. 2000× higher than conventional PANI nanoshells. Similarly, its NIR absorption is enhanced by 2 orders of magnitude, ideal for photothermal imaging and therapy. Another surprising finding is its nonfouling property, even outperforming polyethylene glycol. This platform technology is also expected to open exciting opportunities in engineering stable conductive materials for electronics, imaging, and sensing.
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Affiliation(s)
- Junwei Li
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Soon Joon Yoon
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Bao-Yu Hsieh
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Wanyi Tai
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Matthew O'Donnell
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Xiaohu Gao
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
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25
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Yin A, He Q, Lin Z, Luo L, Liu Y, Yang S, Wu H, Ding M, Huang Y, Duan X. Plasmonic/Nonlinear Optical Material Core/Shell Nanorods as Nanoscale Plasmon Modulators and Optical Voltage Sensors. Angew Chem Int Ed Engl 2015; 55:583-7. [DOI: 10.1002/anie.201508586] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 10/29/2015] [Indexed: 11/08/2022]
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26
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Tian C, Du Y, Xu P, Qiang R, Wang Y, Ding D, Xue J, Ma J, Zhao H, Han X. Constructing Uniform Core-Shell PPy@PANI Composites with Tunable Shell Thickness toward Enhancement in Microwave Absorption. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20090-20099. [PMID: 26322386 DOI: 10.1021/acsami.5b05259] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Highly uniform core-shell composites, polypyrrole@polyaniline (PPy@PANI), have been successfully constructed by directing the polymerization of aniline on the surface of PPy microspheres. The thickness of PANI shells, from 30 to 120 nm, can be well controlled by modulating the weight ratio of aniline and PPy microspheres. PPy microspheres with abundant carbonyl groups have very strong affinity to the conjugated chains of PANI, which is responsible for the spontaneous formation of uniform core-shell microstructures. However, the strong affinity between PPy microspheres and PANI shells does not promote the diffusion or reassembly of two kinds of conjugated chains. Coating PPy microspheres with PANI shells increases the complex permittivity and creates the mechanism of interfacial polarization, where the latter plays an important role in increasing the dielectric loss of PPy@PANI composites. With a proper thickness of PANI shells, the moderate dielectric loss will produce well matched characteristic impedance, so that the microwave absorption properties of these composites can be greatly enhanced. Although PPy@PANI composites herein consume the incident electromagnetic wave by absolute dielectric loss, their performances are still superior or comparable to most PANI-based composites ever reported, indicating that they can be taken as a new kind of promising lightweight microwave absorbers. More importantly, microwave absorption of PPy@PANI composites can be simply modulated not only by the thickness of the absorbers, but also the shell thickness to satisfy the applications in different frequency bands.
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Affiliation(s)
- Chunhua Tian
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
| | - Yunchen Du
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology , Harbin 150001, China
- HIT-HAS Laboratory of High-Energy Chemistry and Interdisciplinary Science, Harbin Institute of Technology , Harbin 150001, China
| | - Ping Xu
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
| | - Rong Qiang
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
| | - Ying Wang
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
| | - Ding Ding
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
| | - Jianlei Xue
- Physics Section, Medical Technology Department, Qiqihar Medical University , Qiqihar, Heilongjiang 161006, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology , Harbin 150001, China
| | - Hongtao Zhao
- HIT-HAS Laboratory of High-Energy Chemistry and Interdisciplinary Science, Harbin Institute of Technology , Harbin 150001, China
- Institute of Technical Physics, Heilongjiang Academy of Sciences , Harbin 150009, China
| | - Xijiang Han
- Department of Chemistry, Harbin Institute of Technology , Harbin 150001, China
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27
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Tisserant JN, Reissner PA, Beyer H, Fedoryshyn Y, Stemmer A. Water-Mediated Assembly of Gold Nanoparticles into Aligned One-Dimensional Superstructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7220-7. [PMID: 26072942 DOI: 10.1021/acs.langmuir.5b01135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This Article shows that water in ethanol colloids of gold nanoparticles enhances the formation of linear clusters and, more important for applications in electronics, determines their assembly on surfaces. We show by dynamic light scattering that ethanol colloids contain mainly monomers and dimers and that wormlike superstructures are mostly absent, despite UV-vis evidence of aggregation. Water added to the colloid as a cosolvent was found to enhance the number of clusters as well as their average size, confirming its role in linear self-assembly, on the scale of a few particles. Water adsorbed from the atmosphere during coating was also found to be a powerful lever to tune self-assembly on surfaces. By varying the relative humidity, a sharp transition from branched to linear superstructures was observed, showing the importance of water as a cosolvent in the formation of cluster superstructures. We show that one-dimensional superstructures may form due to long-range mobility of precursor clusters on wet surfaces, allowing their rearrangement. The understanding of the phenomenon allows us to statistically align both clusters and resulting superstructures on patterned substrates, opening the way to rapid screening in molecular electronics.
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Affiliation(s)
| | - Patrick A Reissner
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
| | - Hannes Beyer
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
| | - Yuriy Fedoryshyn
- ‡Institute of Electromagnetic Fields, ETH Zurich, Gloriastrasse 35, CH-8092 Zurich, Switzerland
| | - Andreas Stemmer
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
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28
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Qiao X, Liu X, Li X, Xing S. Anchoring gold nanoparticles inside polyaniline shells with magnetic cores for the enhancement of catalytic stability. NEW J CHEM 2015. [DOI: 10.1039/c5nj01798j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Owing to the protection effect and stability of polyaniline, the yolk–shell nanostructured Fe3O4@Au–polyaniline illustrated enhanced catalytic stability.
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Affiliation(s)
- Xiaoguang Qiao
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P.R. China
| | - Xianchun Liu
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P.R. China
| | - Xiaoting Li
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P.R. China
| | - Shuangxi Xing
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P.R. China
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Hou H, Chen L, He H, Chen L, Zhao Z, Jin Y. Fine-tuning the LSPR response of gold nanorod–polyaniline core–shell nanoparticles with high photothermal efficiency for cancer cell ablation. J Mater Chem B 2015; 3:5189-5196. [DOI: 10.1039/c5tb00556f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Fine-tuning the LSPR response of Au nanorod–polyaniline core–shell nanoparticles can achieve high photothermal efficiency and stability for cancer cell ablation.
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Affiliation(s)
- Hui Hou
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Limei Chen
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Haili He
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Lizhen Chen
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Zhenlu Zhao
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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30
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Du C, Wang A, Fei J, Zhao J, Li J. Polypyrrole-stabilized gold nanorods with enhanced photothermal effect towards two-photon photothermal therapy. J Mater Chem B 2015; 3:4539-4545. [DOI: 10.1039/c5tb00560d] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The core–shell composite of Au–polypyrrole nanorods with high two-photon photothermal effect and stability could efficiently kill tumor cells under irradiation.
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Affiliation(s)
- Cuiling Du
- National Center for Nanoscience and Technology
- Zhong guan cun
- Beijing
- China
| | - Anhe Wang
- National Center for Nanoscience and Technology
- Zhong guan cun
- Beijing
- China
| | - Jinbo Fei
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface Science and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jie Zhao
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface Science and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Junbai Li
- National Center for Nanoscience and Technology
- Zhong guan cun
- Beijing
- China
- Beijing National Laboratory for Molecular Sciences
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31
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32
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Hermán V, Takacs H, Duclairoir F, Renault O, Tortai JH, Viala B. Core double–shell cobalt/graphene/polystyrene magnetic nanocomposites synthesized by in situ sonochemical polymerization. RSC Adv 2015. [DOI: 10.1039/c5ra06847a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Core double–shell cobalt/graphene//polystyrene nanocomposites (Co/C//PS) were synthesized byin situsonochemical polymerization technique.
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Affiliation(s)
| | | | | | | | - J. H. Tortai
- Univ. Grenoble Alpes
- INAC-SCIB
- F-38000 Grenoble
- France
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33
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Li X, Liu X, Qiao X, Xing S. Confining the polymerization of aniline to generate yolk–shell polyaniline@SiO2 nanostructures. RSC Adv 2015. [DOI: 10.1039/c5ra15065e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Yolk–shell nanostructured polyaniline@SiO2 particles were fabricated by using CeO2@SiO2 particles as reactive and confined templates and the samples were applied in drug loading and photothermal release as a proof of concept.
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Affiliation(s)
- Xiaoting Li
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P. R. China 130024
| | - Xianchun Liu
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P. R. China 130024
| | - Xiaoguang Qiao
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P. R. China 130024
| | - Shuangxi Xing
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials
- Northeast Normal University
- Changchun
- P. R. China 130024
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34
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Wang Y, He J, Liu C, Chong WH, Chen H. Thermodynamik und Kinetik in der Nanosynthese. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402986] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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35
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Wang Y, He J, Liu C, Chong WH, Chen H. Thermodynamics versus Kinetics in Nanosynthesis. Angew Chem Int Ed Engl 2014; 54:2022-51. [DOI: 10.1002/anie.201402986] [Citation(s) in RCA: 329] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 12/29/2022]
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36
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Hu W, Chen H, Li CM. One-step synthesis of monodisperse gold dendrite@polypyrrole core-shell nanoparticles and their enhanced catalytic durability. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3440-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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37
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Wang H, Song X, Liu C, He J, Chong WH, Chen H. Homo- and co-polymerization of polysytrene-block-poly(acrylic acid)-coated metal nanoparticles. ACS NANO 2014; 8:8063-8073. [PMID: 25000121 DOI: 10.1021/nn502084a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Amphiphilic block copolymers such as polystyrene-block-poly(acrylic acid) (PSPAA) give micelles that are known to undergo sphere-to-cylinder shape transformation. Exploiting this polymer property, core-shell nanoparticles coated in PSPAA can be "polymerized" into long chains following the chain-growth polymerization mode. This method is now extended to include a variety of different nanoparticles. A case study on the assembly process was carried out to understand the influence of the PAA block length, the surface ligand, and the size and morphology of the monomer nanoparticles. Shortening the PAA block promotes the reorganization of the amphiphilic copolymer in the micelles, which is essential for assembling large Au nanoparticles. Small Au nanoparticles can be directly "copolymerized" with empty PSPAA micelles into chains. The reaction time, acid quantity, and the [Au nanoparticles]/[PSPAA micelles] concentration ratio played important roles in controlling the sphere-cylinder-vesicle conversion of the PSPAA micelles, giving rise to different kinds of random "copolymers". With this knowledge, a general method is then developed to synthesize homo, random, and block "copolymers", where the basic units include small Au nanoparticles (d = 16 nm), large Au nanoparticles (d = 32 nm), Au nanorods, Te nanowires, and carbon nanotubes. Given the lack of means for assembling nanoparticles, advancing synthetic capabilities is of crucial importance. Our work provides convenient routes for combining nanoparticles into long-chain structures, facilitating rational design of complex nanostructures in the future.
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Affiliation(s)
- Hong Wang
- Division of Chemistry and Biological Chemistry, Nanyang Technological University , Singapore 637371
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38
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He J, Ji W, Yao L, Wang Y, Khezri B, Webster RD, Chen H. Strategy for nano-catalysis in a fixed-bed system. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4151-4155. [PMID: 24719281 DOI: 10.1002/adma.201306157] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 02/24/2014] [Indexed: 06/03/2023]
Abstract
For industry applications of nano-catalysts, the main bottlenecks are the low loading per unit support area and the slow flow rate through the support particles. By growing a dense Au nanowire forest on a loose network of glass fibers, continuous-flow catalysis can be achieved with a processing rate about 100 times that of the best literature rate.
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Affiliation(s)
- Jiating He
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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39
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Jiang N, Shao L, Wang J. (Gold nanorod core)/(polyaniline shell) plasmonic switches with large plasmon shifts and modulation depths. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:3282-3289. [PMID: 24591117 DOI: 10.1002/adma.201305905] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Revised: 01/19/2014] [Indexed: 06/03/2023]
Abstract
(Gold nanorod core)/(polyaniline shell) nanostructures are prepared for functioning as active plasmonic switches. The single core/shell nanostructures exhibit a remarkable switching performance, with the modulation depth and scattering peak shift reaching 10 dB and 100 nm, respectively. The nanostructures are also deposited on substrates to form macroscale monolayers with remarkable ensemble plasmonic switching performances.
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Affiliation(s)
- Nina Jiang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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40
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Abstract
Templating is one of the most important techniques for the controlled synthesis of nanostructured materials. This powerful tool uses a pre-existing guide with desired nanoscale features to direct the formation of nanomaterials into forms that are otherwise difficult to obtain. As a result, templated synthesis is capable of producing nanostructures with unique structures, morphologies and properties. In this review, we summarize the general principles of templated synthesis and cover recent developments in this area. As a wide variety of synthesis techniques are utilized to produce nanomaterials using template-based methods, the discussion is organized around the various types of common templates. We examine the use of both physical and chemical hard colloidal templates, soft templates, and other non-colloidal templates, followed by our perspective on the state of the field and potential future directions.
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Affiliation(s)
- Yiding Liu
- Department of Chemistry, University of California, Riverside, CA 92521, USA
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41
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Nguyen KT, Li D, Borah P, Ma X, Liu Z, Zhu L, Grüner G, Xiong Q, Zhao Y. Photoinduced charge transfer within polyaniline-encapsulated quantum dots decorated on graphene. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8105-8110. [PMID: 23855339 DOI: 10.1021/am402182z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A new method to enhance the stability of quantum dots (QDs) in aqueous solution by encapsulating them with conducting polymer polyaniline was reported. The polyaniline-encapsulated QDs were then decorated onto graphene through π-π interactions between graphene and conjugated polymer shell of QDs, forming stable polyaniline/QD/graphene hybrid. A testing electronic device was fabricated using the hybrid in order to investigate the photoinduced charge transfer between graphene and encapsulated QDs within the hybrid. The charge transfer mechanism was explored through cyclic voltammetry and spectroscopic studies. The hybrid shows a clear response to the laser irradiation, presenting a great advantage for further applications in optoelectronic devices.
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Affiliation(s)
- Kim Truc Nguyen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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42
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Wang H, Chen L, Feng Y, Chen H. Exploiting core-shell synergy for nanosynthesis and mechanistic investigation. Acc Chem Res 2013; 46:1636-46. [PMID: 23614692 DOI: 10.1021/ar400020j] [Citation(s) in RCA: 168] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The core-shell nanoparticle structure, which consists of an inner layer "guest" nanoparticle encapsulated inside another of a different material, is the simplest motif in two-component systems. In comparison to the conventional single-component systems, complex systems pose both challenges and opportunities. In this Account, we describe our recent progresses in using core-shell motif for exploring new and sophisticated nanostructures. Our discussion is focused on the mechanistic details, in order to facilitate rational design in future studies. We believe that systematic development of synthetic capability, particularly in complex and multifunctional systems, is of great importance for future applications. A key issue in obtaining core-shell nanostructures is minimizing the core-shell interfacial tension. Typically, one can coat the core with a ligand for better interaction with the shell. By selecting suitable ligands, we have developed general encapsulation methods in three systems. A variety of nanoparticles and nanowires were encapsulated using either amphiphilic block copolymer (polystyrene-block-poly(acrylic acid)), conductive polymer (polyaniline, polypyrrole, or polythiophene), or silica as the shell material. Obvious uses of shells are to stabilize colloidal objects, retain their surface ligands, prevent particle aggregation, or preserve the assembled superstructures. These simple capabilities are essential in our synthesis of surface-enhanced Raman scattering nanoprobes, in assigning the solution state of nanostructures before drying, and in developing purification methods for nano-objects. When it is applied in situ during nanocrystal growth or nanoparticle assembly, the intermediates trapped by shell encapsulation can offer great insights into the mechanistic details. On the other hand, having a shell as a second component provides a window for exploring the core-shell synergistic effects. Hybrid core-shell nanocrystals have interesting effects, for example, in causing the untwisting of nanowires to give double helices. In addition, partial polymer shells can bias nanocrystal growth towards one direction or promote the random growth of Au dendritic structures; contracting polymer shells can compress the embedded nanofilaments (Au nanowires or carbon nanotubes), forcing them to coil into rings. Also, by exploiting the sphere-to-cylinder conversion of block copolymer micelles, the Au nanoparticles pre-embedded in the polymer micelles can be assembled into long chains. Lastly, shells are also very useful for mechanistic studies. We have demonstrated such applications in studying the controlled aggregation of nanoparticles, in probing the diffusion kinetics of model drug molecules from nanocarriers to nanoacceptors, and in measuring the ionic diffusion through polyaniline shells.
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Affiliation(s)
- Hong Wang
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
| | - Liyong Chen
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
| | - Yuhua Feng
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
| | - Hongyu Chen
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371
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43
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Guo DL, Tan LH, Wei ZP, Chen H, Wu T. Density-controlled synthesis of uniform ZnO nanowires: wide-range tunability and growth regime transition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2069-2075. [PMID: 23359529 DOI: 10.1002/smll.201201369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Dong Lai Guo
- Division of Physics and Applied Physics, Nanyang Technological University, 637371 Singapore
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44
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Li J, Han J, Xu T, Guo C, Bu X, Zhang H, Wang L, Sun H, Yang B. Coating urchinlike gold nanoparticles with polypyrrole thin shells to produce photothermal agents with high stability and photothermal transduction efficiency. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7102-7110. [PMID: 23692027 DOI: 10.1021/la401366c] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Photothermal therapy using inorganic nanoparticles (NPs) is a promising technique for the selective treatment of tumor cells because of their capability to convert the absorbed radiation into heat energy. Although anisotropic gold (Au) NPs present an excellent photothermal effect, the poor structural stability during storage and/or upon laser irradiation still limits their practical application as efficient photothermal agents. With the aim of improving the stability, in this work we adopted biocompatible polypyrrole (PPy) as the shell material for coating urchinlike Au NPs. The experimental results indicate that a several nanometer PPy shell is enough to maintain the structural stability of NPs. In comparison to the bare NPs, PPy-coated NPs exhibit improved structural stability toward storage, heat, pH, and laser irradiation. In addition, the thin shell of PPy also enhances the photothermal transduction efficiency (η) of PPy-coated Au NPs, resulting from the absorption of PPy in the red and near-infrared (NIR) regions. For example, the PPy-coated Au NPs with an Au core diameter of 120 nm and a PPy shell of 6.0 nm exhibit an η of 24.0% at 808 nm, which is much higher than that of bare Au NPs (η = 11.0%). As a primary attempt at photothermal therapy, the PPy-coated Au NPs with a 6.0 nm PPy shell exhibit an 80% death rate of Hela cells under 808 nm NIR laser irradiation.
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Affiliation(s)
- Jing Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, PR China
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45
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Recent Advancement in Functional Core-Shell Nanoparticles of Polymers: Synthesis, Physical Properties, and Applications in Medical Biotechnology. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/672059] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper covers the core-shell nanomaterials, mainly, polymer-core polymer shell, polymer-core metal shell, and polymer-core nonmetal shells. Herein, various synthesis techniques, properties, and applications of these materials have been discussed. The detailed discussion of the properties with experimental parameters has been carried out. The various characterization techniques for the core-shell nanostructure have also been discussed. Their physical and chemical properties have been addressed. The future aspects of such core-shell nanostructures for biomedical and various other applications have been discussed with a special emphasis on their properties.
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46
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Qian K, Liu H, Yang L, Liu J. Designing and fabricating of surface-enhanced Raman scattering substrate with high density hot spots by polyaniline template-assisted self-assembly. NANOSCALE 2012; 4:6449-6454. [PMID: 22955203 DOI: 10.1039/c2nr31339a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In general, the procedures for producing a high density hot spots structure should be stable, inexpensive, and easy to make. It still remains a grand challenge to assemble silver or gold nanoparticles (Au NPs) with well-defined hot spots for SERS detection. In this study, we present a very simple method for designing and fabricating a surface-enhanced Raman scattering (SERS) substrate with high density hot spots, using large area positively charged polyaniline (PANI) nanofibers as template to assemble negatively charged Au NPs. In order to obtain the optimized SERS-active substrates, different experiments to synthesize diverse Au/PANI with different sizes of Au NPs from about 50, 30 to 15 nm were carried out. The results revealed that the PANI nanofibers were fully coated by the ~15 nm Au NPs, forming a high density Au/PANI SERS substrate. The results evidence that we can obtain stable and sensitive SERS measurements.
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Affiliation(s)
- Kai Qian
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, 230031, China
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47
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Lu L, Wang W, Cai W, Chen ZR. Synthesis and characterization of polypyrrole-au coated SiO2@poly(4-vinylpyridine) composites. J Appl Polym Sci 2012. [DOI: 10.1002/app.38636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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48
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Jagtap NR, Shelke VA, Nimase MS, Jadhav SM, Shankarwar SG, Chondhekar TK. Electrochemical Synthesis of Tetra Alkyl Ammonium Salt Stabilized Gold Nanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/15533174.2012.680124] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- N. R. Jagtap
- a Department of Chemistry , New Arts, Commerce and Science College , Ahmednagar , India
| | - V. A. Shelke
- b Department of Chemistry , Dr. Babasaheb Ambedkar Marathwada University , Aurangabad , India
| | - M. S. Nimase
- a Department of Chemistry , New Arts, Commerce and Science College , Ahmednagar , India
| | - S. M. Jadhav
- c Department of Chemistry , Jawaharlal Nehru Engineering College , Aurangabad , India
| | - S. G. Shankarwar
- b Department of Chemistry , Dr. Babasaheb Ambedkar Marathwada University , Aurangabad , India
| | - T. K. Chondhekar
- b Department of Chemistry , Dr. Babasaheb Ambedkar Marathwada University , Aurangabad , India
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49
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Wang H, Chen L, Shen X, Zhu L, He J, Chen H. Unconventional Chain-Growth Mode in the Assembly of Colloidal Gold Nanoparticles. Angew Chem Int Ed Engl 2012; 51:8021-5. [DOI: 10.1002/anie.201203088] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2012] [Indexed: 02/06/2023]
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50
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Wang H, Chen L, Shen X, Zhu L, He J, Chen H. Unconventional Chain-Growth Mode in the Assembly of Colloidal Gold Nanoparticles. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203088] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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