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Moncure P, Millstone JE, Laaser JE. Role of Ligand Shell Density in the Diffusive Behavior of Nanoparticles in Hydrogels. J Phys Chem B 2023; 127:9366-9377. [PMID: 37857360 PMCID: PMC10626584 DOI: 10.1021/acs.jpcb.3c03249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/01/2023] [Indexed: 10/21/2023]
Abstract
The diffusion coefficients of poly(ethylene glycol) methyl ether thiol (PEGSH)-functionalized gold nanoparticles (NPs) with different effective grafting densities were measured in polyacrylamide hydrogels. The NP core size was held constant, and the NPs were functionalized with mixtures of short oligomeric ligands (254 Da PEGSH) and longer (either 1 or 2 kDa PEGSH) ligands. The ratio of short and long ligands was varied such that the grafting density of the high-molecular-weight (MW) ligand ranged from approximately 1 to 100 high-MW ligands/NP. The diffusion coefficients of the NPs were then measured in gels with varying average mesh sizes. The measured diffusion coefficients decreased with higher MW ligand density. Interestingly, the diffusion coefficients for NPs with high effective grafting densities were well-predicted by their hydrodynamic diameters, but the diffusion coefficients for NPs with low effective grafting densities were higher than expected from their hydrodynamic diameters. These results suggest that crowding in the NP ligand shell influences the mechanism of diffusion, with lower grafting densities allowing ligand chain relaxations that facilitate movement through the gel. This work brings new insights into the factors that dictate how NPs move through hydrogels and will inform the development of models for applications such as drug delivery in complex viscoelastic biological materials.
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Affiliation(s)
- Paige
J. Moncure
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jill E. Millstone
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jennifer E. Laaser
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Moncure PJ, Simon ZC, Millstone JE, Laaser JE. Relationship between Gel Mesh and Particle Size in Determining Nanoparticle Diffusion in Hydrogel Nanocomposites. J Phys Chem B 2022; 126:4132-4142. [PMID: 35609342 DOI: 10.1021/acs.jpcb.2c00771] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The diffusion of poly(ethylene glycol) methyl ether thiol (PEGSH)-functionalized gold nanoparticles (NPs) was measured in polyacrylamide gels with various cross-linking densities. The molecular weight of the PEGSH ligand and particle core size were both varied to yield particles with hydrodynamic diameters ranging from 7 to 21 nm. The gel mesh size was varied from approximately 36 to 60 nm by controlling the cross-linking density of the gel. Because high-molecular-weight ligands are expected to yield more compressible particles, we expected the diffusion constants of the NPs to depend on their hard/soft ratios (where the hard component of the particle consists of the particle core and the soft component of the particle consists of the ligand shell). However, our measurements revealed that NP diffusion coefficients resulted primarily from changes in the overall hydrodynamic diameter and not the ratio of particle core size to ligand size. Across all particles and gels, we found that the diffusion coefficient was well predicted by the confinement ratio calculated from the diameter of the particle and an estimate of the gel mesh size obtained from the elastic blob model and was well described using a hopping model for nanoparticle diffusion. These results suggest that the elastic blob model provides a reasonable estimate of the mesh size that particles "see" as they diffuse through the gel. This work brings new insights into the factors that dictate how NPs move through polymer gels and will inform the development of hydrogel nanocomposites for applications such as drug delivery in heterogeneous, viscoelastic biological materials.
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Affiliation(s)
- Paige J Moncure
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Zoe C Simon
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jill E Millstone
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jennifer E Laaser
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Wang Q, Li L, Li Z, Guo S, Sun G. Environmentally Stable Polymer Gels with Super Deformability and High Recoverability Enhanced by Sub‐5 nm Particles in the Nonvolatile Solvent. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24826] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qiao Wang
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials EngineeringUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
| | - Lefan Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials EngineeringUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
| | - Zongjin Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials EngineeringUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
- Department of Physics and Chemistry, Faculty of Science and TechnologyUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
| | - Siyao Guo
- School of Civil EngineeringQingdao Technological University Qingdao 266033 China
| | - Guoxing Sun
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials EngineeringUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
- Department of Physics and Chemistry, Faculty of Science and TechnologyUniversity of Macau, Avenida da Universidade, Taipa Macau SAR China
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Sgobbi LF, Machado SAS. Functionalized polyacrylamide as an acetylcholinesterase-inspired biomimetic device for electrochemical sensing of organophosphorus pesticides. Biosens Bioelectron 2017; 100:290-297. [PMID: 28942211 DOI: 10.1016/j.bios.2017.09.019] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/12/2017] [Accepted: 09/13/2017] [Indexed: 11/16/2022]
Abstract
A plethora of publications has continuously reported electrochemical biosensors for detection of pesticides. However, those devices rarely accomplish commercial application due to technical issues associated with the lack of stability and high cost of the biological recognition element (enzyme). Alternatively, the biomimetic catalysts have arisen as a candidate for application in electrochemical biosensors to overcome the enzymatic drawbacks, combining low cost scalable materials with superior stability. Herein, for the first time, we propose a biomimetic biosensor for organophosphorus pesticide detection employing a functionalized polyacrylamide, polyhydroxamicalkanoate (PHA), which mimics the performance of the acetylcholinesterase (AChE) enzyme. The PHA bears functional groups inserted along its backbone chain working as active sites. Thereby, PHA was immobilized on screen printed electrodes (SPE) through a blend formation with poly(ethylene glycol) methyl ether (mPEG) to prevent its leaching out from the surface. Under optimum conditions, the biomimetic sensor was employed for the amperometric detection of paraoxon-ethyl, fenitrothion and chlorpyrifos ranging from 1.0 and 10.0μmolL-1 with a limit of detection of 0.36μmolL-1, 0.61μmol L-1, and 0.83μmolL-1, respectively. Typical AChE-based interfering species did not affect the PHA performance, which endorsed its superior behavior. The proposed biomimetic biosensor, denoted as SPE/PHA/mPEG, represents a significant advance in the field, offering a new path for low cost devices by means of an artificial enzyme, simple configuration and superior stability. Moreover, the biosensor performance can be further improved by modifying the electrode surface to enhance electronic transfer rate.
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Affiliation(s)
- Livia F Sgobbi
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, Avenida Trabalhador São-carlense, 400, 13560-970 São Carlos, São Paulo, Brazil.
| | - Sergio A S Machado
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, Avenida Trabalhador São-carlense, 400, 13560-970 São Carlos, São Paulo, Brazil
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Mu M, Yin H, Feng Y. CO 2 -responsive polyacrylamide microspheres with interpenetrating networks. J Colloid Interface Sci 2017; 497:249-257. [DOI: 10.1016/j.jcis.2017.03.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/28/2017] [Accepted: 03/01/2017] [Indexed: 11/27/2022]
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Liang J, Shan G, Pan P. Double network hydrogels with highly enhanced toughness based on a modified first network. SOFT MATTER 2017; 13:4148-4158. [PMID: 28555697 DOI: 10.1039/c7sm00544j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel double network (DN) hydrogel with highly enhanced toughness has been prepared using reversible addition-fragmentation transfer (RAFT)-modified poly(2-acrylamide-2-methylpropane sulfonic acid) (PAMPS) as the first network, and polyacrylamide (PAM) as the second network. The mechanical properties of the first-network-modified PAMPS/PAM DN hydrogels have been studied and the new DN hydrogel shows remarkably high fracture energy (3.3 MJ m-3) in tensile deformation, which is nearly 9 times larger than that of the unmodified PAMPS/PAM DN hydrogel. Synchrotron radiation small-angle X-ray scattering (SAXS) was used to study the microstructures of the first-network single network (SN) and DN hydrogels. It was demonstrated by the SAXS results that the introduction of the RAFT agent into the first network enlarges the size of the ordered cross-linked domains in the SN hydrogel. The large ordered domains are beneficial for entanglement and interpenetration between the first and the second networks to dissipate concentrated stress more efficiently, resulting in the enhanced toughness of the first-network-modified DN hydrogels.
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Affiliation(s)
- Jun Liang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
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Wang L, Shan G, Pan P. Highly enhanced toughness of interpenetrating network hydrogel by incorporating poly(ethylene glycol) in first network. RSC Adv 2014. [DOI: 10.1039/c4ra11494a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Shang K, Shan G, Pan P. Stabilizer-Free Aqueous Two-Phase Copolymerization of Acrylamide and Cationic Monomer: Role of Electrostatic Interactions in the Phase Separation, Colloid Morphology, and Stability. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502388b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kuanxiang Shang
- State Key Laboratory of Chemical
Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guorong Shan
- State Key Laboratory of Chemical
Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Pengju Pan
- State Key Laboratory of Chemical
Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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Takemoto Y, Ajiro H, Akashi M. Amphiphilic Poly(N
-vinyl acetamide) Gels Strengthened with Swelling Solvent. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201300526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yukie Takemoto
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamada-oka Suita, Osaka 565-0871 Japan
| | - Hiroharu Ajiro
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamada-oka Suita, Osaka 565-0871 Japan
- The Center for Advanced Medical Engineering and Informatics; Osaka University; 2-2 Yamada-oka Suita, Osaka 565-0871 Japan
| | - Mitsuru Akashi
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamada-oka Suita, Osaka 565-0871 Japan
- The Center for Advanced Medical Engineering and Informatics; Osaka University; 2-2 Yamada-oka Suita, Osaka 565-0871 Japan
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Macroporous materials from water-in-oil high internal phase emulsion stabilized solely by water-dispersible copolymer particles. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.055] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Morán-Quiroz JL, Orozco-Guareño E, Manríquez R, Carbajal-Arízaga GG, de la Cruz W, Gomez-Salazar S. Polymeric hydrogels obtained using a redox initiator: Application in Cu(II) ions removal from aqueous solutions. J Appl Polym Sci 2013. [DOI: 10.1002/app.39933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- José Luis Morán-Quiroz
- Departamento de Química; Centro Universitario de Ciencias Exactas e Ingenierías; Universidad de Guadalajara; Blvd. Marcelino García Barragán 1451. Guadalajara Jalisco México
| | - Eulogio Orozco-Guareño
- Departamento de Química; Centro Universitario de Ciencias Exactas e Ingenierías; Universidad de Guadalajara; Blvd. Marcelino García Barragán 1451. Guadalajara Jalisco México
| | - Ricardo Manríquez
- Departamento de Madera; Celulosa y Papel, Centro Universitario de Ciencias Exactas e Ingenierías; Universidad de Guadalajara; Km 15.5 Carretera Guadalajara-Nogales Guadalajara Jalisco 45020 México
| | - Gregorio G. Carbajal-Arízaga
- Departamento de Química; Centro Universitario de Ciencias Exactas e Ingenierías; Universidad de Guadalajara; Blvd. Marcelino García Barragán 1451. Guadalajara Jalisco México
| | - Wencel de la Cruz
- Centro de Nanociencias y Nanotecnología; Universidad Nacional Autónoma de México; Km 107 Carretera Tijuana-Ensenada Ensenada Baja California 22830 México
| | - Sergio Gomez-Salazar
- Departamento de Ingeniería Química; Centro Universitario de Ciencias Exactas e Ingenierías; Universidad de Guadalajara; Blvd. Marcelino García Barragán 1451. Guadalajara Jalisco México
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Chen C, Xie X, Li Y, Zhou C, Song Y, Yan Z, Yang X. Influence of different polymers on crystallization tendency and dissolution behavior of cilnidipine in solid dispersions. Drug Dev Ind Pharm 2013; 40:441-51. [DOI: 10.3109/03639045.2013.767825] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Liu Z, Wei Y, Li B, He N. Synthesis of cationic polyacrylamide by aqueous two-phase polymerization in poly(ethylene glycol) chloride solution. J Appl Polym Sci 2012. [DOI: 10.1002/app.37839] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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