551
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Huang CJ, Chu SH, Wang LC, Li CH, Lee TR. Bioinspired Zwitterionic Surface Coatings with Robust Photostability and Fouling Resistance. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23776-23786. [PMID: 26452141 DOI: 10.1021/acsami.5b08418] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Great care has been paid to the biointerface between a bulk material and the biological environment, which plays a key role in the optimized performance of medical devices. In this work, we report a new superhydrophilic adsorbate, called L-cysteine betaine (Cys-b), having branched zwitterionic groups that give rise to surfaces and nanoparticles with enhanced chemical stability, biofouling resistance, and inertness to environmental changes. Cys-b was synthesized from the amphoteric sulfur-containing amino acid, L-cysteine (Cys), by quaternization of its amino group. Gold surfaces modified with Cys-b exhibited prominent repellence against the nonspecific adsorption of proteins, bacteria, and fibroblast cells. In addition, Cys-b existed in zwitterionic form over a wide pH range (i.e., pH 3.4 to 10.8), and showed excellent suppression in photoinduced oxidation on gold substrates. Furthermore, the modification of hollow Ag@Au nanoshells with Cys-b gave rise to nanoparticles with excellent colloidal stability and resistance to coordinative interaction with Cu(2+). Taken together, the unique features of Cys-b offer a new nanoscale coating for use in a wide spectrum of applications.
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Affiliation(s)
| | | | | | - Chien-Hung Li
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , Houston, Texas 77204-5003 United States
| | - T Randall Lee
- Department of Chemistry and the Texas Center for Superconductivity, University of Houston , Houston, Texas 77204-5003 United States
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552
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Miller JB, Dandu N, Velizhanin KA, Anthony RJ, Kortshagen UR, Kroll DM, Kilina S, Hobbie EK. Enhanced Luminescent Stability through Particle Interactions in Silicon Nanocrystal Aggregates. ACS NANO 2015; 9:9772-9782. [PMID: 26348831 DOI: 10.1021/acsnano.5b02676] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Close-packed assemblies of ligand-passivated colloidal nanocrystals can exhibit enhanced photoluminescent stability, but the origin of this effect is unclear. Here, we use experiment, simulation, and ab initio computation to examine the influence of interparticle interactions on the photoluminescent stability of silicon nanocrystal aggregates. The time-dependent photoluminescence emitted by structures ranging in size from a single quantum dot to agglomerates of more than a thousand is compared with Monte Carlo simulations of noninteracting ensembles using measured single-particle blinking data as input. In contrast to the behavior typically exhibited by the metal chalcogenides, the measured photoluminescent stability shows an enhancement with respect to the noninteracting scenario with increasing aggregate size. We model this behavior using time-dependent density functional theory calculations of energy transfer between neighboring nanocrystals as a function of nanocrystal size, separation, and the presence of charge and/or surface-passivation defects. Our results suggest that rapid exciton transfer from "bright" nanocrystals to surface trap states in nearest-neighbors can efficiently fill such traps and enhance the stability of emission by promoting the radiative recombination of slowly diffusing excited electrons.
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Affiliation(s)
- Joseph B Miller
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Naveen Dandu
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Kirill A Velizhanin
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Rebecca J Anthony
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Uwe R Kortshagen
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Daniel M Kroll
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Svetlana Kilina
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Erik K Hobbie
- North Dakota State University , Fargo, North Dakota 58108, United States
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553
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Petkov V, Prasai B, Shastri S, Chen TY. 3D Atomic Arrangement at Functional Interfaces Inside Nanoparticles by Resonant High-Energy X-ray Diffraction. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23265-23277. [PMID: 26415142 DOI: 10.1021/acsami.5b07391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
With current science and technology moving rapidly into smaller scales, nanometer-sized materials, often referred to as NPs, are produced in increasing numbers and explored for numerous useful applications. Evidence is mounting, however, that useful properties of NPs can be improved further and even new NP functionality achieved by not only controlling the NP size and shape but also interfacing chemically or structurally distinct entities into single, so-called "composite" NPs. A typical example is core-shell NPs wherein the synergy of distinct atoms at the core\shell interface endows the NPs with otherwise unachievable functionality. However, though advantageous, the concept of functional interfaces inside NPs is still pursued largely by trial-and-error. That is because it is difficut to assess the interfaces precisely at the atomic level using traditional experimental techniques and, hence, difficult to take control of. Using the core\shell interface in less than 10 nm in size Ru core-Pt shells NPs as an example, we demonstrate that precise knowledge of the 3D atomic arrangement at functional interfaces inside NPs can be obtained by resonant high-energy X-ray diffraction (XRD) coupled to element-specific atomic pair distribution function (PDF) analysis. On the basis of the unique structure knowledge obtained, we scrutinize the still-debatable influence of core\shell interface on the catalytic functionality of Ru core-Pt shell NPs, thus evidencing the usefulness of this nontraditional technique for practical applications.
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Affiliation(s)
- Valeri Petkov
- Department of Physics, Central Michigan University , Mt. Pleasant, Michigan 48859, United States
| | - Binay Prasai
- Department of Physics, Central Michigan University , Mt. Pleasant, Michigan 48859, United States
| | - Sarvjit Shastri
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Tsan-Yao Chen
- Department of Engineering and System Science, National Tsing Hua University , Hsinchu 30013, Taiwansinchu
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554
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Sun J, Yang F, Yang X. Synthesis of functionalized fluorescent gold nanoclusters for acid phosphatase sensing. NANOSCALE 2015; 7:16372-16380. [PMID: 26391420 DOI: 10.1039/c5nr04826e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel and convenient one-pot but two-step synthesis of fluorescent gold nanoclusters, incorporating glutathione (GSH) and 11-mercaptoundecanoic acid (MUA) as the functionalized ligands (i.e. AuNCs@GSH/MUA), is demonstrated. Herein, the mixing of HAuCl4 and GSH in aqueous solution results in the immediate formation of non-fluorescent GSH-Au(+) complexes, and then a class of ∼2.6 nm GSH-coated AuNCs (AuNCs@GSH) with mild orange-yellow fluorescence after several days. Interestingly, the intense orange-red emitting ∼1.7 nm AuNCs@GSH/MUA can be synthesized within seconds by introducing an alkaline aqueous solution of MUA into the GSH-Au(+) complexes or AuNC@GSH solution. Subsequently, a reliable AuNC@GSH/MUA-based real-time assay of acid phosphatase (ACP) is established for the first time, inspired by the selective coordination of Fe(3+) with surface ligands of AuNCs, the higher binding affinity between the pyrophosphate ion (PPi) and Fe(3+), and the hydrolysis of PPi into orthophosphate by ACP. Our fluorescent chemosensor can also be applied to assay ACP in a real biological sample and, furthermore, to screen the inhibitor of ACP. This report paves a new avenue for synthesizing AuNCs based on either the bottom-up reduction or top-down etching method, establishing real-time fluorescence assays for ACP by means of PPi as the substrate, and further exploring the sensing applications of fluorescent AuNCs.
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Affiliation(s)
- Jian Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
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555
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Xianyu Y, Chen Y, Jiang X. Horseradish Peroxidase-Mediated, Iodide-Catalyzed Cascade Reaction for Plasmonic Immunoassays. Anal Chem 2015; 87:10688-92. [DOI: 10.1021/acs.analchem.5b03522] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yunlei Xianyu
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiping Chen
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, China
| | - Xingyu Jiang
- Beijing Engineering Research Center for BioNanotechnology & Key Lab for Biological Effects of Nanomaterials and Nanosafety, National Center for NanoScience and Technology, Beijing 100190, China
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556
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Rowland CE, Susumu K, Stewart MH, Oh E, Mäkinen AJ, O'Shaughnessy TJ, Kushto G, Wolak MA, Erickson JS, Efros AL, Huston AL, Delehanty JB. Electric Field Modulation of Semiconductor Quantum Dot Photoluminescence: Insights Into the Design of Robust Voltage-Sensitive Cellular Imaging Probes. NANO LETTERS 2015; 15:6848-54. [PMID: 26414396 DOI: 10.1021/acs.nanolett.5b02725] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The intrinsic properties of quantum dots (QDs) and the growing ability to interface them controllably with living cells has far-reaching potential applications in probing cellular processes such as membrane action potential. We demonstrate that an electric field typical of those found in neuronal membranes results in suppression of the QD photoluminescence (PL) and, for the first time, that QD PL is able to track the action potential profile of a firing neuron with millisecond time resolution. This effect is shown to be connected with electric-field-driven QD ionization and consequent QD PL quenching, in contradiction with conventional wisdom that suppression of the QD PL is attributable to the quantum confined Stark effect.
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Affiliation(s)
- Clare E Rowland
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory , Code 6900, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Kimihiro Susumu
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Michael H Stewart
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Eunkeu Oh
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Antti J Mäkinen
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Thomas J O'Shaughnessy
- Materials Science and Technology Division, Naval Research Laboratory , Code 6300, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Gary Kushto
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Mason A Wolak
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Jeffrey S Erickson
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory , Code 6900, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Alexander L Efros
- Materials Science and Technology Division, Naval Research Laboratory , Code 6300, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - Alan L Huston
- Optical Sciences Division, Naval Research Laboratory , Code 5600, 4555 Overlook Avenue SW, Washington, DC 20375, United States
| | - James B Delehanty
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory , Code 6900, 4555 Overlook Avenue SW, Washington, DC 20375, United States
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557
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Resa S, Orte A, Miguel D, Paredes JM, Puente-Muñoz V, Salto R, Giron MD, Ruedas-Rama MJ, Cuerva JM, Alvarez-Pez JM, Crovetto L. New Dual Fluorescent Probe for Simultaneous Biothiol and Phosphate Bioimaging. Chemistry 2015; 21:14772-9. [DOI: 10.1002/chem.201502799] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Indexed: 12/19/2022]
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558
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Li L, Yuan C, Zhou D, Ribbe AE, Kittilstved KR, Thayumanavan S. Utilizing Reversible Interactions in Polymeric Nanoparticles To Generate Hollow Metal–Organic Nanoparticles. Angew Chem Int Ed Engl 2015; 54:12991-5. [DOI: 10.1002/anie.201505242] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/02/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Longyu Li
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003‐9336 (USA)
| | - Conghui Yuan
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003‐9336 (USA)
- College of Materials, Xiamen University, Xiamen, 361005 (P.R. China)
| | - Dongming Zhou
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003‐9336 (USA)
| | - Alexander E. Ribbe
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003 (USA)
| | - Kevin R. Kittilstved
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003‐9336 (USA)
| | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003‐9336 (USA)
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559
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Ravnik M, Čopar S, Žumer S. Particles with changeable topology in nematic colloids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:354111. [PMID: 26291540 DOI: 10.1088/0953-8984/27/35/354111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We show that nematic colloids can serve as a highly variable and controllable platform for studying inclusions with changeable topology and their effects on the surrounding ordering fields. We explore morphing of toroidal and knotted colloidal particles into effective spheres, distinctively changing their Euler characteristic and affecting the surrounding nematic field, including topological defect structures. With toroidal particles, the inner nematic defect eventually transitions from a wide loop to a point defect (a small loop). Trefoil particles become linked with two knotted defect loops, mutually forming a three component link, that upon tightening transform into a two-component particle-defect loop link. For more detailed topological analysis, Pontryagin-Thom surfaces are calculated and visualised, indicating an interesting cascade of defect rewirings caused by the shape morphing of the knotted particles.
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Affiliation(s)
- Miha Ravnik
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
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560
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Li L, Yuan C, Zhou D, Ribbe AE, Kittilstved KR, Thayumanavan S. Utilizing Reversible Interactions in Polymeric Nanoparticles To Generate Hollow Metal-Organic Nanoparticles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505242] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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561
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Bodelón G, Montes-García V, Fernández-López C, Pastoriza-Santos I, Pérez-Juste J, Liz-Marzán LM. Au@pNIPAM SERRS Tags for Multiplex Immunophenotyping Cellular Receptors and Imaging Tumor Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4149-57. [PMID: 25939486 DOI: 10.1002/smll.201500269] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/18/2015] [Indexed: 05/20/2023]
Abstract
Detection technologies employing optically encoded particles have gained much interest toward clinical diagnostics and drug discovery, but the portfolio of available systems is still limited. The fabrication and characterization of highly stable surface-enhanced resonance Raman scattering (SERRS)-encoded colloids for the identification and imaging of proteins expressed in cells are reported. These plasmonic nanostructures are made of gold octahedra coated with poly(N-isopropylacrylamide) microgels and can be readily encoded with Raman active dyes while retaining high colloidal stability in biofluids. A layer-by-layer polyelectrolyte coating is used to seal the outer surface of the encoded particles and to provide a reactive surface for covalent conjugation with antibodies. The targeted multiplexing capabilities of the SERRS tags are demonstrated by the simultaneous detection and imaging of three tumor-associated surface biomarkers: epidermal growth factor receptor (EGFR), epithelial cell adhesion molecule (EpCAM), and homing cell adhesion molecule (CD44) by SERRS spectroscopy. The plasmonic microgels are able to discriminate tumor A431 (EGFR+/EpCAM+/CD44+) and nontumor 3T3 2.2 (EGFR-/EpCAM-/CD44+) cells while cocultured in vitro.
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Affiliation(s)
- Gustavo Bodelón
- Departmento de Química Física, Universidade de Vigo, 36310, Vigo, Spain
| | | | | | | | - Jorge Pérez-Juste
- Departmento de Química Física, Universidade de Vigo, 36310, Vigo, Spain
| | - Luis M Liz-Marzán
- Departmento de Química Física, Universidade de Vigo, 36310, Vigo, Spain
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009, Donostia-, San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48011, Bilbao, Spain
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562
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Moser M, Behnke T, Hamers-Allin C, Klein-Hartwig K, Falkenhagen J, Resch-Genger U. Quantification of PEG-Maleimide Ligands and Coupling Efficiencies on Nanoparticles with Ellman’s Reagent. Anal Chem 2015; 87:9376-83. [DOI: 10.1021/acs.analchem.5b02173] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marko Moser
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Thomas Behnke
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Carolina Hamers-Allin
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Karin Klein-Hartwig
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Jana Falkenhagen
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
| | - Ute Resch-Genger
- BAM Federal Institute for Materials Research and Testing, Richard-Willstaetter-Strasse 11, D-12489 Berlin, Germany
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563
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Lignos I, Stavrakis S, Kilaj A, deMello AJ. Millisecond-Timescale Monitoring of PbS Nanoparticle Nucleation and Growth Using Droplet-Based Microfluidics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4009-17. [PMID: 25998018 DOI: 10.1002/smll.201500119] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/01/2015] [Indexed: 05/18/2023]
Abstract
The early-time kinetics (<1 s) of lead sulfide (PbS) quantum dot formation are probed using a novel droplet-based microfluidic platform, which allows for high-throughput and real-time optical analysis of the reactive process with millisecond time resolution. The reaction platform enables the concurrent investigation of the emission characteristics of PbS quantum dots and a real-time estimation of their size and concentration during nucleation and growth. These investigations reveal a two-stage mechanism for PbS nanoparticle formation. The first stage corresponds to the fast conversion of precursor species to PbS crystals, followed by the growth of the formed particles. The growth kinetics of the PbS nanoparticles follow the Lifshitz-Slyozov-Wagner model for Ostwald ripening, allowing direct estimation of the rate constants for the process. In addition, the extraction of absorption spectra of ultrasmall quantum dots is demonstrated for first time in an online manner. The droplet-based microfluidic platform integrated with online spectroscopic analysis provides a new tool for the quantitative extraction of high temperature kinetics for systems with rapid nucleation and growth stages.
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Affiliation(s)
- Ioannis Lignos
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied BiosciencesETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
| | - Stavros Stavrakis
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied BiosciencesETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
| | - Ardita Kilaj
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied BiosciencesETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
| | - Andrew J deMello
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied BiosciencesETH Zurich, Vladimir-Prelog-Weg 1, Zurich, 8093, Switzerland
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564
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Cai XJ, Yuan HM, Blencowe A, Qiao GG, Genzer J, Spontak RJ. Film-Stabilizing Attributes of Polymeric Core-Shell Nanoparticles. ACS NANO 2015; 9:7940-7949. [PMID: 26146164 DOI: 10.1021/acsnano.5b00237] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Self-organization of nanoparticles into stable, molecularly thin films provides an insightful paradigm for manipulating the manner in which materials interact at nanoscale dimensions to generate unique material assemblies at macroscopic length scales. While prior studies in this vein have focused largely on examining the performance of inorganic or organic/inorganic hybrid nanoparticles (NPs), the present work examines the stabilizing attributes of fully organic core-shell microgel (CSMG) NPs composed of a cross-linked poly(ethylene glycol dimethacrylate) (PEGDMA) core and a shell of densely grafted, but relatively short-chain, polystyrene (PS) arms. Although PS homopolymer thin films measuring from a few to many nanometers in thickness, depending on the molecular weight, typically dewet rapidly from silica supports at elevated temperatures, spin-coated CSMG NP films measuring as thin as 10 nm remain stable under identical conditions for at least 72 h. Through the use of self-assembled monolayers (SAMs) to alter the surface of a flat silica-based support, we demonstrate that such stabilization is not attributable to hydrogen bonding between the acrylic core and silica. We also document that thin NP films consisting of three or less layers (10 nm) and deposited onto SAMs can be fully dissolved even after extensive thermal treatment, whereas slightly thicker films (40 nm) on Si wafer become only partially soluble during solvent rinsing with and without sonication. Taken together, these observations indicate that the present CSMG NP films are stabilized primarily by multidirectional penetration of relatively short, unentangled NP arms caused by NP layering, rather than by chain entanglement as in linear homopolymer thin films. This nanoscale "velcro"-like mechanism permits such NP films, unlike their homopolymer counterparts of comparable chain length and thickness, to remain intact as stable, free-floating sheets on water, and thus provides a viable alternative to ultrathin organic coating strategies.
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Affiliation(s)
- Xiao-Jing Cai
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Hao-Miao Yuan
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Anton Blencowe
- Department of Chemical & Biomolecular Engineering, University of Melbourne , Parkville, Victoria 3010, Australia
- Mawson Institute, Division of ITEE, The University of South Australia , Mawson Lakes, South Australia 5095, Australia
| | - Greg G Qiao
- Department of Chemical & Biomolecular Engineering, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University , Raleigh, North Carolina 27695-7905, United States
- Department of Materials Science & Engineering, North Carolina State University , Raleigh, North Carolina 27695-7907, United States
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565
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Zhao C, Bai Z, Liu X, Zhang Y, Zou B, Zhong H. Small GSH-Capped CuInS2 Quantum Dots: MPA-Assisted Aqueous Phase Transfer and Bioimaging Applications. ACS APPLIED MATERIALS & INTERFACES 2015. [PMID: 26212187 DOI: 10.1021/acsami.5b05503] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
An efficient ligand exchange strategy for aqueous phase transfer of hydrophobic CuInS2/ZnS quantum dots was developed by employing glutathione (GSH) and mercaptopropionic acid (MPA) as the ligands. The whole process takes less than 20 min and can be scaled up to gram amount. The material characterizations show that the final aqueous soluble samples are solely capped with GSH on the surface. Importantly, these GSH-capped CuInS2/ZnS quantum dots have small size (hydrodynamic diameter <10 nm), moderate fluorescent properties (up to 34%) as well as high stability in aqueous solutions (stable for more than three months in 4 °C without any significant fluorescence quenching). Moreover, this ligand exchange strategy is also versatile for the aqueous phase transfer of other hydrophobic quantum dots, for instance, CuInSe2 and CdSe/ZnS quantum dots. We further demonstrated that GSH-capped quantum dots could be suitable fluorescence markers to penetrate cell membrane and image the cells. In addition, the GSH-capped CuInS2 quantum dots also have potential use in other fields such as photocatalysis and quantum dots sensitized solar cells.
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Affiliation(s)
| | | | - Xiangyou Liu
- ‡Cancer Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, United States
| | | | - Bingsuo Zou
- §Micro Nano Technology Center, Beijing Institute of Technology, 5 Zhongguancun South Street, Beijing 100081, P. R. China
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566
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Ross MB, Ku JC, Blaber MG, Mirkin CA, Schatz GC. Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices. Proc Natl Acad Sci U S A 2015; 112:10292-7. [PMID: 26240356 PMCID: PMC4547218 DOI: 10.1073/pnas.1513058112] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bottom-up assemblies of plasmonic nanoparticles exhibit unique optical effects such as tunable reflection, optical cavity modes, and tunable photonic resonances. Here, we compare detailed simulations with experiment to explore the effect of structural inhomogeneity on the optical response in DNA-gold nanoparticle superlattices. In particular, we explore the effect of background environment, nanoparticle polydispersity (>10%), and variation in nanoparticle placement (∼5%). At volume fractions less than 20% Au, the optical response is insensitive to particle size, defects, and inhomogeneity in the superlattice. At elevated volume fractions (20% and 25%), structures incorporating different sized nanoparticles (10-, 20-, and 40-nm diameter) each exhibit distinct far-field extinction and near-field properties. These optical properties are most pronounced in lattices with larger particles, which at fixed volume fraction have greater plasmonic coupling than those with smaller particles. Moreover, the incorporation of experimentally informed inhomogeneity leads to variation in far-field extinction and inconsistent electric-field intensities throughout the lattice, demonstrating that volume fraction is not sufficient to describe the optical properties of such structures. These data have important implications for understanding the role of particle and lattice inhomogeneity in determining the properties of plasmonic nanoparticle lattices with deliberately designed optical properties.
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Affiliation(s)
- Michael B Ross
- Department of Chemistry, Northwestern University, Evanston, IL 60208; International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208
| | - Jessie C Ku
- International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208; Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
| | - Martin G Blaber
- Department of Chemistry, Northwestern University, Evanston, IL 60208; International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208
| | - Chad A Mirkin
- Department of Chemistry, Northwestern University, Evanston, IL 60208; International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208; Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
| | - George C Schatz
- Department of Chemistry, Northwestern University, Evanston, IL 60208; International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208;
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567
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Ozel T, Ashley MJ, Bourret GR, Ross MB, Schatz GC, Mirkin CA. Solution-Dispersible Metal Nanorings with Deliberately Controllable Compositions and Architectural Parameters for Tunable Plasmonic Response. NANO LETTERS 2015; 15:5273-8. [PMID: 26133945 DOI: 10.1021/acs.nanolett.5b01594] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We report a template-based technique for the preparation of solution-dispersible nanorings composed of Au, Ag, Pt, Ni, and Pd with control over outer diameter (60-400 nm), inner diameter (25-230 nm), and height (40 nm to a few microns). Systematic and independent control of these parameters enables fine-tuning of the three characteristic localized surface plasmon resonance modes of Au nanorings and the resulting solution-based extinction spectra from the visible to the near-infrared. This synthetic approach provides a new pathway for solution-based investigations of surfaces with negative curvature.
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Affiliation(s)
- Tuncay Ozel
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael J Ashley
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Gilles R Bourret
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael B Ross
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - George C Schatz
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Chad A Mirkin
- †Department of Materials Science and Engineering, ‡Department of Chemical and Biological Engineering, and §Department of Chemistry, and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
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568
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Petrakova V, Rehor I, Stursa J, Ledvina M, Nesladek M, Cigler P. Charge-sensitive fluorescent nanosensors created from nanodiamonds. NANOSCALE 2015; 7:12307-11. [PMID: 26138745 DOI: 10.1039/c5nr00712g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We show that fluorescent nanodiamonds (FNDs) are among the few types of nanosensors that enable direct optical reading of noncovalent molecular events. The unique sensing mechanism is based on switching between the negatively charged and neutral states of NV centers which is induced by the interaction of the FND surface with charged molecules.
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Affiliation(s)
- V Petrakova
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic.
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569
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Zhang P, Cheetham AG, Lock LL, Li Y, Cui H. Activatable nanoprobes for biomolecular detection. Curr Opin Biotechnol 2015; 34:171-9. [DOI: 10.1016/j.copbio.2015.01.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 01/26/2015] [Indexed: 12/21/2022]
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570
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Liang CK, Eller MJ, Verkhoturov SV, Schweikert EA. Mass Spectrometry of Nanoparticles is Different. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:1259-1265. [PMID: 25944367 DOI: 10.1007/s13361-015-1151-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 03/25/2015] [Accepted: 03/27/2015] [Indexed: 06/04/2023]
Abstract
Secondary ion mass spectrometry, SIMS, is a method of choice for the characterization of nanoparticles, NPs. For NPs with large surface-to-volume ratios, heterogeneity is a concern. Assays should thus be on individual nano-objects rather than an ensemble of NPs; however, this may be difficult or impossible. This limitation can be side-stepped by probing a large number of dispersed NPs one-by-one and recording the emission from each NP separately. A large collection of NPs will likely contain subsets of like-NPs. The experimental approach is to disperse the NPs and hit an individual NP with a single massive cluster (e.g., C-60, Au-400). At impact energies of ~1 keV/atom, they generate notable secondary ion (SI) emission. Examination of small NPs (≤20 nm in diameter) shows that the SI emission is size-dependent and impacts are not all equivalent. Accurate identification of the type of impact is key for qualitative assays of core or outer shell composition. For quantitative assays, the concept of effective impacts is introduced. Selection of co-emitted ejecta combined with rejection (anticoincidence) of substrate ions allows refining chemical information within the projectile interaction volume. Last, to maximize the SI signal, small NPs (≤5 nm in diameter) can be examined in the transmission mode where the SI yields are enhanced ~10-fold over those in the (conventional) reflection direction. Future endeavors should focus on schemes acquiring SIs, electrons, and photons concurrently.
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Affiliation(s)
- C-K Liang
- Department of Chemistry, Texas A&M University, College Station, Texas, 77843, USA
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571
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Sanromán-Iglesias M, Zhang KAI, Chuvilin A, Lawrie CH, Grzelczak M, Liz-Marzán LM. Conjugated Polymers As Molecular Gates for Light-Controlled Release of Gold Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15692-15695. [PMID: 26177362 DOI: 10.1021/acsami.5b05087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The remote release of nano-objects from a container is a promising approach to transduce chemical events into an optical signal. The major challenge in the development of such a system involves the use of a suitable molecular gate that retains aggregated particles and releases them upon applying an external stimulus. We show proof-of-concept experiments for the release of gold nanoparticles into an aqueous solution upon photodegradation of conjugated polymer thin films. Gold nanoparticles thus transduce light-induced chemical events into an amplified optical signal with a release rate of 2.5 nM per hour, which can be readily detected by the naked eye.
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Affiliation(s)
- Maria Sanromán-Iglesias
- †CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain
- ‡Oncology Area, Biodonostia Research Institute, Donostia-San Sebastián, Spain
| | - Kai A I Zhang
- §Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Andrey Chuvilin
- ⊥CIC nanoGUNE Consolider, Avenida de Tolosa 76, 20018 Donostia-San Sebastián, Spain
- #Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Charles H Lawrie
- ‡Oncology Area, Biodonostia Research Institute, Donostia-San Sebastián, Spain
- #Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Marek Grzelczak
- †CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain
- #Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Luis M Liz-Marzán
- †CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain
- #Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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572
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Gröschel AH, Müller AHE. Self-assembly concepts for multicompartment nanostructures. NANOSCALE 2015; 7:11841-76. [PMID: 26123217 DOI: 10.1039/c5nr02448j] [Citation(s) in RCA: 236] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Compartmentalization is ubiquitous to many biological and artificial systems, be it for the separate storage of incompatible matter or to isolate transport processes. Advancements in the synthesis of sequential block copolymers offer a variety of tools to replicate natural design principles with tailor-made soft matter for the precise spatial separation of functionalities on multiple length scales. Here, we review recent trends in the self-assembly of amphiphilic block copolymers to multicompartment nanostructures (MCNs) under (semi-)dilute conditions, with special emphasis on ABC triblock terpolymers. The intrinsic immiscibility of connected blocks induces short-range repulsion into discrete nano-domains stabilized by a third, soluble block or molecular additive. Polymer blocks can be synthesized from an arsenal of functional monomers directing self-assembly through packing frustration or response to various fields. The mobility in solution further allows the manipulation of self-assembly processes into specific directions by clever choice of environmental conditions. This review focuses on practical concepts that direct self-assembly into predictable nanostructures, while narrowing particle dispersity with respect to size, shape and internal morphology. The growing understanding of underlying self-assembly mechanisms expands the number of experimental concepts providing the means to target and manipulate progressively complex superstructures.
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Affiliation(s)
- André H Gröschel
- Molecular Materials, Department of Applied Physics, Aalto University School of Science, FIN-00076 Aalto, Espoo, Finland.
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573
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Morales-Narváez E, Golmohammadi H, Naghdi T, Yousefi H, Kostiv U, Horák D, Pourreza N, Merkoçi A. Nanopaper as an Optical Sensing Platform. ACS NANO 2015; 9:7296-305. [PMID: 26135050 DOI: 10.1021/acsnano.5b03097] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Bacterial cellulose nanopaper (BC) is a multifunctional material known for numerous desirable properties: sustainability, biocompatibility, biodegradability, optical transparency, thermal properties, flexibility, high mechanical strength, hydrophilicity, high porosity, broad chemical-modification capabilities and high surface area. Herein, we report various nanopaper-based optical sensing platforms and describe how they can be tuned, using nanomaterials, to exhibit plasmonic or photoluminescent properties that can be exploited for sensing applications. We also describe several nanopaper configurations, including cuvettes, plates and spots that we printed or punched on BC. The platforms include a colorimetric-based sensor based on nanopaper containing embedded silver and gold nanoparticles; a photoluminescent-based sensor, comprising CdSe@ZnS quantum dots conjugated to nanopaper; and a potential up-conversion sensing platform constructed from nanopaper functionalized with NaYF4:Yb(3+)@Er(3+)&SiO2 nanoparticles. We have explored modulation of the plasmonic or photoluminescent properties of these platforms using various model biologically relevant analytes. Moreover, we prove that BC is and advantageous preconcentration platform that facilitates the analysis of small volumes of optically active materials (∼4 μL). We are confident that these platforms will pave the way to optical (bio)sensors or theranostic devices that are simple, transparent, flexible, disposable, lightweight, miniaturized and perhaps wearable.
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Affiliation(s)
| | - Hamed Golmohammadi
- ‡Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz 6135743337, Iran
| | - Tina Naghdi
- ‡Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz 6135743337, Iran
| | - Hossein Yousefi
- §Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan 4913815739, Iran
| | - Uliana Kostiv
- ⊥Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského Sq. 2, Prague 6 162 06, Czech Republic
| | - Daniel Horák
- ⊥Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského Sq. 2, Prague 6 162 06, Czech Republic
| | - Nahid Pourreza
- ‡Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz 6135743337, Iran
| | - Arben Merkoçi
- ∥ICREA - Institucio Catalana de Recerca i Estudis Avançats, Barcelona 08010, Spain
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574
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Mitragotri S, Anderson DG, Chen X, Chow EK, Ho D, Kabanov AV, Karp JM, Kataoka K, Mirkin CA, Petrosko SH, Shi J, Stevens MM, Sun S, Teoh S, Venkatraman SS, Xia Y, Wang S, Gu Z, Xu C. Accelerating the Translation of Nanomaterials in Biomedicine. ACS NANO 2015; 9:6644-54. [PMID: 26115196 PMCID: PMC5227554 DOI: 10.1021/acsnano.5b03569] [Citation(s) in RCA: 211] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Due to their size and tailorable physicochemical properties, nanomaterials are an emerging class of structures utilized in biomedical applications. There are now many prominent examples of nanomaterials being used to improve human health, in areas ranging from imaging and diagnostics to therapeutics and regenerative medicine. An overview of these examples reveals several common areas of synergy and future challenges. This Nano Focus discusses the current status and future potential of promising nanomaterials and their translation from the laboratory to the clinic, by highlighting a handful of successful examples.
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Affiliation(s)
- Samir Mitragotri
- Center for Bioengineering, Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Address correspondence to: , ,
| | - Daniel G. Anderson
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Xiaoyuan Chen
- National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Edward K. Chow
- Cancer Science Institute of Singapore, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077
| | - Dean Ho
- Division of Oral Biology and Medicine, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Alexander V. Kabanov
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Jeffrey M. Karp
- Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Kazunori Kataoka
- Departments of Materials Engineering and Bioengineering, University of Tokyo, Tokyo 113-8654, Japan
| | - Chad A. Mirkin
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Sarah Hurst Petrosko
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Jinjun Shi
- Laboratory for Nanoengineering & Drug Delivery, Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering, Institute for Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Sweehin Teoh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798
| | - Subbu S. Venkatraman
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30322, United States
| | - Shutao Wang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhen Gu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
- Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina 27695, United States
- Address correspondence to: , ,
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798
- Address correspondence to: , ,
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575
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Affiliation(s)
- Christian Colliex
- Laboratoire de Physique des Solides (UMR CNRS8502), Université Paris Sud XI, 91405 Orsay, France
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576
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Peng F, Cao Z, Ji X, Chu B, Su Y, He Y. Silicon nanostructures for cancer diagnosis and therapy. Nanomedicine (Lond) 2015; 10:2109-23. [DOI: 10.2217/nnm.15.53] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The emergence of nanotechnology suggests new and exciting opportunities for early diagnosis and therapy of cancer. During the recent years, silicon-based nanomaterials featuring unique properties have received great attention, showing high promise for myriad biological and biomedical applications. In this review, we will particularly summarize latest representative achievements on the development of silicon nanostructures as a powerful platform for cancer early diagnosis and therapy. First, we introduce the silicon nanomaterial-based biosensors for detecting cancer markers (e.g., proteins, tumor-suppressor genes and telomerase activity, among others) with high sensitivity and selectivity under molecular level. Then, we summarize in vitro and in vivo applications of silicon nanostructures as efficient nanoagents for cancer therapy. Finally, we discuss the future perspective of silicon nanostructures for cancer diagnosis and therapy.
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Affiliation(s)
- Fei Peng
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Zhaohui Cao
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Xiaoyuan Ji
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Binbin Chu
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Yuanyuan Su
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Yao He
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
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577
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Zhong Y, Sun X, Wang S, Peng F, Bao F, Su Y, Li Y, Lee ST, He Y. Facile, Large-Quantity Synthesis of Stable, Tunable-Color Silicon Nanoparticles and Their Application for Long-Term Cellular Imaging. ACS NANO 2015; 9:5958-67. [PMID: 26027458 DOI: 10.1021/acsnano.5b00683] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We herein introduce a facile, low-cost photochemical method capable of rapid (<40 min) and large-quantity (∼10 g) production of highly fluorescent (quantum yield: 25%) silicon nanoparticles (SiNPs) of tunable optical properties (peak emission wavelength in the range of 470-560 nm) under ambient air conditions, by introducing 1,8-naphthalimide as a reducing agent and surface ligands. The as-prepared SiNPs feature robust storage stability and photostability preserving strong and stable fluorescent during long-term (>3 h) high-power UV irradiation, in contrast to the rapid fluorescence quenching within 2 h of conventional organic dyes and II-VI quantum dots under the same conditions. The as-prepared SiNPs serving as photostable nanoprobes are workable for cellular imaging in long-term manners. Our findings provide a powerful method for mild-condition and low-cost, large-quantity production of highly fluorescent and photostable SiNPs for various promising applications.
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Affiliation(s)
- Yiling Zhong
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Xiaotian Sun
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Siyi Wang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Fei Peng
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Feng Bao
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Yuanyuan Su
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Youyong Li
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Shuit-Tong Lee
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
| | - Yao He
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China
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578
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Zhang P, Lee S, Yu H, Fang N, Kang SH. Super-resolution of fluorescence-free plasmonic nanoparticles using enhanced dark-field illumination based on wavelength-modulation. Sci Rep 2015; 5:11447. [PMID: 26074302 PMCID: PMC4466792 DOI: 10.1038/srep11447] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/27/2015] [Indexed: 11/09/2022] Open
Abstract
Super-resolution imaging of fluorescence-free plasmonic nanoparticles (NPs) was achieved using enhanced dark-field (EDF) illumination based on wavelength-modulation. Indistinguishable adjacent EDF images of 103-nm gold nanoparticles (GNPs), 40-nm gold nanorods (GNRs), and 80-nm silver nanoparticles (SNPs) were modulated at their wavelengths of specific localized surface plasmon scattering. The coordinates (x, y) of each NP were resolved by fitting their point spread functions with a two-dimensional Gaussian. The measured localization precisions of GNPs, GNRs, and SNPs were 2.5 nm, 5.0 nm, and 2.9 nm, respectively. From the resolved coordinates of NPs and the corresponding localization precisions, super-resolution images were reconstructed. Depending on the spontaneous polarization of GNR scattering, the orientation angle of GNRs in two-dimensions was resolved and provided more elaborate localization information. This novel fluorescence-free super-resolution method was applied to live HeLa cells to resolve NPs and provided remarkable sub-diffraction limit images.
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Affiliation(s)
- Peng Zhang
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, Korea
| | - Seungah Lee
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, Korea
| | - Hyunung Yu
- Center for Nanometrology, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea
| | - Ning Fang
- Ames Laboratory-US Department of Energy and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - Seong Ho Kang
- 1] Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, Korea [2] Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 446-701, Korea
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579
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Xia Y, Xia X, Peng HC. Shape-Controlled Synthesis of Colloidal Metal Nanocrystals: Thermodynamic versus Kinetic Products. J Am Chem Soc 2015; 137:7947-66. [DOI: 10.1021/jacs.5b04641] [Citation(s) in RCA: 631] [Impact Index Per Article: 70.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Younan Xia
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Xiaohu Xia
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | - Hsin-Chieh Peng
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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580
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Song C, Zhong Y, Jiang X, Peng F, Lu Y, Ji X, Su Y, He Y. Peptide-Conjugated Fluorescent Silicon Nanoparticles Enabling Simultaneous Tracking and Specific Destruction of Cancer Cells. Anal Chem 2015; 87:6718-23. [PMID: 26021403 DOI: 10.1021/acs.analchem.5b00853] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We herein introduce a kind of fluorescent silicon nanoparticles (SiNPs) bioprobes, that is, peptides-conjugated SiNPs, which simultaneously feature small sizes (<10 nm), biological functionality, and stable and strong fluorescence (photoluminescent quantum yield (PLQY): ∼28%), as well as favorable biocompatibility. Taking advantage of these merits, we further demonstrate such resultant SiNPs bioprobes are superbly suitable for real-time immunofluorescence imaging of cancer cells. Meanwhile, malignant tumor cells could be specifically destroyed by the peptides-conjugated SiNPs, suggesting potential promise of simultaneous detection and treatment of cancer cells.
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Affiliation(s)
- Chongxi Song
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yiling Zhong
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xiangxu Jiang
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Fei Peng
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yimei Lu
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xiaoyuan Ji
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yuanyuan Su
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yao He
- Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
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581
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Coulter JA, Butterworth KT, Jain S. Prostate cancer radiotherapy: potential applications of metal nanoparticles for imaging and therapy. Br J Radiol 2015; 88:20150256. [PMID: 26051659 DOI: 10.1259/bjr.20150256] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Prostate cancer (CaP) is the most commonly diagnosed cancer in males. There have been dramatic technical advances in radiotherapy delivery, enabling higher doses of radiotherapy to primary cancer, involved lymph nodes and oligometastases with acceptable normal tissue toxicity. Despite this, many patients relapse following primary radical therapy, and novel treatment approaches are required. Metal nanoparticles are agents that promise to improve diagnostic imaging and image-guided radiotherapy and to selectively enhance radiotherapy effectiveness in CaP. We summarize current radiotherapy treatment approaches for CaP and consider pre-clinical and clinical evidence for metal nanoparticles in this condition.
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Affiliation(s)
- J A Coulter
- 1 School of Pharmacy, McClay Research Centre, Queen's University Belfast, Belfast, UK
| | - K T Butterworth
- 2 Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
| | - S Jain
- 2 Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, UK
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582
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Lin Y, Chapman R, Stevens MM. Integrative Self-assembly of Graphene Quantum Dot and Biopolymer into a Versatile Biosensing Toolkit. ADVANCED FUNCTIONAL MATERIALS 2015; 25:3183-3192. [PMID: 28458628 PMCID: PMC5409516 DOI: 10.1002/adfm.201500624] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hybrid self-assembly has become a reliable approach to synthesize soft materials with multiple levels of structural complexity and synergistic functionality. In this work, photoluminescent graphene quantum dots (GQDs, 2-5 nm) are used for the first time as molecule-like building blocks to construct self-assembled hybrid materials for label-free biosensors. Ionic self-assembly of disc-shaped GQDs and charged biopolymers is found to generate a series of hierarchical structures that exhibit aggregation-induced fluorescence quenching of the GQDs and change the protein/polypeptide secondary structure. The integration of GQDs and biopolymers via self-assembly offers a flexible toolkit for the design of label-free biosensors in which the GQDs serve as a fluorescent probe and the biopolymers provide biological function. The versatility of this approach is demonstrated in the detection of glycosaminoglycans (GAGs), pH, and proteases using three strategies: 1) competitive binding of GAGs to biopolymers, 2) pH-responsive structural changes of polypeptides, and 3) enzymatic hydrolysis of the protein backbone, respectively. It is anticipated that the integrative self-assembly of biomolecules and GQDs will open up new avenues for the design of multifunctional biomaterials with combined optoelectronic properties and biological applications.
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Affiliation(s)
- Yiyang Lin
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Robert Chapman
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
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583
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Herrmann IK. How nanotechnology-enabled concepts could contribute to the prevention, diagnosis and therapy of bacterial infections. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2015; 19:239. [PMID: 26025027 PMCID: PMC4448307 DOI: 10.1186/s13054-015-0957-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This viewpoint summarizes a selection of nanotechnology-based key concepts relevant to critical care medicine. It focuses on novel approaches for a trigger-dependent release of antimicrobial substances from degradable nano-sized carriers, the ultra-sensitive detection of analytes in body fluid samples by plasmonic and fluorescent nanoparticles, and the rapid removal of pathogens from whole blood using magnetic nanoparticles. The concepts presented here could significantly contribute to the prevention, diagnosis and therapy of bacterial infections in future and it is now our turn to bring them from the bench to the bedside.
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Affiliation(s)
- Inge K Herrmann
- Department Materials Meet Life, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, 9014, St Gallen, Switzerland.
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584
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Reisch A, Runser A, Arntz Y, Mély Y, Klymchenko AS. Charge-controlled nanoprecipitation as a modular approach to ultrasmall polymer nanocarriers: making bright and stable nanoparticles. ACS NANO 2015; 9:5104-5116. [PMID: 25894117 DOI: 10.1021/acsnano.5b00214] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ultrasmall polymer nanoparticles are rapidly gaining importance as nanocarriers for drugs and contrast agents. Here, a straightforward modular approach to efficiently loaded and stable sub-20-nm polymer particles is developed. In order to obtain ultrasmall polymer nanoparticles, we investigated the influence of one to two charged groups per polymer chain on the size of particles obtained by nanoprecipitation. Negatively charged carboxylate and sulfonate or positively charged trimethylammonium groups were introduced into the polymers poly(d,l-lactide-co-glycolide) (PLGA), polycaprolactone (PCL), and poly(methyl methacrylate) (PMMA). According to dynamic light scattering, atomic force and electron microscopy, the presence of one to two charged groups per polymer chain can strongly reduce the size of polymer nanoparticles made by nanoprecipitation. The particle size can be further decreased to less than 15 nm by decreasing the concentration of polymer in the solvent used for nanoprecipitation. We then show that even very small nanocarriers of 15 nm size preserve the capacity to encapsulate large amounts of ionic dyes with bulky counterions at efficiencies >90%, which generates polymer nanoparticles 10-fold brighter than quantum dots of the same size. Postmodification of their surface with the PEG containing amphiphiles Tween 80 and pluronic F-127 led to particles that were stable under physiological conditions and in the presence of 10% fetal bovine serum. This modular route could become a general method for the preparation of ultrasmall polymer nanoparticles as nanocarriers of contrast agents and drugs.
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Affiliation(s)
- Andreas Reisch
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74 Route du Rhin, 67401 Illkirch, France
| | - Anne Runser
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74 Route du Rhin, 67401 Illkirch, France
| | - Youri Arntz
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74 Route du Rhin, 67401 Illkirch, France
| | - Yves Mély
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74 Route du Rhin, 67401 Illkirch, France
| | - Andrey S Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, 74 Route du Rhin, 67401 Illkirch, France
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585
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Kilina S, Kilin D, Tretiak S. Light-Driven and Phonon-Assisted Dynamics in Organic and Semiconductor Nanostructures. Chem Rev 2015; 115:5929-78. [DOI: 10.1021/acs.chemrev.5b00012] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Svetlana Kilina
- Chemistry
and Biochemistry Department, North Dakota State University, Fargo, North Dakota 5810, United States
| | - Dmitri Kilin
- Department
of Chemistry, University of South Dakota, Vermillion, South Dakota 57069, United States
| | - Sergei Tretiak
- Theoretical
Division, Center for Nonlinear Studies (CNLS) and Center for Integrated
Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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586
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Tangeysh B, Moore Tibbetts K, Odhner JH, Wayland BB, Levis RJ. Triangular gold nanoplate growth by oriented attachment of Au seeds generated by strong field laser reduction. NANO LETTERS 2015; 15:3377-3382. [PMID: 25844894 DOI: 10.1021/acs.nanolett.5b00709] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The synthesis of surfactant-free Au nanoplates is desirable for the development of biocompatible therapeutics/diagnostics. Rapid Δ-function energy deposition by irradiation of aqueous KAuCl4 solution with a 5 s burst of intense shaped laser pulses, followed by slow addition of H2O2, results in selective formation of nanoplates with no additional reagents. The primary mechanism of nanoplate formation is found to be oriented attachment of the spherical seeds, which self-recrystallize to form crystalline Au nanoplates.
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Affiliation(s)
- Behzad Tangeysh
- †Department of Chemistry and ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Katharine Moore Tibbetts
- †Department of Chemistry and ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Johanan H Odhner
- †Department of Chemistry and ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Bradford B Wayland
- †Department of Chemistry and ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Robert J Levis
- †Department of Chemistry and ‡Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122, United States
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587
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Shao A, Xie Y, Zhu S, Guo Z, Zhu S, Guo J, Shi P, James TD, Tian H, Zhu WH. Far-Red and Near-IR AIE-Active Fluorescent Organic Nanoprobes with Enhanced Tumor-Targeting Efficacy: Shape-Specific Effects. Angew Chem Int Ed Engl 2015; 54:7275-80. [DOI: 10.1002/anie.201501478] [Citation(s) in RCA: 328] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 03/29/2015] [Indexed: 12/13/2022]
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588
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Shao A, Xie Y, Zhu S, Guo Z, Zhu S, Guo J, Shi P, James TD, Tian H, Zhu WH. Far-Red and Near-IR AIE-Active Fluorescent Organic Nanoprobes with Enhanced Tumor-Targeting Efficacy: Shape-Specific Effects. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501478] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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589
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590
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591
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Ross MB, Ku JC, Vaccarezza VM, Schatz GC, Mirkin CA. Nanoscale form dictates mesoscale function in plasmonic DNA-nanoparticle superlattices. NATURE NANOTECHNOLOGY 2015; 10:453-8. [PMID: 25867942 DOI: 10.1038/nnano.2015.68] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 03/12/2015] [Indexed: 05/04/2023]
Abstract
The nanoscale manipulation of matter allows properties to be created in a material that would be difficult or even impossible to achieve in the bulk state. Progress towards such functional nanoscale architectures requires the development of methods to precisely locate nanoscale objects in three dimensions and for the formation of rigorous structure-function relationships across multiple size regimes (beginning from the nanoscale). Here, we use DNA as a programmable ligand to show that two- and three-dimensional mesoscale superlattice crystals with precisely engineered optical properties can be assembled from the bottom up. The superlattices can transition from exhibiting the properties of the constituent plasmonic nanoparticles to adopting the photonic properties defined by the mesoscale crystal (here a rhombic dodecahedron) by controlling the spacing between the gold nanoparticle building blocks. Furthermore, we develop a generally applicable theoretical framework that illustrates how crystal habit can be a design consideration for controlling far-field extinction and light confinement in plasmonic metamaterial superlattices.
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Affiliation(s)
- Michael B Ross
- 1] Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA [2] International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Jessie C Ku
- 1] International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA [2] Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, USA
| | - Victoria M Vaccarezza
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, USA
| | - George C Schatz
- 1] Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA [2] International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Chad A Mirkin
- 1] Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA [2] International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA [3] Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, USA
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592
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Li X, Serdijn WA, Zheng W, Tian Y, Zhang B. The injectable neurostimulator: an emerging therapeutic device. Trends Biotechnol 2015; 33:388-94. [PMID: 25921343 DOI: 10.1016/j.tibtech.2015.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 12/14/2022]
Abstract
Injectable neurostimulators are currently applied in clinical trials to minimize the side effects such as discomfort, risk of infection, and post-surgery trauma, which can be pronounced with conventional, bulky implantable neurostimulators. Owing to its smaller size, wireless-updatable software, and wireless power supply, the injectable neurostimulator is presumably less invasive, 'smarter', and has a longer lifetime. We discuss the concept and development of the injectable neurostimulator, persistent implementation challenges, and obstacles to be overcome in its evolution. We survey the use of new materials, technologies, and design methods for injectable electrodes, batteries, antennas, and packaging to enhance reliability and other features. These advances in the field are accompanied by progress in electrophysiology, neuroscience, neurology, clinical trials, and treatments.
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Affiliation(s)
- Xiaolong Li
- School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Wouter A Serdijn
- Section of Bioelectronics, Delft University of Technology, Delft, the Netherlands
| | - Wei Zheng
- School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Yubo Tian
- School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Bing Zhang
- School of Electronics and Information, Jiangsu University of Science and Technology, Zhenjiang, China
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593
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Tang Y, Zhang W, Liu J, Zhang L, Huang W, Huo F, Tian D. A plasmonic nanosensor for lipase activity based on enzyme-controlled gold nanoparticles growth in situ. NANOSCALE 2015; 7:6039-6044. [PMID: 25766647 DOI: 10.1039/c4nr07579j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A plasmonic nanosensor for lipase activity was developed based on one-pot nanoparticle growth. Tween 80 was selected not only as the substrate for lipase recognition but also as the reducing and stabilizing agent for the sensor fabrication. The different molecular groups in Tween 80 could have different roles in the fabrication procedure; the H2O2 produced by the autoxidation of the ethylene oxide subunits in Tween 80 could reduce the AuCl4(-) ions to Au atoms, meanwhile, the lipase could hydrolyze its carboxyl ester bond, which could, in turn, control the rate of nucleation of the gold nanoparticles (AuNPs) and tailor the localized surface plasmon resonance (LSPR) of the AuNP transducers. The color changes, which depend on the absence or presence of the lipase, could be used to sense the lipase activity. A linear response ranging from 0.025 to 4 mg mL(-1) and a detection limit of the lipase as low as 3.47 μg mL(-1) were achieved. This strategy circumvents the problems encountered by general enzyme assays that require sophisticated instruments and complicated assembling steps. The methodology can benefit the assays of heterogeneous-catalyzed enzymes.
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Affiliation(s)
- Yan Tang
- College of Science, Nanjing Tech University, Nanjing 211816, China.
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594
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Jo H, Her J, Ban C. Dual aptamer-functionalized silica nanoparticles for the highly sensitive detection of breast cancer. Biosens Bioelectron 2015; 71:129-136. [PMID: 25897882 DOI: 10.1016/j.bios.2015.04.030] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/26/2015] [Accepted: 04/12/2015] [Indexed: 02/07/2023]
Abstract
In this study, we synthesized dual aptamer-modified silica nanoparticles that simultaneously target two types of breast cancer cells: the mucin 1 (MUC1)(+) and human epidermal growth factor receptor 2 (HER2)(+) cell lines. Dual aptamer system enables a broad diagnosis for breast cancer in comparison with the single aptamer system. The dye-doped silica nanoparticles offer great stability with respect to photobleaching and enable the accurate quantification of breast cancer cells. The morphological and spectroscopic characteristics of the designed Dual-SiNPs were demonstrated via diverse methods such as DLS, zeta potential measurements, UV-vis spectroscopy, and fluorescence spectroscopy. Negatively charged Dual-SiNPs with a homogeneous size distribution showed robust and strong fluorescence. In addition, Dual-SiNPs did not affect cell viability, implying that this probe might be readily available for use in an in vivo system. Through ratio optimization of the MUC1 and HER2 aptamers, the binding capacities of the Dual-SiNPs to both cell lines were maximized. Based on Dual-SiNPs, a highly sensitive quantification of breast cancer cells was performed, resulting in a detection limit of 1 cell/100 μL, which is significantly lower compared with those reported in other studies. Moreover, the developed detection platform displayed high selectivity for only the MUC1(+) and HER2(+) cell lines. It is expected that this valuable diagnostic probe will be a noteworthy platform for the diagnosis and prognosis of breast cancer.
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Affiliation(s)
- Hunho Jo
- Department of Chemistry, Pohang University of Science and Technology, 77, Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 790-784, South Korea.
| | - Jin Her
- Department of Chemistry, Pohang University of Science and Technology, 77, Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 790-784, South Korea.
| | - Changill Ban
- Department of Chemistry, Pohang University of Science and Technology, 77, Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 790-784, South Korea.
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595
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Blas-Ferrando VM, Ortiz J, Fernández-Lázaro F, Sastre-Santos Á. Synthesis and characterization of a sulfur-containing phthalocyanine-gold nanoparticle hybrid. J PORPHYR PHTHALOCYA 2015. [DOI: 10.1142/s108842461550011x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This work reports on the synthesis and characterization of a new gold nanoparticle-zinc phthalocyanine system, AuNP - S (t Bu )3 ZnPc , prepared by a ligand exchange reaction of tetraoctylammonium bromide with a novel unsymmetrically substituted zinc phthalocyanine which contains one thioester group in the peripheral position [ AcS (t Bu )3 ZnPc ]. The AuNP - S (t Bu )3 ZnPc hybrid was characterized using UV-vis and 1 H NMR spectroscopies. Transmission electron microscopy allowed the estimation of the size, which was calculated to be ~5 nm. AuNPs - S (t Bu )3 ZnPc conjugate showed much lower fluorescence quantum yield values than the AcS (t Bu )3 ZnPc demonstrating either an energy or electron transfer from the ZnPc to the AuNP . The AuNP - S (t Bu )3 ZnPc hybrid has been anchored to a TiO 2 semiconducting layer using lipoic acid. A solid configuration of TiO 2-lipoic acid- AuNP - S (t Bu )3 ZnPc has been prepared by anchoring lipoic acid to the TiO 2 ( TiO 2-LA) and introducing later the TiO 2-LA with free thiol groups in a toluene solution of AuNP - S (t Bu )3 ZnPc . We have also observed by UV-vis and fluorescence measurements the importance of the ZnPc in avoiding AuNP aggregation on the TiO 2 surface.
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Affiliation(s)
- Vicente M. Blas-Ferrando
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain
| | - Javier Ortiz
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain
| | - Fernando Fernández-Lázaro
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain
| | - Ángela Sastre-Santos
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain
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596
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Wang H, Zhou Y, Jiang X, Sun B, Zhu Y, Wang H, Su Y, He Y. Simultaneous Capture, Detection, and Inactivation of Bacteria as Enabled by a Surface-Enhanced Raman Scattering Multifunctional Chip. Angew Chem Int Ed Engl 2015; 54:5132-6. [DOI: 10.1002/anie.201412294] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/28/2015] [Indexed: 12/22/2022]
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597
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Wang H, Zhou Y, Jiang X, Sun B, Zhu Y, Wang H, Su Y, He Y. Simultaneous Capture, Detection, and Inactivation of Bacteria as Enabled by a Surface-Enhanced Raman Scattering Multifunctional Chip. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412294] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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598
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Sasidharan A, Monteiro-Riviere NA. Biomedical applications of gold nanomaterials: opportunities and challenges. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2015; 7:779-96. [PMID: 25808787 DOI: 10.1002/wnan.1341] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/17/2015] [Indexed: 01/26/2023]
Abstract
In the past few years, there has been an unprecedented development of gold nanomaterials (AuNMs) for potential clinical applications. Owing to their advantageous physical, chemical, and biological properties, AuNMs have attracted great attention in the nanomedicine arena for applications in biological sensing, biomedical imaging, drug delivery, and photothermal therapy. Their tunable size, shape, and surface characteristics coupled with excellent biocompatibility render them ideal candidates for translation from bench-top to bedside. This review summarizes the recent research on the applications of AuNM with a focus on biomedical diagnostics and therapeutics. The bio-interaction of these NM with cells and their in vivo responses are presented. After reviewing these potential applications, future challenges and prospects are discussed and the suitability of how AuNMs are used as effective tools in clinical medicine is assessed.
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Affiliation(s)
- Abhilash Sasidharan
- Nanotechnology Innovation Center of Kansas State (NICKS), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Nancy A Monteiro-Riviere
- Nanotechnology Innovation Center of Kansas State (NICKS), Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
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599
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Carolan D, Doyle H. Germanium nanocrystals as luminescent probes for rapid, sensitive and label-free detection of Fe3+ ions. NANOSCALE 2015; 7:5488-5494. [PMID: 25732780 DOI: 10.1039/c4nr07470j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Luminescent water-soluble germanium nanocrystals (Ge NCs) have been developed as a fluorescent sensing platform for the highly selective and sensitive detection of Fe3+ via quenching of their strong blue luminescence, without the need for analyte-specific labelling groups. The amine-terminated Ge NCs were separated into two discrete size fractions with average diameters of 3.9±0.4 nm and 6.8±1.8 nm using centrifugation. The smaller 3.9 nm NCs possessed a strong blue luminescence, with an average lifetime of 6.1 ns and a quantum yield (QY) of 21.5%, which is strongly influenced by solution pH. In contrast, 6.8 nm NCs exhibited a green luminescence with a longer lifetime of 7.8 ns and lower QY (6.2%) that is insensitive to pH. Sensitive detection of Fe3+ was successfully demonstrated, with a linear relationship between luminescence quenching and Fe3+ concentration observed from 0-800 μM, with a limit of detection of 0.83 μM. The Ge NCs show excellent selectivity toward Fe3+ ions, with no quenching of the fluorescence signal induced by the presence of Fe2+ ions, allowing for solution phase discrimination between ions of the same element with different formal charges. The luminescence quenching mechanism was confirmed by static and time-resolved photoluminescence spectroscopies, while the applicability for this assay for detection of Fe3+ in real water samples was successfully demonstrated.
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Affiliation(s)
- Darragh Carolan
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland.
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600
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Li Z, Yu Y, Li Z, Wu T. A review of biosensing techniques for detection of trace carcinogen contamination in food products. Anal Bioanal Chem 2015; 407:2711-26. [PMID: 25694149 DOI: 10.1007/s00216-015-8530-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/24/2015] [Accepted: 01/30/2015] [Indexed: 01/04/2023]
Abstract
Carcinogen contaminations in the food chain, for example heavy metal ions, pesticides, acrylamide, and mycotoxins, have caused serious health problems. A major objective of food-safety research is the identification and prevention of exposure to these carcinogens, because of their impossible-to-reverse tumorigenic effects. However, carcinogen detection is difficult because of their trace-level presence in food. Thus, reliable and accurate separation and determination methods are essential to protect food safety and human health. This paper summarizes the state of the art in separation and determination methods for analyzing carcinogen contamination, especially the advances in biosensing methods. Furthermore, the application of promising technology including nanomaterials, imprinted polymers, and microdevices is detailed. Challenges and perspectives are also discussed.
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Affiliation(s)
- Zhanming Li
- Department of Biosystems Engineering, Zhejiang University, Hangzhou, 310058, China
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