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Li H, Li Y, Tang W, Zhong H, Zhao J, Bai X, Sha S, Xu D, Lei P, Gao Y. Assessment of the Bioavailability of Mercury Sulfides in Paddy Soils Using Sodium Thiosulfate Extraction - Results from Microcosm Experiments. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:764-770. [PMID: 35305130 DOI: 10.1007/s00128-022-03483-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Mercury sulfides (HgS), one of the largest Hg sinks in the lithosphere, has long been considered to be highly inert. Recently, several HgS speciation (e.g., nano- or micro-sized HgS particles) in paddy soils have been found to be reactive and bioavailable, increasing the possibility of methylation and bioaccumulation and posing a potential risk to humans. However, a simple and uniform method for investigating HgS bioavailability is still lacking. To address this issue, we extracted dissolved Hg from HgS particles by sodium thiosulfate (Na2S2O3) in paddy soils and analyzed the correlation between extracted Hg and soil methylmercury (MeHg). Results showed that the amounts of Hg extracted by Na2S2O3 had a strong positive correlation with the levels of soil MeHg (R 2 adj = 0.893, p < 0.05). It is suggested that Na2S2O3 extraction may be a good method of predicting Hg bioavailability in paddy soils. Our results would help to give clues in better predicting Hg risk in natural environments.
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Affiliation(s)
- Hong Li
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
- Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
| | - Yunyun Li
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
| | - Wenli Tang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, 210023, Nanjing, China
| | - Huan Zhong
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, 210023, Nanjing, China
| | - Jiating Zhao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
| | - Xu Bai
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Shengnan Sha
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Diandou Xu
- Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
| | - Pei Lei
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, 210023, Nanjing, China.
| | - Yuxi Gao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China.
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Ottonelli I, Duskey JT, Rinaldi A, Grazioli MV, Parmeggiani I, Vandelli MA, Wang LZ, Prud’homme RK, Tosi G, Ruozi B. Microfluidic Technology for the Production of Hybrid Nanomedicines. Pharmaceutics 2021; 13:1495. [PMID: 34575571 PMCID: PMC8465086 DOI: 10.3390/pharmaceutics13091495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/06/2021] [Accepted: 09/13/2021] [Indexed: 12/15/2022] Open
Abstract
Microfluidic technologies have recently been applied as innovative methods for the production of a variety of nanomedicines (NMeds), demonstrating their potential on a global scale. The capacity to precisely control variables, such as the flow rate ratio, temperature, total flow rate, etc., allows for greater tunability of the NMed systems that are more standardized and automated than the ones obtained by well-known benchtop protocols. However, it is a crucial aspect to be able to obtain NMeds with the same characteristics of the previously optimized ones. In this study, we focused on the transfer of a production protocol for hybrid NMeds (H-NMeds) consisting of PLGA, Cholesterol, and Pluronic® F68 from a benchtop nanoprecipitation method to a microfluidic device. For this aim, we modified parameters such as the flow rate ratio, the concentration of core materials in the organic phase, and the ratio between PLGA and Cholesterol in the feeding organic phase. Outputs analysed were the chemico-physical properties, such as size, PDI, and surface charge, the composition in terms of %Cholesterol and residual %Pluronic® F68, their stability to lyophilization, and the morphology via atomic force and electron microscopy. On the basis of the results, even if microfluidic technology is one of the unique procedures to obtain industrial production of NMeds, we demonstrated that the translation from a benchtop method to a microfluidic one is not a simple transfer of already established parameters, with several variables to be taken into account and to be optimized.
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Affiliation(s)
- Ilaria Ottonelli
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
- Clinical and Experimental Medicine Ph.D. Program, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Jason Thomas Duskey
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
| | - Arianna Rinaldi
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
- Clinical and Experimental Medicine Ph.D. Program, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Maria Vittoria Grazioli
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
| | - Irene Parmeggiani
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
| | - Maria Angela Vandelli
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
| | - Leon Z. Wang
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA; (L.Z.W.); (R.K.P.)
| | - Robert K. Prud’homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA; (L.Z.W.); (R.K.P.)
| | - Giovanni Tosi
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
| | - Barbara Ruozi
- Nanotech Lab, Te. Far.T.I., Department Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy; (I.O.); (J.T.D.); (A.R.); (M.V.G.); (I.P.); (M.A.V.); (B.R.)
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3
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Forde A, Fagan JA, Schaller RD, Thomas SA, Brown SL, Kurtti MB, Petersen RJ, Kilin DS, Hobbie EK. Brightly Luminescent CsPbBr 3 Nanocrystals through Ultracentrifugation. J Phys Chem Lett 2020; 11:7133-7140. [PMID: 32787334 DOI: 10.1021/acs.jpclett.0c01936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Using a combination of density-gradient and analytical ultracentrifugation, we studied the photophysical profile of CsPbBr3 nanocrystal (NC) suspensions by separating them into size-resolved fractions. Ultracentrifugation drastically alters the ligand profile of the NCs, which necessitates postprocessing to restore colloidal stability and enhance quantum yield (QY). Rejuvenated fractions show a 50% increase in QY compared to no treatment and a 30% increase with respect to the parent. Our results demonstrate how the NC environment can be manipulated to improve photophysical performance, even after there has been a measurable decline in the response. Size separation reveals blue-emitting fractions, a narrowing of photoluminescence spectra in comparison to the parent, and a crossover from single- to stretched-exponential relaxation dynamics with decreasing NC size. As a function of edge length, L, our results confirm that the photoluminescence peak energy scales a L-2, in agreement with the simplest picture of quantum confinement.
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Affiliation(s)
- Aaron Forde
- Materials & Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Jeffrey A Fagan
- National Institute of Standards & Technology, Gaithersburg, Maryland 20899, United States
| | - Richard D Schaller
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Salim A Thomas
- Materials & Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Samuel L Brown
- Materials & Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Matthew B Kurtti
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Reed J Petersen
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Dmitri S Kilin
- Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Erik K Hobbie
- Materials & Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
- Department of Coatings & Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
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4
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Ivaneev AI, Ermolin MS, Fedotov PS, Faucher S, Lespes G. Sedimentation Field-flow Fractionation in Thin Channels and Rotating Coiled Columns: From Analytical to Preparative Scale Separations. SEPARATION AND PURIFICATION REVIEWS 2020. [DOI: 10.1080/15422119.2020.1784940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alexandr I. Ivaneev
- National University of Science and Technology ‘MISIS’, Moscow, Russian Federation
- Université de Pau et des Pays de l’Adour (2ES/UPPA), Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR UPPA/CNRS, Hélioparc, 2, Avenue Angot, 64000 Pau, France
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Mikhail S. Ermolin
- National University of Science and Technology ‘MISIS’, Moscow, Russian Federation
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Petr S. Fedotov
- National University of Science and Technology ‘MISIS’, Moscow, Russian Federation
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Stéphane Faucher
- Université de Pau et des Pays de l’Adour (2ES/UPPA), Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR UPPA/CNRS, Hélioparc, 2, Avenue Angot, 64000 Pau, France
| | - Gaëtane Lespes
- Université de Pau et des Pays de l’Adour (2ES/UPPA), Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR UPPA/CNRS, Hélioparc, 2, Avenue Angot, 64000 Pau, France
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5
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Pringle TA, Hunter KI, Brumberg A, Anderson KJ, Fagan JA, Thomas SA, Petersen RJ, Sefannaser M, Han Y, Brown SL, Kilin DS, Schaller RD, Kortshagen UR, Boudjouk PR, Hobbie EK. Bright Silicon Nanocrystals from a Liquid Precursor: Quasi-Direct Recombination with High Quantum Yield. ACS NANO 2020; 14:3858-3867. [PMID: 32150383 DOI: 10.1021/acsnano.9b09614] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Silicon nanocrystals (SiNCs) with bright bandgap photoluminescence (PL) are of current interest for a range of potential applications, from solar windows to biomedical contrast agents. Here, we use the liquid precursor cyclohexasilane (Si6H12) for the plasma synthesis of colloidal SiNCs with exemplary core emission. Through size separation executed in an oxygen-shielded environment, we achieve PL quantum yields (QYs) approaching 70% while exposing intrinsic constraints on efficient core emission from smaller SiNCs. Time-resolved PL spectra of these fractions in response to femtosecond pulsed excitation reveal a zero-phonon radiative channel that anticorrelates with QY, which we model using advanced computational methods applied to a 2 nm SiNC. Our results offer additional insight into the photophysical interplay of the nanocrystal surface, quasi-direct recombination, and efficient SiNC core PL.
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Affiliation(s)
- Todd A Pringle
- Materials and Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Katharine I Hunter
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Alexandra Brumberg
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Kenneth J Anderson
- Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Jeffrey A Fagan
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Salim A Thomas
- Materials and Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Reed J Petersen
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Mahmud Sefannaser
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Yulun Han
- Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Samuel L Brown
- Materials and Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Dmitri S Kilin
- Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Richard D Schaller
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Uwe R Kortshagen
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Philip Raymond Boudjouk
- Department of Chemistry & Biochemistry, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Erik K Hobbie
- Materials and Nanotechnology Program, North Dakota State University, Fargo, North Dakota 58108, United States
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, United States
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, United States
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6
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Li P, Kumar A, Ma J, Kuang Y, Luo L, Sun X. Density gradient ultracentrifugation for colloidal nanostructures separation and investigation. Sci Bull (Beijing) 2018; 63:645-662. [PMID: 36658885 DOI: 10.1016/j.scib.2018.04.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 01/21/2023]
Abstract
In this article, we review the advancement in nanoseparation and concomitant purification of nanoparticles (NPs) by using density gradient ultracentrifugation technique (DGUC) and demonstrated by taking several typical examples. Study emphasizes the conceptual advances in classification, mechanism of DGUC and synthesis-structure-property relationships of NPs to provide the significant clue for the further synthesis optimization. Separation, concentration, and purification of NPs by DGUC can be achieved at the same time by introducing the water/oil interfaces into the separation chamber. We can develop an efficient method "lab in a tube" by introducing a reaction zone or an assembly zone in the gradient to find the surface reaction and assembly mechanism of NPs since the reaction time can be precisely controlled and the chemical environment change can be extremely fast. Finally, to achieve the best separation parameters for the colloidal systems, we gave the mathematical descriptions and computational optimized models as a new direction for making practicable and predictable DGUC separation method. Thus, it can be helpful for an efficient separation as well as for the synthesis optimization, assembly and surface reactions as a potential cornerstone for the future development in the nanotechnology and this review can be served as a plethora of advanced notes on the DGUC separation method.
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Affiliation(s)
- Pengsong Li
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Anuj Kumar
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jun Ma
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yun Kuang
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Liang Luo
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiaoming Sun
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Shaparenko NO, Beketova DI, Demidova MG, Bulavchenko AI. Effect of AOT Microemulsion Composition on the Hydrodynamic Diameter and Electrophoretic Mobility of Titanium Oxide Nanoparticles. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418050278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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8
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Oves M, Aslam M, Rauf MA, Qayyum S, Qari HA, Khan MS, Alam MZ, Tabrez S, Pugazhendhi A, Ismail IMI. Antimicrobial and anticancer activities of silver nanoparticles synthesized from the root hair extract of Phoenix dactylifera. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 89:429-443. [PMID: 29752116 DOI: 10.1016/j.msec.2018.03.035] [Citation(s) in RCA: 176] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 03/13/2018] [Accepted: 03/30/2018] [Indexed: 12/18/2022]
Abstract
There is a continuous rise in the rate of medicine consumption because of the development of drug resistance by microbial pathogens. In the last one decade, silver nanoparticles (AgNPs) have become a remarkable choice for the development of new drugs due to their excellent broad-spectrum antimicrobial activity. In the current piece of work, we have synthesized AgNPs from the root extract of Phoenix dactylifera to test their antimicrobial and anti-cancer potential. UV-visible spectra showed the surface plasmon resonance peak at 420 nm λmax corresponding to the formation of silver nanoparticles, FTIR spectra further confirmed the involvement of biological moieties in AgNPs synthesis. Moreover, XRD analysis showed the crystalline nature of AgNPs and predicted the crystallite size of 15 to 40 nm. Electron microscopy analyses confirmed their spherical shape. In addition, synthesized AgNPs was also found to control the growth of C. albicans and E. coli on solid nutrient medium with 20 and 22 mm zone of inhibition, respectively. The 100% potency at 40 μg/ml AgNPs concentration was observed against E. coli and C. albicans after 4 h and 48 h incubation respectively. Importantly, AgNPs were also found to decrease the cell viability of MCF7 cell lines in vitro with IC50 values of 29.6 μg/ml and could act as a controlling agent of human breast cancer. Based on our results, we conclude that biologically synthesized AgNPs exhibited multifunctional properties and could be used against human cancer and other infectious diseases.
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Affiliation(s)
- Mohammad Oves
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia.
| | - Mohammad Aslam
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
| | - Mohd Ahmar Rauf
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Shariq Qayyum
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Huda A Qari
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia; Department of Biological Science, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
| | - Mohd Shahnawaz Khan
- Protein Research Chair, Department of Biochemistry, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammad Zubair Alam
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
| | - Shams Tabrez
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
| | - Arivalagan Pugazhendhi
- Innovative Green Product Synthesis and Renewable Environment Development Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam
| | - Iqbal M I Ismail
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia; Department of Chemistry, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
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Shen Y, Gee MY, Greytak AB. Purification technologies for colloidal nanocrystals. Chem Commun (Camb) 2018; 53:827-841. [PMID: 27942615 DOI: 10.1039/c6cc07998a] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Almost all applications of colloidal nanocrystals require some type of purification or surface modification process following nanocrystal growth. Nanocrystal purification - the separation of nanocrystals from undesired solution components - can perturb the surface chemistry and thereby the physical properties of colloidal nanocrystals due to changes in solvent, solute concentrations, and exposure of the nanocrystal surface to oxidation or hydrolysis. For example, nanocrystal quantum dots frequently exhibit decreased photoluminescence brightness after precipitation from the growth solvent and subsequent redissolution. Consequently, purification is an integral part of the synthetic chemistry of colloidal nanocrystals, and the effect of purification methods must be considered in order to accurately compare and predict the behavior of otherwise similar nanocrystal samples. In this Feature Article we examine established and emerging approaches to the purification of colloidal nanoparticles from a nanocrystal surface chemistry viewpoint. Purification is generally achieved by exploiting differences in properties between the impurities and the nanoparticles. Three distinct properties are typically manipulated: polarity (relative solubility), electrophoretic mobility, and size. We discuss precipitation, extraction, electrophoretic methods, and size-based methods including ultracentrifugation, ultrafiltration, diafiltration, and size-exclusion chromatography. The susceptibility of quantum dots to changes in surface chemistry, with changes in photoluminescence decay associated with surface chemical changes, extends even into the case of core/shell structures. Accordingly, the goal of a more complete description of quantum dot surface chemistry has been a driver of innovation in colloidal nanocrystal purification methods. We specifically examine the effect of purification on surface chemistry and photoluminescence in quantum dots as an example of the challenges associated with nanocrystal purification and how improved understanding can result from increasingly precise techniques, and associated surface-sensitive analytical methods.
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Affiliation(s)
- Yi Shen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA.
| | - Megan Y Gee
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA.
| | - A B Greytak
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA. and USC Nanocenter, University of South Carolina, Columbia, SC 29208, USA
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10
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Liu X, Kang J, Liu B, Yang J. Separation of gold nanowires and nanoparticles through a facile process of centrifugation. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.09.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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11
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Nanoformulation of Leonotis leonurus to improve its bioavailability as a potential antidiabetic drug. 3 Biotech 2017; 7:344. [PMID: 28955641 DOI: 10.1007/s13205-017-0986-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 09/18/2017] [Indexed: 01/06/2023] Open
Abstract
Nanostructured lipid carriers (NLCs) of Leonotis leonurus were successfully produced using high-pressure homogenisation (HPH) on a LAB 40 homogeniser. The particle size was determined for the formulation as well as short-term stability study. The formulation was exposed to Chang liver cells for a glucose uptake study and to INS-1 cells for a chronic insulin release study under normoglycaemic and hyperglycaemic conditions. The particle size of the extract NLC was 220 nm with a PdI of 0.08 after homogenisation at 800 bar. The formulation was stable at the tested temperatures. The extract NLC formulation at 1 µg/ml improved glucose uptake, relative to the control liver cells. Insulin release in INS-1 cells was also elevated under hyperglycaemic conditions when exposed to the NLCs, in comparison with the control untreated cells and the non-formulated extract. The plant extract encapsulated in NLC improved the uptake of glucose and enhanced the insulin sensitivity in vitro, compared to the extract.
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12
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Alzaid M, Roth J, Wang Y, Almutairi E, Brown SL, Dumitrică T, Hobbie EK. Enhancing the Elasticity of Ultrathin Single-Wall Carbon Nanotube Films with Colloidal Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7889-7895. [PMID: 28742968 DOI: 10.1021/acs.langmuir.7b01988] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thin bilayers of contrasting nanomaterials are ubiquitous in solution-processed electronic devices and have potential relevance to a number of applications in flexible electronics. Motivated by recent mesoscopic simulations demonstrating synergistic mechanical interactions between thin films of single-wall carbon nanotubes (SWCNTs) and spherical nanocrystal (NC) inclusions, we use a thin-film wrinkling approach to query the compressive mechanics of hybrid nanotube/nanocrystal coatings adhered to soft polymer substrates. Our results show an almost 2-fold enhancement in the Young modulus of a sufficiently thin SWCNT film associated with the presence of a thin interpenetrating overlayer of semiconductor NCs. Mesoscopic distinct-element method simulations further support the experimental findings by showing that the additional noncovalent interfaces introduced by nanocrystals enhance the modulus of the SWCNT network and hinder network wrinkling.
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Affiliation(s)
- Meshal Alzaid
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Joseph Roth
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Yuezhou Wang
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities , Minneapolis, Minnesota 55455, United States
| | - Eid Almutairi
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Samuel L Brown
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Traian Dumitrică
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities , Minneapolis, Minnesota 55455, United States
- Department of Mechanical Engineering, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Erik K Hobbie
- North Dakota State University , Fargo, North Dakota 58108, United States
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13
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Semi-preparative asymmetrical flow field-flow fractionation: A closer look at channel dimensions and separation performance. J Chromatogr A 2017; 1499:149-157. [DOI: 10.1016/j.chroma.2017.03.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/09/2017] [Accepted: 03/10/2017] [Indexed: 01/17/2023]
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14
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Brown SL, Miller JB, Anthony RJ, Kortshagen UR, Kryjevski A, Hobbie EK. Abrupt Size Partitioning of Multimodal Photoluminescence Relaxation in Monodisperse Silicon Nanocrystals. ACS NANO 2017; 11:1597-1603. [PMID: 28140563 DOI: 10.1021/acsnano.6b07285] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Intrinsic constraints on efficient photoluminescence (PL) from smaller alkene-capped silicon nanocrystals (SiNCs) put limits on potential applications, but the root cause of such effects remains elusive. Here, plasma-synthesized colloidal SiNCs separated into monodisperse fractions reveal an abrupt size-dependent partitioning of multilevel PL relaxation, which we study as a function of temperature. Guided by theory and simulation, we explore the potential role of resonant phonon interactions with "minigaps" that emerge in the electronic density of states (DOS) under strong quantum confinement. Such higher-order structures can be very sensitive to SiNC surface chemistry, which we suggest might explain the common implication of surface effects in both the emergence of multimodal PL relaxation and the loss of quantum yield with decreasing nanocrystal size. Our results have potentially profound implications for optimizing the radiative recombination kinetics and quantum yield of smaller ligand-passivated SiNCs.
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Affiliation(s)
- Samuel L Brown
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Joseph B Miller
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Rebecca J Anthony
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Uwe R Kortshagen
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Andrei Kryjevski
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Erik K Hobbie
- North Dakota State University , Fargo, North Dakota 58108, United States
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15
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Zhu J, Hersam MC. Assembly and Electronic Applications of Colloidal Nanomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1603895. [PMID: 27862354 DOI: 10.1002/adma.201603895] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/01/2016] [Indexed: 06/06/2023]
Abstract
Artificial solids and thin films assembled from colloidal nanomaterials give rise to versatile properties that can be exploited in a range of technologies. In particular, solution-based processes allow for the large-scale and low-cost production of nanoelectronics on rigid or mechanically flexible substrates. To achieve this goal, several processing steps require careful consideration, including nanomaterial synthesis or exfoliation, purification, separation, assembly, hybrid integration, and device testing. Using a ubiquitous electronic device - the field-effect transistor - as a platform, colloidal nanomaterials in three electronic material categories are reviewed systematically: semiconductors, conductors, and dielectrics. The resulting comparative analysis reveals promising opportunities and remaining challenges for colloidal nanomaterials in electronic applications, thereby providing a roadmap for future research and development.
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Affiliation(s)
- Jian Zhu
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois, 60208-3108, USA
| | - Mark C Hersam
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois, 60208-3108, USA
- Graduate Program in Applied Physics, Department of Chemistry, Department of Medicine, Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL, 60208-3108, USA
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16
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Wu JK, Tian ZQ, Zhang ZL, Liu AA, Tang B, Zhang LJ, Chen ZL, Pang DW. Purification of quantum dot-based bioprobes via high-performance size exclusion chromatography. Talanta 2016; 159:64-73. [DOI: 10.1016/j.talanta.2016.05.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 05/24/2016] [Accepted: 05/30/2016] [Indexed: 12/19/2022]
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17
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Wen CY, Tang M, Hu J, Wu LL, Pang DW, Zeng JB, Li XY. Determination of the Absolute Number Concentration of Nanoparticles and the Active Affinity Sites on Their Surfaces. Anal Chem 2016; 88:10134-10142. [DOI: 10.1021/acs.analchem.6b02613] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Cong-Ying Wen
- College
of Science, China University of Petroleum (East China), Qingdao, Shandong 266580, P. R. China
- Key
Laboratory of Analytical Chemistry for Biology and Medicine (Ministry
of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Man Tang
- Key
Laboratory of Analytical Chemistry for Biology and Medicine (Ministry
of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Jiao Hu
- Key
Laboratory of Analytical Chemistry for Biology and Medicine (Ministry
of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Ling-Ling Wu
- Key
Laboratory of Analytical Chemistry for Biology and Medicine (Ministry
of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Dai-Wen Pang
- Key
Laboratory of Analytical Chemistry for Biology and Medicine (Ministry
of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Jing-Bin Zeng
- College
of Science, China University of Petroleum (East China), Qingdao, Shandong 266580, P. R. China
| | - Xi-You Li
- College
of Science, China University of Petroleum (East China), Qingdao, Shandong 266580, P. R. China
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18
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Gilroy KD, Xia Y. Dimerization of Colloidal Particles through Controlled Aggregation for Enhanced Properties and Applications. Chem Asian J 2016; 11:2341-51. [DOI: 10.1002/asia.201600979] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Kyle D. Gilroy
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 (USA)
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 (USA)
- School of Chemistry&Biochemistry School of Chemical&Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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19
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Harris JM, Headrick RJ, Semler MR, Fagan JA, Pasquali M, Hobbie EK. Impact of SWCNT processing on nanotube-silicon heterojunctions. NANOSCALE 2016; 8:7969-7977. [PMID: 27009759 DOI: 10.1039/c5nr08703a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Single-wall carbon nanotube (SWCNT) films are ideal components for thin, flexible, and durable electronic devices. Here, we use a variety of processing approaches to fabricate SWCNT-silicon heterojunctions from both unsorted and chirality-enriched SWCNTs. Through measured structure/processing/property relationships, we quantify the influence of SWCNT purity, alignment and residual doping on device performance and diode characteristics. Our results show that mixed-type unaligned SWCNTs processed in super-acid solvents can achieve state-of-the-art performance. The devices perform comparably to those fabricated from type or chiral-purified SWCNTs, despite what appear to be significant deviations from ideal diode behavior. Our results clarify a direct route for processing nanotube-silicon heterojunctions while providing additional insight into the underlying nature of these devices.
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Affiliation(s)
- John M Harris
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA.
| | - Robert J Headrick
- Department of Chemistry, Rice University, Houston, Texas 77005, USA and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, USA
| | - Matthew R Semler
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA.
| | - Jeffrey A Fagan
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Matteo Pasquali
- Department of Chemistry, Rice University, Houston, Texas 77005, USA and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, USA and Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
| | - Erik K Hobbie
- Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA. and Department of Coatings & Polymeric Materials, North Dakota State University, Fargo, North Dakota 58108, USA
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20
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Miller JB, Dandu N, Velizhanin KA, Anthony RJ, Kortshagen UR, Kroll DM, Kilina S, Hobbie EK. Enhanced Luminescent Stability through Particle Interactions in Silicon Nanocrystal Aggregates. ACS NANO 2015; 9:9772-9782. [PMID: 26348831 DOI: 10.1021/acsnano.5b02676] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Close-packed assemblies of ligand-passivated colloidal nanocrystals can exhibit enhanced photoluminescent stability, but the origin of this effect is unclear. Here, we use experiment, simulation, and ab initio computation to examine the influence of interparticle interactions on the photoluminescent stability of silicon nanocrystal aggregates. The time-dependent photoluminescence emitted by structures ranging in size from a single quantum dot to agglomerates of more than a thousand is compared with Monte Carlo simulations of noninteracting ensembles using measured single-particle blinking data as input. In contrast to the behavior typically exhibited by the metal chalcogenides, the measured photoluminescent stability shows an enhancement with respect to the noninteracting scenario with increasing aggregate size. We model this behavior using time-dependent density functional theory calculations of energy transfer between neighboring nanocrystals as a function of nanocrystal size, separation, and the presence of charge and/or surface-passivation defects. Our results suggest that rapid exciton transfer from "bright" nanocrystals to surface trap states in nearest-neighbors can efficiently fill such traps and enhance the stability of emission by promoting the radiative recombination of slowly diffusing excited electrons.
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Affiliation(s)
- Joseph B Miller
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Naveen Dandu
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Kirill A Velizhanin
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Rebecca J Anthony
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Uwe R Kortshagen
- University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Daniel M Kroll
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Svetlana Kilina
- North Dakota State University , Fargo, North Dakota 58108, United States
| | - Erik K Hobbie
- North Dakota State University , Fargo, North Dakota 58108, United States
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21
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Sánchez-Ferrer A, Carney RP, Stellacci F, Mezzenga R, Isa L. Isolation and Characterization of Monodisperse Core-Shell Nanoparticle Fractions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11179-11185. [PMID: 26406563 DOI: 10.1021/acs.langmuir.5b01811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Monodispersity is a key property to control the self-assembly of colloidal particles, and is typically reached after fine-tuning of the synthesis conditions. Monodisperse particle fractions can also be separated from polydisperse suspensions via ultracentrifugation. This paper demonstrates the capability of isolating and characterizing suspensions of core-shell iron oxide-polymer nanoparticles with extremely low polydispersity (p < 0.01) and, thus, of complementing nanoparticle synthetic approaches in the pursuit of highly monodisperse materials.
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Affiliation(s)
- Antoni Sánchez-Ferrer
- Laboratory of Food and Soft Matter, Department of Health Sciences and Technology, ETH Zurich , Schmelzbergstrasse 9, CH-8092 Zurich, Switzerland
| | - Randy P Carney
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - Francesco Stellacci
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - Raffaele Mezzenga
- Laboratory of Food and Soft Matter, Department of Health Sciences and Technology, ETH Zurich , Schmelzbergstrasse 9, CH-8092 Zurich, Switzerland
| | - Lucio Isa
- Laboratory for Interface, Soft matter and Assembly, Department of Materials, ETH Zurich , Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
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22
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Coopersmith K, Han H, Maye MM. Stepwise Assembly and Characterization of DNA Linked Two-Color Quantum Dot Clusters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7463-7471. [PMID: 26086169 DOI: 10.1021/acs.langmuir.5b01130] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The DNA-mediated self-assembly of multicolor quantum dot (QD) clusters via a stepwise approach is described. The CdSe/ZnS QDs were synthesized and functionalized with an amphiphilic copolymer, followed by ssDNA conjugation. At each functionalization step, the QDs were purified via gradient ultracentrifugation, which was found to remove excess polymer and QD aggregates, allowing for improved conjugation yields and assembly reactivity. The QDs were then assembled and disassembled in a stepwise manner at a ssDNA functionalized magnetic colloid, which provided a convenient way to remove unreacted QDs and ssDNA impurities. After assembly/disassembly, the clusters' optical characteristics were studied by fluorescence spectroscopy and the assembly morphology and stoichiometry was imaged via electron microscopy. The results indicate that a significant amount of QD-to-QD energy transfer occurred in the clusters, which was studied as a function of increasing acceptor-to-donor ratios, resulting in increased QD acceptor emission intensities compared to controls.
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Affiliation(s)
- Kaitlin Coopersmith
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Hyunjoo Han
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Mathew M Maye
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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