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Cao Y, Song Y, Fan X, Ma L, Feng T, Zeng J, Xue C, Xu J. A smartphone-assisted sensing hydrogels based on UCNPs@SiO 2-phenol red nanoprobes for detecting the pH of aquatic products. Food Chem 2024; 451:139428. [PMID: 38678665 DOI: 10.1016/j.foodchem.2024.139428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/11/2024] [Accepted: 04/18/2024] [Indexed: 05/01/2024]
Abstract
For some aquatic products, pH has been considered a useful index to reflect the changes in materials during the loss of freshness. Based on the inner filter effect (IFE) between deprotonated phenol red (PR) and upconversion nanoparticles (UCNPs), UCNPs coated with PR-doped SiO2 shell were embedded in agarose hydrogel to develop a smartphone-assisted method for pH sensing. With the enhancement of pH response using a phase transfer agent (i.e., tetra butyl ammonium hydroxide, TBAH), the proposed senor realized the colorimetric and fluorescence detection of pH in the range of pH 6.6-8 and pH 6-8, respectively. The sensor also showed satisfied reversibility when switched between pH 6 and 8 for at least 5 cycles. Moreover, this sensor displayed great sensitivity, stability, and portability in analyzing actual fish, shrimp, and shellfish samples, providing a new sight for evaluating the freshness of aquatic products.
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Affiliation(s)
- Yunrui Cao
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Yu Song
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Xiaowei Fan
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China
| | - Lei Ma
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
| | - Tingyu Feng
- Qingdao Institute of Marine Bioresources for Nutrition & Health Innovation, No. 106, Xiangyang Road, Qingdao, Shandong Province 266109, PR China
| | - Junpeng Zeng
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China
| | - Changhu Xue
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China; Qingdao Marine Science and Technology Center, Qingdao 266235, PR China.
| | - Jie Xu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province 266003, PR China.
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2
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King AM, Insinna T, Wells CJR, Raby IA, Gun'ko YK, Davies GL. Magnetically driven preparation of 1-D nano-necklaces capable of MRI relaxation enhancement. NANOSCALE ADVANCES 2023; 5:3209-3213. [PMID: 37325543 PMCID: PMC10262958 DOI: 10.1039/d3na00137g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/23/2023] [Indexed: 06/17/2023]
Abstract
We report a novel magnetically-facilitated approach to produce 1-D 'nano-necklace' arrays composed of 0-D magnetic nanoparticles, which are assembled and coated with an oxide layer to produce semi-flexible core@shell type structures. These 'nano-necklaces' demonstrate good MRI relaxation properties despite their coating and permanent alignment, with low field enhancement due to structural and magnetocrystalline anisotropy.
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Affiliation(s)
- Aaron M King
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Teresa Insinna
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Connor J R Wells
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Isabel A Raby
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Yurii K Gun'ko
- School of Chemistry, Trinity College Dublin Dublin 2 Ireland
| | - Gemma-Louise Davies
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
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3
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Steinbach JC, Fait F, Mayer HA, Kandelbauer A. Monodisperse Porous Silica/Polymer Nanocomposite Microspheres with Tunable Silica Loading, Morphology and Porosity. Int J Mol Sci 2022; 23:ijms232314977. [PMID: 36499304 PMCID: PMC9737779 DOI: 10.3390/ijms232314977] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/18/2022] [Accepted: 11/24/2022] [Indexed: 12/02/2022] Open
Abstract
Hybrid organic/inorganic nanocomposites combine the distinct properties of the organic polymer and the inorganic filler, resulting in overall improved system properties. Monodisperse porous hybrid beads consisting of tetraethylene pentamine functionalized poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) particles and silica nanoparticles (SNPs) were synthesized under Stoeber sol-gel process conditions. A wide range of hybrid organic/silica nanocomposite materials with different material properties was generated. The effects of n(H2O)/n(TEOS) and c(NH3) on the hybrid bead properties particle size, SiO2 content, median pore size, specific surface area, pore volume and size of the SNPs were studied. Quantitative models with a high robustness and predictive power were established using a statistical and systematic approach based on response surface methodology. It was shown that the material properties depend in a complex way on the process factor settings and exhibit non-linear behaviors as well as partly synergistic interactions between the process factors. Thus, the silica content, median pore size, specific surface area, pore volume and size of the SNPs are non-linearly dependent on the water-to-precursor ratio. This is attributed to the effect of the water-to-precursor ratio on the hydrolysis and condensation rates of TEOS. A possible mechanism of SNP incorporation into the porous polymer network is discussed.
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Affiliation(s)
- Julia C. Steinbach
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Fabio Fait
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Hermann A. Mayer
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Andreas Kandelbauer
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany
- Institute of Wood Technology and Renewable Materials, Department of Material Sciences and Process Engineering (MAP), University of Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Vienna, Austria
- Correspondence: ; Tel.: +49-(0)7121-271-2009
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4
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Al-Saad K, Issa AA, Idoudi S, Shomar B, Al-Ghouti MA, Al-Hashimi N, El-Azazy M. Smart Synthesis of Trimethyl Ethoxysilane (TMS) Functionalized Core-Shell Magnetic Nanosorbents Fe 3O 4@SiO 2: Process Optimization and Application for Extraction of Pesticides. Molecules 2020; 25:molecules25204827. [PMID: 33092200 PMCID: PMC7587953 DOI: 10.3390/molecules25204827] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 01/14/2023] Open
Abstract
In the current study, a smart approach for synthesizing trimethyl ethoxysilane–decorated magnetic-core silica-nanoparticles (TMS-mcSNPs) and its effectiveness as nanosorbents have been exploited. While the magnetite core was synthesized using the modified Mössbauer method, Stöber method was employed to coat the magnetic particles. The objective of this work is to maximize the magnetic properties and to minimize both particle size (PS) and particle size distribution (PSD). Using a full factorial design (2k-FFD), the influences of four factors on the coating process was assessed by optimizing the three responses (magnetic properties, PS, and PSD). These four factors were: (1) concentration of tetraethyl-orthosilicate (TEOS); (2) concentration of ammonia; (3) dose of magnetite (Fe3O4); and (4) addition mode. Magnetic properties were calculated as the attraction weight. Scanning electron microscopy (SEM) was used to determine PS, and standard deviation (±SD) was calculated to determine the PSD. Composite desirability function (D) was used to consolidate the multiple responses into a single performance characteristic. Pareto chart of standardized effects together with analysis of variance (ANOVA) at 95.0 confidence interval (CI) were used to determine statistically significant variable(s). Trimethyl ethoxysilane–functionalized mcSNPs were further applied as nanosorbents for magnetic solid phase extraction (TMS-MSPE) of organophosphorus and carbamate pesticides.
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Affiliation(s)
- Khalid Al-Saad
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; (K.A.-S.); (A.A.I.); (S.I.); (N.A.-H.)
| | - Ahmed A. Issa
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; (K.A.-S.); (A.A.I.); (S.I.); (N.A.-H.)
| | - Sourour Idoudi
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; (K.A.-S.); (A.A.I.); (S.I.); (N.A.-H.)
| | - Basem Shomar
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University, Doha 2713, Qatar;
| | - Mohammad A. Al-Ghouti
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar;
| | - Nessreen Al-Hashimi
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; (K.A.-S.); (A.A.I.); (S.I.); (N.A.-H.)
| | - Marwa El-Azazy
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar; (K.A.-S.); (A.A.I.); (S.I.); (N.A.-H.)
- Correspondence: ; Tel.: +974-44034675
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Krywko-Cendrowska A, di Leone S, Bina M, Yorulmaz-Avsar S, Palivan CG, Meier W. Recent Advances in Hybrid Biomimetic Polymer-Based Films: from Assembly to Applications. Polymers (Basel) 2020; 12:E1003. [PMID: 32357541 PMCID: PMC7285097 DOI: 10.3390/polym12051003] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/21/2022] Open
Abstract
Biological membranes, in addition to being a cell boundary, can host a variety of proteins that are involved in different biological functions, including selective nutrient transport, signal transduction, inter- and intra-cellular communication, and cell-cell recognition. Due to their extreme complexity, there has been an increasing interest in developing model membrane systems of controlled properties based on combinations of polymers and different biomacromolecules, i.e., polymer-based hybrid films. In this review, we have highlighted recent advances in the development and applications of hybrid biomimetic planar systems based on different polymeric species. We have focused in particular on hybrid films based on (i) polyelectrolytes, (ii) polymer brushes, as well as (iii) tethers and cushions formed from synthetic polymers, and (iv) block copolymers and their combinations with biomacromolecules, such as lipids, proteins, enzymes, biopolymers, and chosen nanoparticles. In this respect, multiple approaches to the synthesis, characterization, and processing of such hybrid films have been presented. The review has further exemplified their bioengineering, biomedical, and environmental applications, in dependence on the composition and properties of the respective hybrids. We believed that this comprehensive review would be of interest to both the specialists in the field of biomimicry as well as persons entering the field.
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Affiliation(s)
| | | | | | | | - Cornelia G. Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland; (A.K.-C.); (S.d.L.); (M.B.); (S.Y.-A.)
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland; (A.K.-C.); (S.d.L.); (M.B.); (S.Y.-A.)
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6
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Li WX, Zheng YS, Zhang HB, Bao JR, Li YL, Ma YY, Feng LN, Feng SY. Synthesis and characterization of luminescent SiO 2 @Eu(phen-Si) core-shell nanospheres. LUMINESCENCE 2019; 35:250-259. [PMID: 31749285 DOI: 10.1002/bio.3721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 04/17/2018] [Accepted: 09/22/2019] [Indexed: 11/10/2022]
Abstract
Four core-shell structured nanometre luminescent composites with different kernel sizes and different shell layer thicknesses (SiO2(500) @Eu (phen-Si)(50) , SiO2(500) @Eu (phen-Si)(15) , SiO2(250) @Eu (phen-Si)(5) and SiO2(250) @Eu (phen-Si)(10) ) were made by changing synthesis conditions. Here, initial subscript numbers in parentheses refer to the particle size of the SiO2 core, whereas the final subscript numbers in parentheses refer to shell layer thickness. In these composites, silica spheres of 500 nm or 250 nm were identified as the core. The shell layer was composited of silicon, 1,10-phenanthroline and europium perchlorate, abbreviated as Eu(phen-Si); the chemical formula of phen-Si was phen-N-(CONH (CH2 )Si(OCH2 CH3 )3 )2 . The composites were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and infrared spectroscopy. The monodispersed spherical SiO2 showed characteristics of a regular microstructure and a smooth surface, as well as the advantage of dispersity, shown by SEM. The Eu(phen-Si) complex was able to self-assemble into monodispersed SiO2 spheres, as seen using TEM. Fluorescence spectra indicated that the four composites had excellent luminescence properties. Furthermore, composites composed of a SiO2 core and a 250 nm kernel size exhibited stronger fluorescence than 500 nm kernel-sized composites. Fluorescence properties were affected by shell thickness: the thicker the shell, the greater the fluorescence intensity. For the four composites, quantum yield values and fluorescence lifetime corresponded to fluorescence emission intensity data as quantum yield values and fluorescence lifetime were higher, and luminescence properties increased.
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Affiliation(s)
- Wen-Xian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
| | - Yu-Shan Zheng
- Inner Mongolia Autonomous Region Food Inspection Testing Center, Hohhot, People's Republic of China
| | - Hong-Bo Zhang
- Inner Mongolia Autonomous Region Food Inspection Testing Center, Hohhot, People's Republic of China
| | - Jin-Rong Bao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
| | - Yi-Lian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
| | - Yang-Yang Ma
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
| | - Li-Na Feng
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
| | - Shu-Yan Feng
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, People's Republic of China
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7
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Fernandes RS, Raimundo IM, Pimentel MF. Revising the synthesis of Stöber silica nanoparticles: A multivariate assessment study on the effects of reaction parameters on the particle size. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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8
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Elazazy MS, Issa AA, Al-Mashreky M, Al-Sulaiti M, Al-Saad K. Application of fractional factorial design for green synthesis of cyano-modified silica nanoparticles: Chemometrics and multifarious response optimization. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.02.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Ma YY, Li WX, Zheng YS, Bao JR, Li YL, Feng LN, Yang KS, Qiao Y, Wu AP. Preparation, characterization and luminescence properties of core-shell ternary terbium composites SiO 2(600)@Tb(MABA-Si)•L. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171655. [PMID: 29657773 PMCID: PMC5882697 DOI: 10.1098/rsos.171655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/09/2018] [Indexed: 05/31/2023]
Abstract
Two novel core-shell structure ternary terbium composites SiO2(600)@Tb(MABA-Si)·L(L:dipy/phen) nanometre luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)·L2·(ClO4)3·2H2O shell grafted onto the surface of SiO2 microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH2)3Si(OCH2CH3)3)2 (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, 1HNMR, element analysis, molar conductivity, SEM and TEM. It was found that the first ligand MABA-Si of terbium ternary complex hydrolysed to generate the Si-OH and the Si-OH condensate with the Si-OH on the surface of SiO2 microspheres; then ligand MABA-Si grafted onto the surface of SiO2 microspheres. The diameter of SiO2 core of SiO2(600)@Tb(MABA-Si)·L was approximately 600 nm. Interestingly, the luminescence properties demonstrate that the two core-shell structure ternary terbium composites SiO2(600)Tb(MABA-Si)·L(dipy/phen) exhibit strong emission intensities, which are 2.49 and 3.35 times higher than that of the corresponding complexes Tb(MABA-Si)·L2·(ClO4)3·2H2O, respectively. Luminescence decay curves show that core-shell structure ternary terbium composites have longer lifetime. Excellent luminescence properties enable the core-shell materials to have potential applications in medicine, industry, luminescent fibres and various biomaterials fields.
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Affiliation(s)
- Yang-Yang Ma
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Wen-Xian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yu-Shan Zheng
- Inner Mongolia Autonomous Region food inspection test center, Hohhot 010021, People's Republic of China
| | - Jin-Rong Bao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yi-Lian Li
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Li-Na Feng
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Kui-Suo Yang
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - Yan Qiao
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
| | - An-Ping Wu
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China
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10
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Biomimetic synthesis of sericin and silica hybrid colloidosomes for stimuli-responsive anti-cancer drug delivery systems. Colloids Surf B Biointerfaces 2017; 151:102-111. [DOI: 10.1016/j.colsurfb.2016.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/07/2016] [Accepted: 12/09/2016] [Indexed: 11/18/2022]
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11
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Burrows ND, Harvey S, Idesis FA, Murphy CJ. Understanding the Seed-Mediated Growth of Gold Nanorods through a Fractional Factorial Design of Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1891-1907. [PMID: 27983861 DOI: 10.1021/acs.langmuir.6b03606] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Since the development of simple, aqueous protocols for the synthesis of anisotropic metal nanoparticles, research into many promising, valuable applications of gold nanorods has grown considerably, but a number of challenges remain, including gold-particle yield, robustness to minor impurities, and precise control of gold nanorod surface chemistry. Herein we present the results of a composite fractional factorial series of experiments designed to screen seven additional potential avenues of control and to understand the seed-mediated silver-assisted synthesis of gold nanorods. These synthesis variables are the amount of sodium borohydride used and the rate of stirring when producing seed nanoparticles, the age of and the amount of seeds added, the reaction temperature, the amounts of silver nitrate and ascorbic acid added, and the age of the reduced growth solution before seed nanoparticles are added to initiate rod formation. This statistical experimental design and analysis method, besides determining which experimental variables are important and which are not when synthesizing gold nanorods (and quantifying their effects), gives further insight into the mechanism of growth by measuring the degree to which variables interact with each other by mapping out their mechanistic connections. This work demonstrates that when forming gold nanorods by the reduction of auric ions by ascorbic acid onto seed nanoparticles, ascorbic acid determines how much gold is reduced, and the amount of seeds determine how it is divided, yet both influence the intrinsic growth rates, in both width and length, of the forming nanorods. Furthermore, this work shows that the reduction of gold proceeds via direct reduction on the surface of seeds and not through a disproportionation reaction. Further control over the length of gold nanorods can be achieved by tuning the amount of silver nitrate or the reaction temperature. This work shows that silver does not directly influence rod length or width, and a new primary role for silver is proposed as a catalyst promoting the reduction of gold on the ends of forming nanorods. Furthermore, this silver catalyst is removed from the reaction by adsorption onto the surface of the growing nanorod. This work also demonstrates the importance of freshly prepared silver nitrate and ascorbic acid solutions, free from even a few hours of photodegradation, in preparing gold nanorods with high shape purity and gold yield.
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Affiliation(s)
- Nathan D Burrows
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Samantha Harvey
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Fred A Idesis
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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12
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Fu ZF, Li WX, Bai J, Bao JR, Cao XF, Zheng YS. Synthesis, characterization and luminescence of europium perchlorate with MABA-Si complex and coating structure SiO2@Eu(MABA-Si) luminescence nanoparticles. LUMINESCENCE 2016; 32:327-333. [DOI: 10.1002/bio.3182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 06/13/2016] [Accepted: 06/13/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Zhi-Fang Fu
- College of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot People's Republic of China
| | - Wen-Xian Li
- College of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot People's Republic of China
| | - Juan Bai
- College of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot People's Republic of China
| | - Jin-Rong Bao
- College of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot People's Republic of China
| | - Xiao-fang Cao
- College of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot People's Republic of China
| | - Yu-Shan Zheng
- Inner Mongolia Autonomous Region food inspection test center; Hohhot People's Republic of China
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13
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Gao H, Wen D, Sukhorukov GB. Composite silica nanoparticle/polyelectrolyte microcapsules with reduced permeability and enhanced ultrasound sensitivity. J Mater Chem B 2015; 3:1888-1897. [DOI: 10.1039/c4tb01717j] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This work reports novel silica/polyelectrolyte composite microcapsules, which exhibit superior ultrasonic sensitivity and reduced permeability. The composite capsules were facilely incorporated with silica nanoparticles and successfully applied to encapsulate Rh-B dyes with low molecular weight.
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Affiliation(s)
- Hui Gao
- School of Engineering and Materials Science
- Queen Mary University of London
- London
- UK
| | - Dongsheng Wen
- Institute of Particle Science and Engineering
- University of Leeds
- Leeds
- UK
| | - Gleb B. Sukhorukov
- School of Engineering and Materials Science
- Queen Mary University of London
- London
- UK
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14
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Lai CH, Chang TC, Chuang YJ, Tzou DL, Lin CC. Stepwise orthogonal click chemistry toward fabrication of paclitaxel/galactose functionalized fluorescent nanoparticles for HepG2 cell targeting and delivery. Bioconjug Chem 2013; 24:1698-709. [PMID: 23987828 DOI: 10.1021/bc400219t] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this report, we used stepwise orthogonal click chemistry (SOCC) involving strain-promoted azide-alkyne cycloaddition (SPAAC) and microwave-assisted Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) to assemble an anticancer drug (paclitaxel, PTX) and a targeting ligand (trivalent galactoside, TGal) on a fluorescent silicon oxide nanoparticle (NP) by using dialkyne linker 8 as a bridge. The fluorescent NH2@Cy3SiO2NP was fabricated using a competition method to incorporate Cy3 without loss of the original surface amine density on the NPs. The concept of SOCC was first investigated in a solution-phase model study that showed quantitative reaction yield. In the fabrication of TGal-PTX@Cy3SiO2NP, the expensive compound azido-functionalized PTX 12 used in SPAAC can be easily recovered due to the absence of other reagents in the reaction mixture. High loading of the sugar ligand on the NP surface serves a targeting function and also overcomes the low water solubility of PTX. Confocal fluorescence microscopy and cytotoxicity assay showed that TGal-PTX@Cy3SiO2NP was taken up by HepG2 cells and was affected by the microtubule skeleton in these cells and inhibited the proliferation of these cells in a dose-dependent manner. The presence of a fluorescent probe, a targeting ligand, and an anticancer drug on the multifunctional TGal-PTX@Cy3SiO2NP allows for real-time imaging, specific cancer-cell targeting, and the cell-killing effect which is better than free PTX.
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Affiliation(s)
- Chian-Hui Lai
- Department of Chemistry and ‡Department of Medical Science and Institute of Bioinformatics and Structural Biology, National Tsing Hua University , 101 Sec. 2, Kuang Fu Road, Hsinchu 300, Taiwan
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Arantes TM, Pinto AH, Leite ER, Longo E, Camargo ER. Synthesis and optimization of colloidal silica nanoparticles and their functionalization with methacrylic acid. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.09.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Davies GL, McCarthy JE, Rakovich A, Gun'ko YK. Towards white luminophores: developing luminescent silica on the nanoscale. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16086b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Davies GL, Corr SA, Meledandri CJ, Briode L, Brougham DF, Gun'ko YK. NMR Relaxation of Water in Nanostructures: Analysis of Ferromagnetic Cobalt-Ferrite Polyelectrolyte Nanocomposites. Chemphyschem 2011; 12:772-6. [DOI: 10.1002/cphc.201000853] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 01/06/2011] [Indexed: 11/12/2022]
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18
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d’Angelo I, Parajó Y, Horváth A, Kéri G, La Rotonda MI, Alonso MJ. Improved delivery of angiogenesis inhibitors from PLGA:poloxamer blend micro- and nanoparticles. J Microencapsul 2010; 27:57-66. [DOI: 10.3109/02652040902954729] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Prina-Mello A, Whelan AM, Atzberger A, McCarthy JE, Byrne F, Davies GL, Coey JMD, Volkov Y, Gun'ko YK. Comparative flow cytometric analysis of immunofunctionalized nanowire and nanoparticle signatures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:247-255. [PMID: 19941303 DOI: 10.1002/smll.200901014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Flow cytometry is one of the gold-standard techniques used in clinical medicine for quantitative immunoassaying. The continuous development of its probes, commonly fluorescent nanoparticles, is important. Lately, the introduction of quantitative multiplexed immunoassay has challenged the use of nanoparticles as probes. Functionalized fluorescent silica-based magnetic nanowires are investigated under flow cytometry as a novel probe category. The preparation and full characterization of these multimodal nanowires is reported and compared to those of silica-based magnetic nanoparticles by flow cytometry. Full characterization includes transmission electron microscopy and fluorescence microscopy imaging, flow cytometric assaying, superconducting quantum interference device (SQUID) magnetization, and Mössbauer spectroscopy measurements. This work shows that loaded silica nanowires have intrinsic geometrical advantages when compared to similar spherical particles due to their unique "flow cytometry fingerprint" when utilized as magnetic carriers for immunodetection applications. These advantages account for a 17% yield in detecting the functional binding between THP-1 and ICAM-1, by utilizing a much lower concentration than that required for the nanoparticles.
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Affiliation(s)
- Adriele Prina-Mello
- Centre for Research on Adaptive Nanostructures and Nanodevices, School of Physics, Trinity College Dublin, Dublin 2, Ireland.
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