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Baidya A, Ghovvati M, Lu C, Naghsh-Nilchi H, Annabi N. Designing a Nitro-Induced Sutured Biomacromolecule to Engineer Electroconductive Adhesive Hydrogels. ACS Appl Mater Interfaces 2022; 14:49483-49494. [PMID: 36286540 DOI: 10.1021/acsami.2c11348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nitro-functionality, with a large deficit of negative charge, embraces biological importance and has proven its therapeutic essence even in chemotherapy. Functionally, with its strong electron-withdrawing capability, nitro can manipulate the electron density of organic moieties and regulates cellular-biochemical reactions. However, the chemistry of nitro-functionality to introduce physiologically relevant macroscopic properties from the molecular skeleton is unknown. Therefore, herein, a neurotransmitter moiety, dopamine, was chemically modified with a nitro-group to explore its influence on synthesizing a multifunctional biomaterial for therapeutic applications. Chemically, while the nitro-group perturbed the aromatic electron density of nitrocatecholic domain, it facilitated the suturing of nitrocatechol moieties to regain its aromaticity through a radical transfer mechanism, forming a novel macromolecular structure. Incorporation of the sutured-nitrocatecholic strand (S-nCAT) in a gelatin-based hydrogel introduced an electroconductive microenvironment through the delocalization of π-electrons in S-nCAT, while maintaining its catechol-mediated adhesive property for tissue repairing/sealing. Meanwhile, the engineered hydrogel enriched with noncovalent interactions, demonstrated excellent mechano-physical properties to support tissue functions. Cytocompatibility of the bioadhesive was assessed with in vitro and in vivo studies, confirming its potential usage for biomedical applications. In conclusion, this novel chemical approach enabled designing a multifunctional biomaterial by manipulating the electronic properties of small bioactive molecules for various biomedical applications.
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Affiliation(s)
- Avijit Baidya
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, California90095, United States
| | - Mahsa Ghovvati
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, California90095, United States
| | - Cathy Lu
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, California90095, United States
| | - Hamed Naghsh-Nilchi
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, California90095, United States
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, California90095, United States
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, California90095, United States
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Tang R, Meng Q, Wang Z, Lu C, Zhang M, Li C, Li Y, Shen X, Sun Q. Multifunctional Ternary Hybrid Hydrogel Sensor Prepared via the Synergistic Stabilization Effect. ACS Appl Mater Interfaces 2021; 13:57725-57734. [PMID: 34814687 DOI: 10.1021/acsami.1c17895] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Since highly stretchable hydrogels have demonstrated their promising applications in flexible tactile sensors and wearable devices, the current challenge has been imposed on stretchable and multifunctional electronics. Here, we report a multifunctional sensor composed of a liquid metal (LM) nanodroplet-adhered self-assembled polymeric network, anionic carboxymethylcellulose (CMC), and cationic polyacrylamide (PAAm). The synergistic effect, zeta potential reduction, by CMC and macromolecules enveloped by LM contributes to the stabilization of the ternary system during preparation and, thus, the homogenization of the products. By engineering and optimizing the ternary hybrid hydrogels, excellent extensibility (tensile strain near 300%), readily reversible hysteresis loops, and accessible deformability (low modulus of 104 Pa) are afforded. The fabricated sensor exhibits a high tensile strain gauge factor of around 0.7 and a high compressive stress sensitivity of up to 0.12 kPa-1, a fast response time below 125 ms, and a high stability and precision in usage. In a series of practical scenarios, the assembled sensor displays distinguished abilities to monitor bodily motions, record electrocardiograms, authenticate handwriting, discern temperature, and infer materials, making them highly promising for multifunctional intelligent soft sensing.
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Affiliation(s)
- Ruixin Tang
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Qingyu Meng
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Zhaosong Wang
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Chengjiang Lu
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Minghao Zhang
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Caicai Li
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Yingying Li
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Xiaoping Shen
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
| | - Qingfeng Sun
- School of Engineering, Zhejiang A&F University, No. 666 Wusu Street, Linan District, Hangzhou, Zhejiang Province 311300, People's Republic of China
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Abstract
Due to their precisely modifiable microporosity and chemical functionality, Metal-Organic Frameworks (MOFs) have revolutionized catalysis, separations, gas storage, drug delivery, and sensors. However, because of their rigid and brittle powder morphology, it is challenging to build customizable MOF shapes with tunable mechanical properties. Here, we describe a new three-dimensional (3D) printing approach to create stretchable and tough MOF hydrogel structures with tunable mechanical properties. We formulate a printable ink by combining prepolymers of a versatile double network (DN) hydrogel of acrylamide and alginate, a shear-thinning agent, and MOF ligands. Importantly, by simultaneous cross-linking of alginate and in situ growth of the HKUST-1 using copper ions, we are able to create composites with high MOF dispersity in the DN hydrogel matrix with high pore accessibility. We extensively characterize the inks and uncover parameters to tune modulus, strength, and toughness of the 3D prints. We also demonstrate the excellent performance of the MOF hydrogels for dye absorption. Our approach incorporates all of the advantageous attributes of 3D printing while offering a rational approach to merge stretchable hydrogels and MOFs, and our findings are of broad relevance to wearables, implantable and flexible sensors, chemical separations, and soft robotics.
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Affiliation(s)
- Wangqu Liu
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Ozan Erol
- Department of Mechanical Engineering and Hopkins Extreme Materials Institute, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - David H Gracias
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
- Department of Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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Seo Y, Kim BS, Ballance WC, Aw N, Sutton B, Kong H. Transparent and Flexible Electronics Assembled with Metallic Nanowire-Layered Nondrying Glycerogel. ACS Appl Mater Interfaces 2020; 12:13040-13050. [PMID: 32072806 DOI: 10.1021/acsami.9b21697] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
There has been increasing demand for transparent and mechanically durable electrical conductors for their uses in wearable electronic devices. It is common to layer metallic nanowires on transparent but stiff poly(dimethylsiloxane) (PDMS) or stretchable but opaque Ecoflex-based substrates. Here, we hypothesized that layering metallic nanowires on a stretchable and hygroscopic gel would allow us to assemble a transparent, stretchable, and durable conductor. The hygroscopic property of the gel was attained by partially replacing water in the preformed polyacrylamide hydrogel with glycerol. The resulting gel, denoted as a glycerogel, could remain hydrated for over 6 months in air by taking up water molecules from the air. The glycerogel was tailored to be stretchable up to 8 times its original length by tuning the amount of the cross-linker and acrylamide. The resulting glycerogel allowed for deposition of wavy silver nanowires using the prestrain method up to 400% prestrain, without causing kinks and interfacial cracks often found with nanowires layered onto PDMS. With a prestrain of 100%, the resulting nanowire-gel conductor exhibited optical transparency (85%) and electrical conductivity (17.1 ohm/sq) even after 5000 cycles of deformation. The results of this study would broadly be useful to improve the performance of the next generation of flexible electronic devices.
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Affiliation(s)
- Yongbeom Seo
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Byoung Soo Kim
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - William C Ballance
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Natalie Aw
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Brad Sutton
- Department of Bioengineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Bioengineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Kunwar P, Jannini AVS, Xiong Z, Ransbottom MJ, Perkins JS, Henderson JH, Hasenwinkel JM, Soman P. High-Resolution 3D Printing of Stretchable Hydrogel Structures Using Optical Projection Lithography. ACS Appl Mater Interfaces 2020; 12:1640-1649. [PMID: 31833757 DOI: 10.1021/acsami.9b19431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Double-network (DN) hydrogels, with their unique combination of mechanical strength and toughness, have emerged as promising materials for soft robotics and tissue engineering. In the past decade, significant effort has been devoted to synthesizing DN hydrogels with high stretchability and toughness; however, shaping the DN hydrogels into complex and often necessary user-defined two-dimensional (2D) and three-dimensional (3D) geometries remains a fabrication challenge. Here, we report a new fabrication method based on optical projection lithography to print DN hydrogels into customizable 2D and 3D structures within minutes. DN hydrogels were printed by first photo-crosslinking a single network structure via spatially modulated light patterns followed by immersing the printed structure in a calcium bath to induce ionic cross-linking. Results show that DN structures made by this method can stretch four times their original lengths. We show that strain and the elastic modulus of printed structures can be tuned based on the hydrogel composition, cross-linker and photoinitiator concentrations, and laser light intensity. To our knowledge, this is the first report demonstrating quick lithography and high-resolution printing of DN (covalent and ionic) hydrogels within minutes. The ability to shape tough and stretchable DN hydrogels in complex structures will be potentially useful in a broad range of applications.
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Affiliation(s)
- Puskal Kunwar
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | | | - Zheng Xiong
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | - Mark James Ransbottom
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | - Jamila Shani Perkins
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | - James H Henderson
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | - Julie M Hasenwinkel
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
| | - Pranav Soman
- Department of Chemical and Bioengineering , Syracuse University , Syracuse , New York 13244 , United States
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Zhu Q, Zhang L, Van Vliet K, Miserez A, Holten-Andersen N. White Light-Emitting Multistimuli-Responsive Hydrogels with Lanthanides and Carbon Dots. ACS Appl Mater Interfaces 2018; 10:10409-10418. [PMID: 29481036 DOI: 10.1021/acsami.7b17016] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Polymers that confer changes in optical properties in response to chemical or mechanical cues offer diverse sensing applications, particularly if this stimuli response is accessible in humid or aqueous environments. In this study, luminescent hydrogels were fabricated using a facile aqueous process by incorporating lanthanide ions and carbon dots (CD) into a network of polyacrylamide and poly(acrylic acid). White luminescence was obtained by tuning the balance of blue-light-emitting CD to green- and red-light-emitting lanthanide ions. Exploiting the combined specific sensitivities of the different emitters, the luminescent hydrogel showed chromic responsiveness to multiple stimuli, including pH, organic vapors, transition-metal ions, and temperature. The white-light-emitting hydrogel was also stretchable with a fracture strain of 400%. We envision this photoluminescent hydrogel to be a versatile and multifunctional material for chemical and environmental sensing.
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Affiliation(s)
- Qingdi Zhu
- BioSystems and Micromechanics Interdisciplinary Research Group , Singapore-MIT Alliance for Research and Technology (SMART) Centre, CREATE , 138602 , Singapore
| | - Lihong Zhang
- Biological & Biomimetic Material Laboratory, School of Materials Science & Engineering , Nanyang Technological University , 637553 , Singapore
| | - Krystyn Van Vliet
- BioSystems and Micromechanics Interdisciplinary Research Group , Singapore-MIT Alliance for Research and Technology (SMART) Centre, CREATE , 138602 , Singapore
| | - Ali Miserez
- Biological & Biomimetic Material Laboratory, School of Materials Science & Engineering , Nanyang Technological University , 637553 , Singapore
- School of Biological Sciences , Nanyang Technological University , 637551 , Singapore
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Deng J, Zhao C, Spatz JP, Wei Q. Nanopatterned Adhesive, Stretchable Hydrogel to Control Ligand Spacing and Regulate Cell Spreading and Migration. ACS Nano 2017; 11:8282-8291. [PMID: 28696653 DOI: 10.1021/acsnano.7b03449] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Spatial molecular patterning enables the regulation of adhesion receptor clustering and can thus play a pivotal role in multiple biological activities such as cell adhesion, viability, proliferation, and differentiation. A wide range of nanopatterned, adhesive interfaces have been designed to decipher the essence of molecular-scale interactions between cells and the adhesive interface. Although an interligand spacing of less than 70 nm is a proven prerequisite for the formation of stable focal adhesions, there is a paucity of data concerning how cells behave on substrates featuring heterogeneous adhesiveness. In this study, a stretchable hydrogel functionalized with a quasi-hexagonally arranged nanoarray was stretched along one direction, resulting in ligands periodically arranged in a pattern resembling a centered rectangular lattice with an interligand spacing smaller than 70 nm in one direction and greater than 70 nm in the orthogonal direction. This substrate was utilized to modulate interligand spacing and investigate cell adhesion and migration. An interligand spacing larger than 70 nm-even in just one direction-prevented the establishment of stable focal adhesions. The stretched interface promoted dynamic remodeling at cell contacts, resulting in higher cellular mobility. Our nanopatterned stretchable hydrogel permits reversible control over cell adhesion and migration on nanopatterned ligand interfaces.
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Affiliation(s)
- Jie Deng
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg, and Laboratory of Biophysical Chemistry, University of Heidelberg , Jahnstraße 29, 69120 Heidelberg, Germany
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering, Sichuan University , Chengdu 610065, China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering, Sichuan University , Chengdu 610065, China
| | - Joachim P Spatz
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg, and Laboratory of Biophysical Chemistry, University of Heidelberg , Jahnstraße 29, 69120 Heidelberg, Germany
| | - Qiang Wei
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg, and Laboratory of Biophysical Chemistry, University of Heidelberg , Jahnstraße 29, 69120 Heidelberg, Germany
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