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Wu H, Wu C, Guo C, Hu J, Guo D, He S. Highly Wavelength-Selective Self-Powered Solar-Blind Ultraviolet Photodetector Based on Colloidal Aluminum Nitride Quantum Dots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2312127. [PMID: 38698570 DOI: 10.1002/smll.202312127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/20/2024] [Indexed: 05/05/2024]
Abstract
Colloidal quantum dots are semiconductor nanocrystals endowed with unique optoelectronic properties. A major challenge to the field is the lack of methods for synthesizing quantum dots exhibit strong photo-response in the deep-ultraviolet (DUV) band. Here, a facile solution-processed method is presented for synthesizing ultrawide bandgap aluminium nitride quantum dots (AlN QDs) showing distinguished UV-B photoluminescence. Combined with the strong optical response in solar blind band, a solution-processed, self-powered AlN-QDs/β-Ga2O3 solar-blind photodetector is demonstrated. The photodetector is characterized with a high responsivity of 1.6 mA W-1 under 0 V bias and specific detectivity 7.60 × 10-11 Jones under 5 V bias voltage with good solar blind selectivity. Given the solution-processed capability of the devices and extraordinary properties of AlN QDs, this study anticipates the utilization of AlN QDs will open up unique opportunities for cost-effective industrial production of high-performance DUV optoelectronics for large-scale applications.
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Affiliation(s)
- Hao Wu
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
- School of Information and Electrical Engineering, Hangzhou City University, Hangzhou, 310015, P. R. China
| | - Chao Wu
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
| | - Chenyu Guo
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Jun Hu
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
| | - Daoyou Guo
- Department of Physics, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
| | - Sailing He
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China
- Ningbo Research Institute, Ningbo, 315100, P. R. China
- Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology, Stockholm, S-100 44, Sweden
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Guo X, Sun X, Zhang J, Huang Y, Liu X, Liu X, Xu W, Chen D. Luminescent Mechanism and Anti-Counterfeiting Application of Hydrophilic, Undoped Room-Temperature Phosphorescent Silicon Nanocrystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2303464. [PMID: 37670207 DOI: 10.1002/smll.202303464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/23/2023] [Indexed: 09/07/2023]
Abstract
Silicon nanocrystals (SiNCs) have attracted extensive attention in many advanced applications due to silicon's high natural abundance, low toxicity, and impressive optical properties. However, these applications are mainly focused on fluorescent SiNCs, little attention is paid to SiNCs with room-temperature phosphorescence (RTP) and their relative applications, especially water-dispersed ones. Herein, this work presents water-dispersible RTP SiNCs (UA-SiNCs) and their optical applications. The UA-SiNCs with a uniform particle size of 2.8 nm are prepared by thermal hydrosilylation between hydrogen-terminated SiNCs (H-SiNCs) and 10-undecenoic acid (UA). Interestingly, the resultant UA-SiNCs can exhibit tunable long-lived RTP with an average lifetime of 0.85 s. The RTP feature of the UA-SiNCs is confirmed to the n-π* transitions of their surface C═O groups. Subsequently, new dual-modal emissive UA-SiNCs-based ink is fabricated by blending with sodium alginate (SA) as the binder. The customized anticounterfeiting labels are also prepared on cellulosic substrates by screen-printing technique. As expected, UA-SiNCs/SA ink exhibits excellent practicability in anticounterfeiting applications. These findings will trigger the rapid development of RTP SiNCs, envisioning enormous potential in future advanced applications such as high-level anti-counterfeiting, information encryption, and so forth.
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Affiliation(s)
- Xin Guo
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
| | - Xuening Sun
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
| | - Jinfeng Zhang
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
| | - Yuanfen Huang
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Xiaohong Liu
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Xin Liu
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Weilin Xu
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
| | - Dongzhi Chen
- State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan, 430073, P. R. China
- School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
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3
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Liu F, Lin J, Luo Y, Xie D, Bian J, Liu X, Yue J. Sialic acid-targeting multi-functionalized silicon quantum dots for synergistic photodynamic and photothermal cancer therapy. Biomater Sci 2023; 11:4009-4021. [PMID: 37129163 DOI: 10.1039/d3bm00339f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
To explore the potential of silicon quantum dots (SiQDs) in combined photodynamic therapy (PDT) and photothermal therapy (PTT), we engineered the surface of SiQDs with the photosensitizer Ce6 and the tumor-cell-targeting ligand phenylboronic acid (PBA) via polydopamine-mediated chemistry. Upon irradiation with light of specific wavelengths, SiQDs@Ce6/PBA could generate high levels of reactive oxygen species (ROS) and trigger effective photo-to-thermal conversion. PBA-conjugation could not only increase the cellular uptake and transcellular transport capability of nanoparticles, but also enhance their tumor accumulation. In the presence of a 635 nm laser, SiQDs@Ce6/PBA was able to trigger intracellular ROS production, which further altered the mitochondrial membrane potential and promoted apoptosis of tumor cells. Finally, combined PDT/PTT treatments led to synergistically enhanced cancer cell killing and tumor-growth inhibition effects. This study demonstrates the surface engineering of silicon quantum dots for synergistic PDT/PTT cancer therapy.
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Affiliation(s)
- Fei Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Jiayi Lin
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Yao Luo
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Donglin Xie
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Jiang Bian
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Xiaobo Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
| | - Jun Yue
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, P. R. China.
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Peng Y, Shao F, Guo K, Zhuo H, Wang Y, Xie X, Tao Y. SiQDs/Cu-β-CD nanoclusters: A fluorescence probe for the mutual non-interference detection of uric acid and l-cysteine under alkaline conditions. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Luo M, Yukawa H, Baba Y. Micro-/nano-fluidic devices and in vivo fluorescence imaging based on quantum dots for cytologic diagnosis. LAB ON A CHIP 2022; 22:2223-2236. [PMID: 35583091 DOI: 10.1039/d2lc00113f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Semiconductor quantum dots (QDs) possess attractive merits over traditional organic dyes, such as tunable emission, narrow emission spectra and good resistance against optical bleaching, and play a vital role in biosensing and bioimaging for cytologic diagnoses. Microfluidic technology is a potentially useful strategy, as it provides a rapid platform for tracing of disease markers. In vivo fluorescence imaging (FI) based on QDs has become popular for the analysis of complex biological processes. We herein report the applications of multifunctional fluorescent QDs as sensitive probes for diagnoses on cancer medicine and stem cell therapy via microfluidic chips and in vivo imaging.
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Affiliation(s)
- Minchuan Luo
- Nanobio Analytical Chemistry, Biomolecular Chemistry, Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
| | - Hiroshi Yukawa
- Nanobio Analytical Chemistry, Biomolecular Chemistry, Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, Anagawa, Inage-ku, Chiba, 263-8555, Japan
- Nagoya University Institute for Advanced Research, Advanced Analytical and Diagnostic Imaging Center (AADIC)/Medical Engineering Unit (MEU), B3 Unit, Tsurumai 65, Showa-ku, Nagoya 466-8550, Japan
- Development of Quantum-nano Cancer Photoimmunotherapy for Clinical Application of Refractory Cancer, Nagoya University, Tsurumai 65, Showa-ku, Nagoya 466-8550, Japan
| | - Yoshinobu Baba
- Nanobio Analytical Chemistry, Biomolecular Chemistry, Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, Anagawa, Inage-ku, Chiba, 263-8555, Japan
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6
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Chen R, Cheng X, Zhang C, Wu H, Zhu H, He S. Sub-3 nm Aluminum Nanocrystals Exhibiting Cluster-Like Optical Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2002524. [PMID: 32812331 DOI: 10.1002/smll.202002524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Metal nanoclusters with distinct photophysical and photochemical properties have drawn intense research interests for their applications in optoelectronics, catalysis, and biomedicine. Herein, strong evidence is provided that light metal is capable of generating comparable optical responses of noble metal nanoclusters, but at much shorter wavelength. Air-stable, size-uniform, sub-3 nm aluminum nanocrystals are prepared with simple solution based synthetic procedures, with photoluminescence located in the ultraviolet range and short exciton lifetime. Partial modulation of the photoluminescence is achieved, indicating the key role of surface oxides. This work is envisioned to inspire new frontiers of nanocluster research with light metals.
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Affiliation(s)
- Runze Chen
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Xiaoyu Cheng
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
- Ningbo Research Institute, Zhejiang University, Ningbo, 315100, China
| | - Chi Zhang
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Hao Wu
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Haiming Zhu
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Sailing He
- National Engineering Research Center for Optical Instruments, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
- Ningbo Research Institute, Zhejiang University, Ningbo, 315100, China
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7
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Singh G, Ddungu JLZ, Licciardello N, Bergmann R, De Cola L, Stephan H. Ultrasmall silicon nanoparticles as a promising platform for multimodal imaging. Faraday Discuss 2021; 222:362-383. [PMID: 32108214 DOI: 10.1039/c9fd00091g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bimodal systems for nuclear and optical imaging are currently being intensively investigated due to their comparable detection sensitivity and the complementary information they provide. In this perspective, we have implemented both modalities on biocompatible ultrasmall silicon nanoparticles (Si NPs). Such nanoparticles are particularly interesting since they are highly biocompatible, have covalent surface functionalization and demonstrate very fast body clearance. We prepared monodisperse citrate-stabilized Si NPs (2.4 ± 0.5 nm) with more than 40 accessible terminal amino groups per particle and, for the first time, simultaneously, a near-infrared dye (IR800-CW) and a radiolabel (64Cu-NOTA = 1,4,7-triazacyclononane-1,4,7-triacetic acid) have been covalently linked to the surface of such Si NPs. The obtained nanomaterials have been fully characterized using HR-TEM, XPS, UV-Vis and FT-IR spectroscopy. These dual-labelled particles do not exhibit any cytotoxicity in vitro. In vivo studies employing both positron emission tomography (PET) and optical imaging (OI) techniques revealed rapid renal clearance of dual-labelled Si NPs from mice.
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Affiliation(s)
- Garima Singh
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, D-01328, Germany.
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8
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Chen J, Yu Y, Zhu B, Han J, Liu C, Liu C, Miao L, Fakudze S. Synthesis of biocompatible and highly fluorescent N-doped silicon quantum dots from wheat straw and ionic liquids for heavy metal detection and cell imaging. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 765:142754. [PMID: 33109369 DOI: 10.1016/j.scitotenv.2020.142754] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 05/28/2023]
Abstract
Silane-based precursors for the synthesis of water-dispersible silicon quantum dots (SiQDs) present harmful effects on both researchers and the environment, due to their high toxicity. Though waste wheat straw is an abundant source of natural silicon, its application towards the synthesis of biocompatible SiQDs for metal detection has not yet been explored. In this study, N-doped SiQDs demonstrating uniform spherical morphologies, excellent water dispersity and strong fluorescence emission with a quantum yield of 28.9% were facilely synthesized by using wheat straw (WS) as silicon source and allyl-3-methylimidazolium chloride (AMIMCl) as nitrogen source. The wheat straw based SiQDs (WS-SiQDs) showed linear fluorescence quenching ((F0-F)/F) with Cr(VI) and Fe(III) concentration in the range of 0-6 × 10-4 M. Following immobilization on hydrophilic silica hydrogels, WS-SiQDs@silica hydrogels demonstrated enhanced fluorescence emission which can selectively detect Cr(VI) and Fe (III) to the limits of 142 and 175 nM, respectively. Moreover, cell imaging results reflected that WS-SiQDs can penetrate the membranes of dental pulp stem cells and react with the nucleuses of the stem cells. The stem cells maintained high viability under the conditions of 24 h incubation and SiQD concentration below 50 mg·L-1, thus indicating low cytotoxicity of WS-SiQDs. The as-prepared SiQDs demonstrated notable structural and fluorescent properties, therefore representing promising biocompatible fluorescent nanomaterials for metal detection and cell imaging.
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Affiliation(s)
- Jianqiang Chen
- College of Biology and the Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China.
| | - Yang Yu
- College of Biology and the Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Bijun Zhu
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, PR China
| | - Jiangang Han
- College of Biology and the Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Chao Liu
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, PR China
| | - Chengguo Liu
- Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing 210042, PR China
| | - Leiying Miao
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, PR China.
| | - Sandile Fakudze
- College of Biology and the Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
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9
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Ghildiyal P, Ke X, Biswas P, Nava G, Schwan J, Xu F, Kline DJ, Wang H, Mangolini L, Zachariah MR. Silicon Nanoparticles for the Reactivity and Energetic Density Enhancement of Energetic-Biocidal Mesoparticle Composites. ACS APPLIED MATERIALS & INTERFACES 2021; 13:458-467. [PMID: 33373186 DOI: 10.1021/acsami.0c17159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Biocidal nanothermite composites show great potential in combating biological warfare threats because of their high-energy-release rates and rapid biocidal agent release. Despite their high reactivity and combustion performance, these composites suffer from low-energy density because of the voids formed due to inefficient packing of fuel and oxidizer particles. In this study, we explore the potential of plasma-synthesized ultrafine Si nanoparticles (nSi, ∼5 nm) as an energetic filler fuel to increase the energy density of Al/Ca(IO3)2 energetic-biocidal composites by filling in the voids in the microstructure. Microscopic and elemental analyses show the partial filling of mesoparticle voids by nSi, resulting in an estimated energy density enhancement of ∼21%. In addition, constant-volume combustion cell results show that nSi addition leads to a ∼2-3-fold increase in reactivity and combustion performance, as compared to Al/Ca(IO3)2 mesoparticles. Oxidation timescale analyses suggest that nSi addition can promote initiation due to faster oxygen transport through the oxide shell of Si nanoparticles. At nSi loadings higher than ∼8%, however, slower burning characteristics of nSi and sintering effects lead to an overall degradation of combustion behavior of the composites.
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Affiliation(s)
- Pankaj Ghildiyal
- University of California, Riverside, California 92521, United States
- University of Maryland, College Park, Maryland 20742, United States
| | - Xiang Ke
- University of California, Riverside, California 92521, United States
| | - Prithwish Biswas
- University of California, Riverside, California 92521, United States
| | - Giorgio Nava
- University of California, Riverside, California 92521, United States
| | - Joseph Schwan
- University of California, Riverside, California 92521, United States
| | - Feiyu Xu
- University of California, Riverside, California 92521, United States
- University of Maryland, College Park, Maryland 20742, United States
| | - Dylan J Kline
- University of California, Riverside, California 92521, United States
- University of Maryland, College Park, Maryland 20742, United States
| | - Haiyang Wang
- University of California, Riverside, California 92521, United States
| | - Lorenzo Mangolini
- University of California, Riverside, California 92521, United States
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Chattopadhyay S, Biteen JS. Super-Resolution Characterization of Heterogeneous Light-Matter Interactions between Single Dye Molecules and Plasmonic Nanoparticles. Anal Chem 2021; 93:430-444. [PMID: 33100005 DOI: 10.1021/acs.analchem.0c04280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Saaj Chattopadhyay
- Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Julie S Biteen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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11
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Marcelo GA, Lodeiro C, Capelo JL, Lorenzo J, Oliveira E. Magnetic, fluorescent and hybrid nanoparticles: From synthesis to application in biosystems. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 106:110104. [DOI: 10.1016/j.msec.2019.110104] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/17/2019] [Accepted: 08/19/2019] [Indexed: 12/19/2022]
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12
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Burdette MK, Jenkins R, Bandera YP, Jones H, Foulger IK, Dickey A, Nieminen AL, Foulger SH. Click-Engineered, Bioresponsive, and Versatile Particle-Protein-Dye System. ACS APPLIED BIO MATERIALS 2019; 2:3183-3193. [PMID: 31844845 PMCID: PMC6913539 DOI: 10.1021/acsabm.9b00025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We present a multifunctional polymer based nanoparticle platform for personalized nanotheranostic applications, which include photodynamic therapy and active targeting. In this system, poly(propargyl acrylate) (PA) particles were surface-modified with organic ligands and fluorophores (the payload) through an environmentally-sensitive linker. An azide modified bovine serum albumin (azBSA) was employed as the linker. This system prevents opsonization and, upon digestion, releases the payload. Attachment of the emitting payload to the particle through azide-modified bovine serum albumin (BSA) quenches emission, which can be again activated with digestion of the azBSA. The emission "turn-on" at a specific location will increase the signal-to-noise ratio. By utilizing human head and neck squamous carcinoma cells (UMSCC22A), photodynamic therapy studies with these particles gave promising reductions in cell growth. Additionally, the particle-protein-dye system is versatile as different fluorophores (such as silicon phthalocyanine or cyanine 3) can be attached to the protein and the same activation/deactivation behavior is observed. Active targeting can be employed to enhance the concentration of the payload in the designated tumor. Human lung carcinoma cells (A549) were utilized in toxicity studies where PA-azBSA particles were modified with a Survivin targeting ligand and indicated an enhanced cell death with the modified particles relative to the "free" Survivin targeting ligand.
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Affiliation(s)
- Mary K. Burdette
- Department of Materials Science and Engineering, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
| | - Ragini Jenkins
- Department of Materials Science and Engineering, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
| | - Yuriy P. Bandera
- Department of Materials Science and Engineering, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
| | - Haley Jones
- Department of Materials Science and Engineering, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
| | - Isabell K. Foulger
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Ashley Dickey
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Department of Chemistry, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
| | - Anna-Liisa Nieminen
- Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - Stephen H. Foulger
- Department of Materials Science and Engineering, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Center for Optical Materials Science and Engineering Technologies, Advanced Materials Research Laboratories, Clemson University, Anderson, South Carolina 29625, United States
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
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13
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Cheng X, Anthony TP, West CA, Hu Z, Sundaresan V, McLeod AJ, Masiello DJ, Willets KA. Plasmon Heating Promotes Ligand Reorganization on Single Gold Nanorods. J Phys Chem Lett 2019; 10:1394-1401. [PMID: 30840464 DOI: 10.1021/acs.jpclett.9b00079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Single-molecule fluorescence microscopy is used to follow dynamic ligand reorganization on the surface of single plasmonic gold nanorods. Fluorescently labeled DNA is attached to gold nanorods via a gold-thiol bond using a low-pH loading method. No fluorescence activity is initially observed from the fluorescent labels on the nanorod surface, which we attribute to a collapsed geometry of DNA on the metal. Upon several minutes of laser illumination, a marked increase in fluorescence activity is observed, suggesting that the ligand shell reorganizes from a collapsed, quenched geometry to an upright, ordered geometry. The ligand reorganization is facilitated by plasmon-mediated photothermal heating, as verified by controls using an external heat source and simulated by coupled optical and heat diffusion modeling. Using super-resolution image reconstruction, we observe spatial variations in which ligand reorganization occurs at the single-particle level. The results suggest the possibility of nonuniform plasmonic heating, which would be hidden with traditional ensemble-averaged measurements.
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Affiliation(s)
- Xiaoyu Cheng
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
| | - Taryn P Anthony
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
| | - Claire A West
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Zhongwei Hu
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Vignesh Sundaresan
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
| | - Aaron J McLeod
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
| | - David J Masiello
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - Katherine A Willets
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
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14
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Mirnajafizadeh F, Ramsey D, McAlpine S, Wang F, Stride JA. Nanoparticles for Bioapplications: Study of the Cytotoxicity of Water Dispersible CdSe(S) and CdSe(S)/ZnO Quantum Dots. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E465. [PMID: 30897752 PMCID: PMC6474084 DOI: 10.3390/nano9030465] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/27/2019] [Accepted: 03/12/2019] [Indexed: 12/14/2022]
Abstract
Semiconductor nanocrystals or quantum dots (QDs) have unique optical and physical properties that make them potential imaging tools in biological and medical applications. However, concerns over the aqueous dispersivity, toxicity to cells, and stability in biological environments may limit the use of QDs in such applications. Here, we report an investigation into the cytotoxicity of aqueously dispersed CdSe(S) and CdSe(S)/ZnO core/shell QDs in the presence of human colorectal carcinoma cells (HCT-116) and a human skin fibroblast cell line (WS1). The cytotoxicity of the precursor solutions used in the synthesis of the CdSe(S) QDs was also determined in the presence of HCT-116 cells. CdSe(S) QDs were found to have a low toxicity at concentrations up to 100 µg/mL, with a decreased cell viability at higher concentrations, indicating a highly dose-dependent response. Meanwhile, CdSe(S)/ZnO core/shell QDs exhibited lower toxicity than uncoated QDs at higher concentrations. Confocal microscopy images of HCT-116 cells after incubation with CdSe(S) and CdSe(S)/ZnO QDs showed that the cells were stable in aqueous concentrations of 100 µg of QDs per mL, with no sign of cell necrosis, confirming the cytotoxicity data.
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Affiliation(s)
| | - Deborah Ramsey
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Shelli McAlpine
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Fan Wang
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Sydney, NSW 2007, Australia.
| | - John Arron Stride
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
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15
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Pujari S, Driss H, Bannani F, van Lagen B, Zuilhof H. One-Pot Gram-Scale Synthesis of Hydrogen-Terminated Silicon Nanoparticles. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2018; 30:6503-6512. [PMID: 30270987 PMCID: PMC6160286 DOI: 10.1021/acs.chemmater.8b03113] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/07/2018] [Indexed: 05/24/2023]
Abstract
Silicon nanoparticles (Si NPs) are highly attractive materials for typical quantum dots functions, such as in light-emitting and bioimaging applications, owing to silicon's intrinsic merits of minimal toxicity, low cost, high abundance, and easy and highly stable functionalization. Especially nonoxidized Si NPs with a covalently bound coating serve well in these respects, given the minimization of surface defects upon hydrosilylation of H-terminated Si NPs. However, to date, methods to obtain such H-terminated Si NPs are still not easy. Herein, we report a new synthetic method to produce size-tunable robust, highly crystalline H-terminated Si NPs (4-9 nm) using microwave irradiation within 5 min at temperatures between 25 and 200 °C and their further covalent functionalization. The key step to obtain highly fluorescent (quantum yield of 7-16%) green-red Si NPs in one simple step is the reduction of triethoxysilane and (+)-sodium l-ascorbate, yielding routinely ∼1 g of H-Si NPs via a highly scalable route in 5-15 min. Subsequent functionalization via hydrosilylation yielded Si NPs with an emission quantum yield of 12-14%. This approach can be used to easily produce high-quality H-Si NPs in gram-scale quantities, which brings the application of functionalized Si NPs significantly closer.
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Affiliation(s)
- Sidharam
P. Pujari
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Hafedh Driss
- Department of Chemical and Materials Engineering and Department of Chemistry,
Faculty
of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fatma Bannani
- Department of Chemical and Materials Engineering and Department of Chemistry,
Faculty
of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Barend van Lagen
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory
of Organic Chemistry, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Department of Chemical and Materials Engineering and Department of Chemistry,
Faculty
of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- School
of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin, P.
R. China
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16
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McVey BFP, König D, Cheng X, O'Mara PB, Seal P, Tan X, Tahini HA, Smith SC, Gooding JJ, Tilley RD. Synthesis, optical properties and theoretical modelling of discrete emitting states in doped silicon nanocrystals for bioimaging. NANOSCALE 2018; 10:15600-15607. [PMID: 30090899 DOI: 10.1039/c8nr05071f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The creation of multiple emission pathways in quantum dots (QDs) is an exciting prospect with fundamental interest and optoelectronic potential. For the first time, we report multiple emission pathways in semiconductor nanocrystals (NCs) where the number of emission pathways desired is controlled by the number of dopant atoms per quantum dot. The origin of additional emission pathways is explained by interactions between dopant states and NC energy levels. Density functional theory (DFT) calculations of undoped 2.3 nm silicon (Si NCs) and the same NCs doped with 2 interstitial Cu atoms show good agreement to experiment. Such calculations provide valuable data to explain the changes in optical transitions due to the Cu dopant in terms of transition energies, quantum yield and dopant position as a function of dopants per NC. Changes in the optical properties of Si NCs induced by dopant concentration include extended excitation range and enhanced absorption coefficients, emission redshifts of up to 60 nm, and a two-fold increase in quantum yields up to 22%. The optical properties of doped NCs lead to significant bioimaging improvements illustrated by in vitro cell imaging, including redshifted excitation wavelengths away from natural autofluorescence and enhanced fluorescent signals.
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Affiliation(s)
- B F P McVey
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia.
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17
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Licciardello N, Hunoldt S, Bergmann R, Singh G, Mamat C, Faramus A, Ddungu JLZ, Silvestrini S, Maggini M, De Cola L, Stephan H. Biodistribution studies of ultrasmall silicon nanoparticles and carbon dots in experimental rats and tumor mice. NANOSCALE 2018; 10:9880-9891. [PMID: 29658023 DOI: 10.1039/c8nr01063c] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ultrasmall clearable nanoparticles possess enormous potential as cancer imaging agents. In particular, biocompatible silicon nanoparticles (Si NPs) and carbon quantum dots (CQDs) hold great potential in this regard. Their facile surface functionalization easily allows the introduction of different labels for in vivo imaging. However, to date, a thorough biodistribution study by in vivo positron emission tomography (PET) and a comparative study of Si vs. C particles of similar size are missing. In this contribution, ultrasmall (size <5 nm) Si NPs and CQDs were synthesized and characterized by high-resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared (FTIR), absorption and steady-state emission spectroscopy. Subsequent functionalization of NPs with a near-infrared dye (Kodak-XS-670) or a radiolabel (64Cu) enabled a detailed in vitro and in vivo study of the particles. For radiolabeling experiments, the bifunctional chelating agent S-2-(4-isothiocyanatobenzyl)-1,4,7-triazacyclononane-1,4,7-triacetic acid (p-SCN-Bn-NOTA) was conjugated to the amino surface groups of the respective NPs. Efficient radiolabeling of NOTA-functionalized NPs with the positron emitter 64Cu was found. The biodistribution and PET studies showed a rapid renal clearance from the in vivo systems for both variants of the nanoparticles. Interestingly, the different derivatives investigated exhibited significant differences in the biodistribution and pharmacokinetic properties. This can mostly be attributed to different surface charge and hydrophilicity of the NPs, arising from the synthetic strategy used to prepare the particles.
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Affiliation(s)
- Nadia Licciardello
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, D-01328 Dresden, Germany.
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18
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Keshavarz M, Tan B, Venkatakrishnan K. Multiplex Photoluminescent Silicon Nanoprobe for Diagnostic Bioimaging and Intracellular Analysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700548. [PMID: 29593957 PMCID: PMC5867044 DOI: 10.1002/advs.201700548] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/10/2017] [Indexed: 05/29/2023]
Abstract
Herein, a label-free multiplex photoluminescent silicon nanoprobe (PLSN-probe) is introduced as a potential substitute for quantum dots (QDs) in bioimaging. An inherently non-photoluminescent silicon substrate is altered to create the PLSN-probe, to overcome the major drawbacks of presently available QDs. Additionally, crystallinity alterations of the multiplane crystalline PLSN-probes lead to broad absorption and multiplex fluorescence emissions, which are attributed to the simultaneous existence of multiple crystal planes. The PLSN-probe not only demonstrates unique optical properties that can be exploited for bioimaging but also exhibits cell-selective uptake that allows the differentiation and diagnosis of HeLa and fibroblast cells. Moreover, multiplex emissions of the PLSN-probe illuminate different organelles such as the nucleus, nucleolemma, and cytoskeleton, depending on size-based preferential uptake by the cell organs. This in vitro study reveals that cancerous HeLa cells have a higher propensity for taking up the PLSN-probe compared to fibroblast cells, allowing the diagnosis of cancerous HeLa cells. Additionally, the fluorescence intensity per unit area of the cell is found to be a reliable means for distinguishing between dead and healthy cells. It is anticipated that the multifunctionality of the PLSN-probes will lead to better insight into the use of such probes for bioimaging and diagnosis applications.
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Affiliation(s)
- Meysam Keshavarz
- Nanocharacterization LaboratoryDepartment of Aerospace EngineeringRyerson University350 Victoria StreetTorontoONM5B 2K3Canada
- Institute for Biomedical EngineeringScience and Technology (iBEST)Partnership between Ryerson University and St. Michael's HospitalTorontoONM5B 1W8Canada
- Ultrashort Laser Nanomanufacturing Research FacilityDepartment of Mechanical and Industrial EngineeringRyerson University350 Victoria StreetTorontoONM5B 2K3Canada
- NanoBioInterface FacilityDepartment of Mechanical and Industrial EngineeringRyerson University350 Victoria StreetTorontoONM5B 2K3Canada
| | - Bo Tan
- Nanocharacterization LaboratoryDepartment of Aerospace EngineeringRyerson University350 Victoria StreetTorontoONM5B 2K3Canada
| | - Krishnan Venkatakrishnan
- Ultrashort Laser Nanomanufacturing Research FacilityDepartment of Mechanical and Industrial EngineeringRyerson University350 Victoria StreetTorontoONM5B 2K3Canada
- Keenan Research Centre for Biomedical ScienceSt. Michael's HospitalTorontoONM5B 1W8Canada
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19
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Tuning the Optical Properties of Silicon Quantum Dots via Surface Functionalization with Conjugated Aromatic Fluorophores. Sci Rep 2018; 8:3050. [PMID: 29445234 PMCID: PMC5813013 DOI: 10.1038/s41598-018-21181-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 01/31/2018] [Indexed: 11/20/2022] Open
Abstract
Silicon Quantum Dots (SQDs) have recently attracted great interest due to their excellent optical properties, low cytotoxicity, and ease of surface modification. The size of SQDs and type of ligand on their surface has a great influence on their optical properties which is still poorly understood. Here we report the synthesis and spectroscopic studies of three families of unreported SQDs functionalized by covalently linking to the aromatic fluorophores, 9-vinylphenanthrene, 1-vinylpyrene, and 3-vinylperylene. The results showed that the prepared functionalized SQDs had a highly-controlled diameter by HR-TEM, ranging from 1.7–2.1 nm. The photophysical measurements of the assemblies provided clear evidence for efficient energy transfer from the fluorophore to the SQD core. Fӧrster energy transfer is the likely mechanism in these assemblies. As a result of the photogenerated energy transfer process, the emission color of the SQD core could be efficiently tuned and its emission quantum efficiency enhanced. To demonstrate the potential application of the synthesized SQDs for bioimaging of cancer cells, the water-soluble perylene- and pyrene-capped SQDs were examined for fluorescent imaging of HeLa cells. The SQDs were shown to be of low cytotoxicity
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20
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Javadi M, Picard D, Sinelnikov R, Narreto MA, Hegmann FA, Veinot JGC. Synthesis and Surface Functionalization of Hydride-Terminated Ge Nanocrystals Obtained from the Thermal Treatment of Ge(OH) 2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8757-8765. [PMID: 28395510 DOI: 10.1021/acs.langmuir.7b00358] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The synthesis of germanium nanocrystals (GeNCs) with well-defined surface chemistry is of considerable interest because of their potential applications in the optoelectronic, battery, and semiconductor industries. Modifying and tailoring GeNC surface chemistry provides an avenue by which reactivity, environmental compatibility (e.g., solubility, resistance to oxidation), and electronic properties may be tailored. Hydride-terminated GeNCs (H-GeNCs) are of particular interest because the reactivity of surface Ge-H bonds toward alkenes and alkynes via hydrogermylation affords the potential for convenient modification; however, these reactions and their scope have not been widely explored. This report describes a straightforward route for preparing a GeNC/GeO2 composite via disproportionation of heretofore-unexplored Ge(II) oxide-based precursor from which the H-GeNCs were freed by subsequently chemical etching. The H-GeNCs were derivatized using a series of hydrogermylation approaches (i.e., thermally activated, radical-initiated, and borane-catalyzed). The presented findings indicate surface functionalization occurs under all conditions investigated; however the nature of surface species (i.e., monolayers vs multilayers) and surface coverage varies depending upon the conditions employed.
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Affiliation(s)
- Morteza Javadi
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta Canada
| | - Darren Picard
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta Canada
| | - Regina Sinelnikov
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta Canada
| | - Mary Alvean Narreto
- Department of Physics, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
| | - Frank A Hegmann
- Department of Physics, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
| | - Jonathan G C Veinot
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta Canada
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21
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McVey BFP, O'Mara PB, McGrath AJ, Faramus A, Yasarapudi VB, Gonçales VR, Tan VTG, Schmidt TW, Gooding JJ, Tilley RD. Role of Surface Capping Molecule Polarity on the Optical Properties of Solution Synthesized Germanium Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8790-8798. [PMID: 28551999 DOI: 10.1021/acs.langmuir.7b01028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The role surface capping molecules play in dictating the optical properties of semiconductor nanocrystals (NCs) is becoming increasingly evident. In this paper the role of surface capping molecule polarity on the optical properties of germanium NCs (Ge NCs) is explored. Capping molecules are split into two groups: nonpolar and polar. The NCs are fully characterized structurally and optically to establish the link between observed optical properties and surface capping molecules. Ge NC optical properties altered by surface capping molecule polarity include emission maximum, emission lifetime, quantum yield, and Stokes shift. For Ge NCs, this work also allows rational tuning of their optical properties through changes to surface capping molecule polarity, leading to improvements in emerging Ge based bioimaging and optoelectronic devices.
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Affiliation(s)
| | | | | | - A Faramus
- Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada
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22
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Cheng X, McVey BFP, Robinson AB, Longatte G, O'Mara PB, Tan VTG, Thordarson P, Tilley RD, Gaus K, Justin Gooding J. Protease sensing using nontoxic silicon quantum dots. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-7. [PMID: 28836415 DOI: 10.1117/1.jbo.22.8.087002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
Herein is presented a proof-of-concept study of protease sensing that combines nontoxic silicon quantum dots (SiQDs) with Förster resonance energy transfer (FRET). The SiQDs serve as the donor and an organic dye as the acceptor. The dye is covalently attached to the SiQDs using a peptide linker. Enzymatic cleavage of the peptide leads to changes in FRET efficiency. The combination of interfacial design and optical imaging presented in this work opens opportunities for use of nontoxic SiQDs relevant to intracellular sensing and imaging.
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Affiliation(s)
- Xiaoyu Cheng
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
- University of New South Wales, EMBL Australia Node in Single Molecule Science, School of Medical Sci, Australia
| | - Benjamin F P McVey
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Andrew B Robinson
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Guillaume Longatte
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Peter B O'Mara
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Vincent T G Tan
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Pall Thordarson
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Richard D Tilley
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
| | - Katharina Gaus
- University of New South Wales, EMBL Australia Node in Single Molecule Science, School of Medical Sci, Australia
| | - John Justin Gooding
- University of New South Wales, School of Chemistry, Australian Centre for NanoMedicine, ARC Centre o, Australia
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23
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Kehrle J, Kaiser S, Purkait TK, Winnacker M, Helbich T, Vagin S, Veinot JGC, Rieger B. In situ IR-spectroscopy as a tool for monitoring the radical hydrosilylation process on silicon nanocrystal surfaces. NANOSCALE 2017; 9:8489-8495. [PMID: 28604898 DOI: 10.1039/c7nr02265d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Among a variety of SiNC functionalization methods, radical initiated grafting is very promising due to its straightforward nature and low propensity to form surface oligomers. In the present study, we employed in situ IR spectroscopy in combination with visible light transmittance measurements to investigate the radical induced grafting process on the well-defined SiNCs. Our findings support the proposed model: unfunctionalized hydride-terminated SiNCs form agglomerates in organic solvents, which break up during the grafting process. However, clearing of the dispersion is not a valid indicator for complete surface functionalization. Furthermore, radical-initiated grafting reactions in which azobisisobutyronitrile (AIBN) is the initiator are strongly influenced by external factors including initiator concentration, grafting temperature, as well as substrate steric demand. The monomer concentration was proven to have a low impact on the grafting process. Based on these new insights an underlying mechanism could be discussed, offering an unprecedented view on the functionalization of SiNC surfaces via radical initiated hydrosilylation.
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Affiliation(s)
- Julian Kehrle
- Catalysis Research Center/WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, Germany.
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24
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Jo S, Ryu B, Chae A, Choi Y, Kang EB, Nur’aeni, Park B, Park SY, In I. Microwave-assisted Synthesis of Highly Fluorescent and Biocompatible Silicon Nanoparticles Using Glucose as Dual Roles of Reducing Agents and Hydrophilic Ligands. CHEM LETT 2017. [DOI: 10.1246/cl.161045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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25
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Shang Y, Ning Z. Colloidal quantum-dots surface and device structure engineering for high-performance light-emitting diodes. Natl Sci Rev 2017. [DOI: 10.1093/nsr/nww097] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
The application of colloidal quantum dots for light-emitting devices has attracted considerable attention in recent years, due to their unique optical properties such as size-dependent emission wavelength, sharp emission peak and high luminescent quantum yield. Tremendous efforts have been made to explore quantum dots for light-emission applications such as light-emitting diodes (LEDs) and light converters. The performance of quantum-dots-based light-emitting diodes (QD-LEDs) has been increasing rapidly in recent decades as the development of quantum-dots synthesis, surface-ligand engineering and device-architecture optimization. Recently, the external quantum efficiencies of red quantum-dots LEDs have exceeded 20.5% with good stability and narrow emission peak. In this review, we summarize the recent advances in QD-LEDs, focusing on quantum-dot surface engineering and device-architecture optimization.
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Affiliation(s)
- Yuequn Shang
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhijun Ning
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China
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26
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Kim D, Zuidema JM, Kang J, Pan Y, Wu L, Warther D, Arkles B, Sailor MJ. Facile Surface Modification of Hydroxylated Silicon Nanostructures Using Heterocyclic Silanes. J Am Chem Soc 2016; 138:15106-15109. [DOI: 10.1021/jacs.6b08614] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Dokyoung Kim
- Department
of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Jonathan M. Zuidema
- Department
of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Jinyoung Kang
- Department
of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Youlin Pan
- Gelest Inc., 11 East Steel Road, Morrisville, Pennsylvania 19067, United States
| | - Lianbin Wu
- Department
of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
- Key
Laboratory of Organosilicon Chemistry and Material Technology, Hangzhou Normal University, Hangzhou 311121, China
| | - David Warther
- Department
of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Barry Arkles
- Gelest Inc., 11 East Steel Road, Morrisville, Pennsylvania 19067, United States
| | - Michael J. Sailor
- Department
of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
- Department
of Nanoengineering, University of California, San Diego, La Jolla, California 92093, United States
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27
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Ye HL, Cai SJ, Li S, He XW, Li WY, Li YH, Zhang YK. One-Pot Microwave Synthesis of Water-Dispersible, High Fluorescence Silicon Nanoparticles and Their Imaging Applications in Vitro and in Vivo. Anal Chem 2016; 88:11631-11638. [PMID: 27797177 DOI: 10.1021/acs.analchem.6b03209] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silicon nanoparticles (SiNPs) have been reported to be synthesized by microwave-assisted methods under high pressure. However, there is still a lack of knowledge about the synthesis of SiNPs via microwave-assisted methods under normal pressure. Here we developed a new, facile, one-pot microwave-assisted method for the synthesis SiNPs (∼4.2 nm) with excellent water solubility under normal pressure by employing glycerol as the solvent. Furthermore, glycerol might be responsible for the photoluminescence quantum yield (PLQY) value up to 47% for the resultant SiNPs. The use of organic solvent could afford less nanoparticle surface defects compared with those prepared in aqueous solution, thus improving the fluorescent efficiency. The as-prepared SiNPs simultaneously featured bright blue-green fluorescence, long lifetime (∼12.8 ns), obvious up-conversion luminescence originating from two-photon absorption, superbly strong photostability, and favorable low toxicity. As a satisfactory probe, the as-synthesized SiNPs were successfully applied in fluorescence imaging of human cervical carcinoma cell lines (HeLa) and zebrafish.
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Affiliation(s)
- Hong-Li Ye
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University , Tianjin 300071, China
| | - Shi-Jiao Cai
- Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Nankai University School of Medicine , Tianjin 300071, China
| | - Si Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University , Tianjin 300071, China
| | - Xi-Wen He
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University , Tianjin 300071, China
| | - Wen-You Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University , Tianjin 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Yu-Hao Li
- Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Nankai University School of Medicine , Tianjin 300071, China
| | - Yu-Kui Zhang
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University , Tianjin 300071, China.,National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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28
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Xu G, Zeng S, Zhang B, Swihart MT, Yong KT, Prasad PN. New Generation Cadmium-Free Quantum Dots for Biophotonics and Nanomedicine. Chem Rev 2016; 116:12234-12327. [DOI: 10.1021/acs.chemrev.6b00290] [Citation(s) in RCA: 395] [Impact Index Per Article: 49.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Gaixia Xu
- Key
Laboratory of Optoelectronics Devices and Systems of Ministry of Education/Guangdong
Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China
- CINTRA
CNRS/NTU/THALES,
UMI 3288, Research Techno Plaza, 50
Nanyang Drive, Border X Block, Singapore 637553, Singapore
| | - Shuwen Zeng
- School
of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
- CINTRA
CNRS/NTU/THALES,
UMI 3288, Research Techno Plaza, 50
Nanyang Drive, Border X Block, Singapore 637553, Singapore
| | - Butian Zhang
- School
of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | | | - Ken-Tye Yong
- School
of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
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29
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McVey BFP, Prabakar S, Gooding JJ, Tilley RD. Solution Synthesis, Surface Passivation, Optical Properties, Biomedical Applications, and Cytotoxicity of Silicon and Germanium Nanocrystals. Chempluschem 2016; 82:60-73. [DOI: 10.1002/cplu.201600207] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin F. P. McVey
- School of Chemistry and Electron Microscopy Unit; of the Mark Wainwright Analytical Centre; University of New South Wales; Sydney NSW 2052 Australia
| | - Sujay Prabakar
- Leather&Shoe Research Association of New Zealand; and the MacDiarmid Institute for Advanced Materials and Nanotechnology; Palmerston North 4446 New Zealand
| | - Justin J. Gooding
- School of Chemistry and Electron Microscopy Unit; of the Mark Wainwright Analytical Centre; University of New South Wales; Sydney NSW 2052 Australia
- Australian Centre for Nanomedicine; University of New South Wales; Sydney NSW 2052 Australia
| | - Richard D. Tilley
- School of Chemistry and Electron Microscopy Unit; of the Mark Wainwright Analytical Centre; University of New South Wales; Sydney NSW 2052 Australia
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30
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Chandra S, Ghosh B, Beaune G, Nagarajan U, Yasui T, Nakamura J, Tsuruoka T, Baba Y, Shirahata N, Winnik FM. Functional double-shelled silicon nanocrystals for two-photon fluorescence cell imaging: spectral evolution and tuning. NANOSCALE 2016; 8:9009-19. [PMID: 27076260 DOI: 10.1039/c6nr01437b] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Functional near-IR (NIR) emitting nanoparticles (NPs) adapted for two-photon excitation fluorescence cell imaging were obtained starting from octadecyl-terminated silicon nanocrystals (ncSi-OD) of narrow photoluminescence (PL) spectra having no long emission tails, continuously tunable over the 700-1000 nm window, PL quantum yields exceeding 30%, and PL lifetimes of 300 μs or longer. These NPs, consisting of a Pluronic F127 shell and a core made up of assembled ncSi-OD kept apart by an octadecyl (OD) layer, were readily internalized into the cytosol, but not the nucleus, of NIH3T3 cells and were non-toxic. Asymmetrical field-flow fractionation (AF4) analysis was carried out to determine the size of the NPs in water. HiLyte Fluor 750 amine was linked via an amide link to NPs prepared with Pluronic-F127-COOH, as a first demonstration of functional NIR-emitting water dispersible ncSi-based nanoparticles.
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Affiliation(s)
- Sourov Chandra
- WPI International Centre for Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan.
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31
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Zarschler K, Rocks L, Licciardello N, Boselli L, Polo E, Garcia KP, De Cola L, Stephan H, Dawson KA. Ultrasmall inorganic nanoparticles: State-of-the-art and perspectives for biomedical applications. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:1663-701. [PMID: 27013135 DOI: 10.1016/j.nano.2016.02.019] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/08/2016] [Accepted: 02/15/2016] [Indexed: 12/31/2022]
Abstract
Ultrasmall nanoparticulate materials with core sizes in the 1-3nm range bridge the gap between single molecules and classical, larger-sized nanomaterials, not only in terms of spatial dimension, but also as regards physicochemical and pharmacokinetic properties. Due to these unique properties, ultrasmall nanoparticles appear to be promising materials for nanomedicinal applications. This review overviews the different synthetic methods of inorganic ultrasmall nanoparticles as well as their properties, characterization, surface modification and toxicity. We moreover summarize the current state of knowledge regarding pharmacokinetics, biodistribution and targeting of nanoscale materials. Aside from addressing the issue of biomolecular corona formation and elaborating on the interactions of ultrasmall nanoparticles with individual cells, we discuss the potential diagnostic, therapeutic and theranostic applications of ultrasmall nanoparticles in the emerging field of nanomedicine in the final part of this review.
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Affiliation(s)
- Kristof Zarschler
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden, Germany.
| | - Louise Rocks
- Centre For BioNano Interactions (CBNI), School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Nadia Licciardello
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden, Germany; Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (ISIS), 8 allée Gaspard Monge, Strasbourg, France; Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT) Campus North, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, Germany
| | - Luca Boselli
- Centre For BioNano Interactions (CBNI), School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ester Polo
- Centre For BioNano Interactions (CBNI), School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Karina Pombo Garcia
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden, Germany
| | - Luisa De Cola
- Laboratoire de Chimie et des Biomatériaux Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires (ISIS), 8 allée Gaspard Monge, Strasbourg, France; Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT) Campus North, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, Germany
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, Dresden, Germany
| | - Kenneth A Dawson
- Centre For BioNano Interactions (CBNI), School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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32
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Cheng X, Hinde E, Owen DM, Lowe SB, Reece PJ, Gaus K, Gooding JJ. Enhancing Quantum Dots for Bioimaging using Advanced Surface Chemistry and Advanced Optical Microscopy: Application to Silicon Quantum Dots (SiQDs). ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:6144-50. [PMID: 26331712 DOI: 10.1002/adma.201503223] [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] [Received: 07/04/2015] [Revised: 07/23/2015] [Indexed: 05/24/2023]
Abstract
Fluorescence lifetime imaging microscopy is successfully demonstrated in both one- and two-photon cases with surface modified, nanocrystalline silicon quantum dots in the context of bioimaging. The technique is further demonstrated in combination with Förster resonance energy transfer studies where the color of the nanoparticles is tuned by using organic dye acceptors directly conjugated onto the nanoparticle surface.
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Affiliation(s)
- Xiaoyu Cheng
- School of Chemistry, Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Elizabeth Hinde
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences, ARC Centre of Excellence in Advanced Molecular Imaging, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Dylan M Owen
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences, ARC Centre of Excellence in Advanced Molecular Imaging, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Stuart B Lowe
- School of Chemistry, Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Peter J Reece
- School of Physics, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Katharina Gaus
- EMBL Australia Node in Single Molecule Science, School of Medical Sciences, ARC Centre of Excellence in Advanced Molecular Imaging, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - J Justin Gooding
- School of Chemistry, Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, NSW, 2052, Australia
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33
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Zhukhovitskiy AV, MacLeod MJ, Johnson JA. Carbene Ligands in Surface Chemistry: From Stabilization of Discrete Elemental Allotropes to Modification of Nanoscale and Bulk Substrates. Chem Rev 2015; 115:11503-32. [DOI: 10.1021/acs.chemrev.5b00220] [Citation(s) in RCA: 223] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Aleksandr V. Zhukhovitskiy
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Michelle J. MacLeod
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Jeremiah A. Johnson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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34
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Joo J, Liu X, Kotamraju VR, Ruoslahti E, Nam Y, Sailor MJ. Gated Luminescence Imaging of Silicon Nanoparticles. ACS NANO 2015; 9:6233-41. [PMID: 26034817 PMCID: PMC4931905 DOI: 10.1021/acsnano.5b01594] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The luminescence lifetime of nanocrystalline silicon is typically on the order of microseconds, significantly longer than the nanosecond lifetimes exhibited by fluorescent molecules naturally present in cells and tissues. Time-gated imaging, where the image is acquired at a time after termination of an excitation pulse, allows discrimination of a silicon nanoparticle probe from these endogenous signals. Because of the microsecond time scale for silicon emission, time-gated imaging is relatively simple to implement for this biocompatible and nontoxic probe. Here a time-gated system with ∼10 ns resolution is described, using an intensified CCD camera and pulsed LED or laser excitation sources. The method is demonstrated by tracking the fate of mesoporous silicon nanoparticles containing the tumor-targeting peptide iRGD, administered by retro-orbital injection into live mice. Imaging of such systemically administered nanoparticles in vivo is particularly challenging because of the low concentration of probe in the targeted tissues and relatively high background signals from tissue autofluorescence. Contrast improvements of >100-fold (relative to steady-state imaging) is demonstrated in the targeted tissues.
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Affiliation(s)
- Jinmyoung Joo
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, mc 0358, La Jolla, California 92093, United States
| | - Xiangyou Liu
- Cancer Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, United States
| | - Venkata Ramana Kotamraju
- Cancer Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, United States
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, United States
- Center for Nanomedicine and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California 93106-9610, United States
| | - Yoonkey Nam
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, mc 0358, La Jolla, California 92093, United States
- Address correspondence to
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35
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Fan JW, Vankayala R, Chang CL, Chang CH, Chiang CS, Hwang KC. Preparation, cytotoxicity and in vivo bioimaging of highly luminescent water-soluble silicon quantum dots. NANOTECHNOLOGY 2015; 26:215703. [PMID: 25943071 DOI: 10.1088/0957-4484/26/21/215703] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Designing various inorganic nanomaterials that are cost effective, water soluble, optically photostable, highly fluorescent and biocompatible for bioimaging applications is a challenging task. Similar to semiconducting quantum dots (QDs), silicon QDs are another alternative and are highly fluorescent, but non-water soluble. Several surface modification strategies were adopted to make them water soluble. However, the photoluminescence of Si QDs was seriously quenched in the aqueous environment. In this report, highly luminescent, water-dispersible, blue- and green-emitting Si QDs were prepared with good photostability. In vitro studies in monocytes reveal that Si QDs exhibit good biocompatibility and excellent distribution throughout the cytoplasm region, along with the significant fraction translocated into the nucleus. The in vivo zebrafish studies also reveal that Si QDs can be evenly distributed in the yolk-sac region. Overall, our results demonstrate the applicability of water-soluble and highly fluorescent Si QDs as excellent in vitro and in vivo bioimaging probes.
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Affiliation(s)
- Jing-Wun Fan
- Chemical System Research Division, National Chung-Shan Institute of Science & Technology, PO Box 90008-17, Lung-Tan, Tao-Yuan 32599, Taiwan
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36
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Rakovich A, Albella P, Maier SA. Plasmonic control of radiative properties of semiconductor quantum dots coupled to plasmonic ring cavities. ACS NANO 2015; 9:2648-2658. [PMID: 25602764 DOI: 10.1021/nn506433e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In recent years, a lot of effort has been made to achieve controlled delivery of target particles to the hotspots of plasmonic nanoantennas, in order to probe and/or exploit the extremely large field enhancements produced by such structures. While in many cases such high fields are advantageous, there are instances where they should be avoided. In this work, we consider the implications of using the standard nanoantenna geometries when colloidal quantum dots are employed as target entities. We show that in this case, and for various reasons, dimer antennas are not the optimum choice. Plasmonic ring cavities are a better option despite low field enhancements, as they allow collective coupling of many quantum dots in a reproducible and predictable manner. In cases where larger field enhancements are required, or for larger quantum dots, nonconcentric ring-disk cavities can be employed instead.
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Affiliation(s)
| | - Pablo Albella
- EXSS Group, Physics Department, Imperial College London, London, SW7 2AZ, U.K
| | - Stefan A Maier
- EXSS Group, Physics Department, Imperial College London, London, SW7 2AZ, U.K
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37
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Purkait TK, Iqbal M, Wahl MH, Gottschling K, Gonzalez CM, Islam MA, Veinot JGC. Borane-Catalyzed Room-Temperature Hydrosilylation of Alkenes/Alkynes on Silicon Nanocrystal Surfaces. J Am Chem Soc 2014; 136:17914-7. [DOI: 10.1021/ja510120e] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Tapas K. Purkait
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta Canada T6G 2G2
| | - Muhammad Iqbal
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta Canada T6G 2G2
| | - Maike H. Wahl
- Department
of Chemistry, Technische Universität München, Lichtenbergstraße
4, 85748 Garching, Germany
| | - Kerstin Gottschling
- Department
of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstraße
5-13, 81377 München, Germany
| | - Christina M. Gonzalez
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta Canada T6G 2G2
| | - Muhammad Amirul Islam
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta Canada T6G 2G2
| | - Jonathan G. C. Veinot
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta Canada T6G 2G2
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