1
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Read H, Benaglia S, Fumagalli L. Structure and thermodynamics of supported lipid membranes on hydrophobic van der Waals surfaces. SOFT MATTER 2024. [PMID: 38979701 DOI: 10.1039/d4sm00365a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Understanding the adsorption and physical characteristics of supported lipid membranes is crucial for their effective use as model cell membranes. Their morphological and thermodynamic properties at the nanoscale have traditionally been studied on hydrophilic substrates, such as mica and silicon oxide, which have proved to facilitate the reconstruction of biomembranes. However, in more recent years, with the advent of the van der Waals crystals technology, two-dimensional crystals such as graphene have been proposed as potential substrates in biosensing devices. Membranes formed on these crystals are expected to behave differently owing to their intrinsic hydrophobicity, however thus far knowledge of their morphological and thermodynamic properties is lacking. Here we present a comprehensive nanoscale analysis of the adsorption of phosphatidylcholine lipid monolayers on two of the most commonly used van der Waals crystals, graphite and hexagonal boron nitride. Both morphological and thermodynamic properties of the lipid membranes were investigated using temperature-controlled atomic force microscopy. Our experiments show that the lipids adsorb onto the crystals, forming monolayers with their orientation dependent upon their concentration. Furthermore, we found that the hydrophobicity of van der Waals crystals determines a strong increase in the transition temperature of the lipid monolayer compared to that observed on hydrophilic substrates. These results are important for understanding the properties of lipid membranes at solid surfaces and extending their use to novel drug delivery and biosensing devices made of van der Waals crystals.
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Affiliation(s)
- Harriet Read
- Department of Physics & Astronomy University of Manchester, Manchester, M13 9PL, UK.
- National Graphene Institute, University of Manchester, Manchester, M13 9PL, UK
| | - Simone Benaglia
- Department of Physics & Astronomy University of Manchester, Manchester, M13 9PL, UK.
- National Graphene Institute, University of Manchester, Manchester, M13 9PL, UK
| | - Laura Fumagalli
- Department of Physics & Astronomy University of Manchester, Manchester, M13 9PL, UK.
- National Graphene Institute, University of Manchester, Manchester, M13 9PL, UK
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2
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Arita K, Yarimizu S, Moriguchi M, Inoue T, Asahara H. Synthesis of Zwitterionic Phospholipid-Connected Silane Coupling Agents and Their Hybridization with Graphene Oxide. J Oleo Sci 2024; 73:857-863. [PMID: 38825539 DOI: 10.5650/jos.ess24044] [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] [Indexed: 06/04/2024] Open
Abstract
The hybridization of lipids with graphene is expected to produce a promising, novel biomaterial. However, there are limited examples of the covalent introduction of lipid molecules, especially the immobilization of lipid molecules, onto graphene on a substrate. Therefore, we investigated the hybridization of a silane coupling agent having phospholipid moieties with graphene oxide on substrates prepared by photo-oxidation using chlorine dioxide. Three silane coupling agents with different carbon chain lengths (C4, C6, C8) were synthesized and phospholipid molecules were introduced onto graphene on a substrate. Phospholipid-immobilized graphene on a grid for TEM (transmission electron microscope) was used for EM analysis of proteins (glyceraldehyde 3-phosphate dehydrogenase and β-galactosidase), enabling the observation of sufficient particles compared to the conventional graphene grid.
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Affiliation(s)
- Kanato Arita
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Seina Yarimizu
- Graduate School of Pharmaceutical Sciences, Osaka University
| | - Maiko Moriguchi
- Department of Biophysical Chemistry School of Pharmaceutical Science, Wakayama Medical University
| | - Tsuyoshi Inoue
- Graduate School of Pharmaceutical Sciences, Osaka University
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University
| | - Haruyasu Asahara
- Graduate School of Pharmaceutical Sciences, Osaka University
- Institute for Open and Transdisciplinary Research Initiatives, Osaka University
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3
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Fukunaga Y, Zandieh M, Liu Y, Liu J. Salt-Induced Adsorption and Rupture of Liposomes on Microplastics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16395-16403. [PMID: 37934056 DOI: 10.1021/acs.langmuir.3c02160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Microplastics have attracted considerable attention because of concerns regarding their environmental risks to living systems. The interaction between the lipid bilayer and microplastics is important for examining the potential harm to biological membranes in the presence of microplastics. In addition, membrane coatings may change the surface and colloidal properties of microplastics. Herein, phosphatidylcholine (PC) lipids, whose headgroup is most common in cell membranes, were used as model lipids. The adsorption and rupture of PC liposomes on microplastics were systematically studied. We found that divalent metal ions, such as Mg2+ and Ca2+, facilitate liposome adsorption onto microplastics and induce 40-55% liposome leakage at 2.5 mM. In contrast, to achieve a similar effect, 300 mM Na+ was required. Adsorption and rupture followed the same metal concentration requirements, suggesting that liposome adsorption was the rate-limiting step. After adsorption with liposomes, microplastics became more hydrophilic and were better dispersed in water. A similar behavior was observed for all five types of tested microplastics, including PP, PE, PVC, PET, and PS. Leakage also occurred in ocean water. This study provides fundamental insights into the interactions between liposomes and microplastics and has implications for the colloidal and transport properties of microplastics.
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Affiliation(s)
- Yu Fukunaga
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Mohamad Zandieh
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Yibo Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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4
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Yang C, He X, Wang H, Lin Z, Hou W, Lu Y, Hu S, Li M. Single-Molecule Monitoring of Membrane Association of the Necroptosis Executioner MLKL with Discernible Anchoring and Insertion Dynamics. NANO LETTERS 2023. [PMID: 37191260 DOI: 10.1021/acs.nanolett.2c05062] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The dynamics of membrane proteins that are well-folded in water and become functional after self-insertion into cell membranes is not well understood. Herein we report on single-molecule monitoring of membrane association dynamics of the necroptosis executioner MLKL. We observed that, upon landing, the N-terminal region (NTR) of MLKL anchors onto the surface with an oblique angle and then is immersed in the membrane. The anchoring end does not insert into the membrane, but the opposite end does. The protein is not static, switching slowly between water-exposed and membrane-embedded conformations. The results suggest a mechanism for the activation and function of MLKL in which exposure of H4 is critical for MLKL to adsorb on the membrane, and the brace helix H6 regulates MLKL rather than inhibits it. Our findings provide deeper insights into membrane association and function regulation of MLKL and would have impacts on biotechnological applications.
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Affiliation(s)
- Chenguang Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaolong He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhao Lin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenqing Hou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Lu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Shuxin Hu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ming Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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5
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Manzer ZA, Ghosh S, Roy A, Jacobs ML, Carten J, Kamat NP, Daniel S. Cell-Free Synthesis Goes Electric: Dual Optical and Electronic Biosensor via Direct Channel Integration into a Supported Membrane Electrode. ACS Synth Biol 2023; 12:502-510. [PMID: 36651574 DOI: 10.1021/acssynbio.2c00531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Assembling transmembrane proteins on organic electronic materials is one promising approach to couple biological functions to electrical readouts. A biosensing device produced in such a way would enable both the monitoring and regulation of physiological processes and the development of new analytical tools to identify drug targets and new protein functionalities. While transmembrane proteins can be interfaced with bioelectronics through supported lipid bilayers (SLBs), incorporating functional and oriented transmembrane proteins into these structures remains challenging. Here, we demonstrate that cell-free expression systems allow for the one-step integration of an ion channel into SLBs assembled on an organic conducting polymer, poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS). Using the large conductance mechanosensitive channel (MscL) as a model ion channel, we demonstrate that MscL adopts the correct orientation, remains mobile in the SLB, and is active on the polyelectrolyte surface using optical and electrical readouts. This work serves as an important illustration of a rapidly assembled bioelectronic platform with a diverse array of downstream applications, including electrochemical sensing, physiological regulation, and screening of transmembrane protein modulators.
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Affiliation(s)
- Zachary A Manzer
- R.F. School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Surajit Ghosh
- R.F. School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Arpita Roy
- R.F. School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Miranda L Jacobs
- Department of Biomedical Engineering and Interdisciplinary Biological Sciences Program, Northwestern University, Evanston, Illinois 60208, United States
| | - Juliana Carten
- R.F. School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Neha P Kamat
- Department of Biomedical Engineering, Center for Synthetic Biology, Northwestern University, Evanston, Illinois 60208, United States
| | - Susan Daniel
- R.F. School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
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6
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Bespalova M, Öz R, Westerlund F, Krishnan M. Single-Molecule Trapping and Measurement in a Nanostructured Lipid Bilayer System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13923-13934. [PMID: 36326814 PMCID: PMC9671048 DOI: 10.1021/acs.langmuir.2c02203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/15/2022] [Indexed: 06/16/2023]
Abstract
The repulsive electrostatic force between a biomolecule and a like-charged surface can be geometrically tailored to create spatial traps for charged molecules in solution. Using a parallel-plate system composed of silicon dioxide surfaces, we recently demonstrated single-molecule trapping and high precision molecular charge measurements in a nanostructured free energy landscape. Here we show that surfaces coated with charged lipid bilayers provide a system with tunable surface properties for molecular electrometry experiments. Working with molecular species whose effective charge and geometry are well-defined, we demonstrate the ability to quantitatively probe the electrical charge density of a supported lipid bilayer. Our findings indicate that the fraction of charged lipids in nanoslit lipid bilayers can be significantly different from that in the precursor lipid mixtures used to generate them. We also explore the temporal stability of bilayer properties in nanofluidic systems. Beyond their relevance in molecular measurement, such experimental systems offer the opportunity to examine lipid bilayer formation and wetting dynamics on nanostructured surfaces.
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Affiliation(s)
- Maria Bespalova
- Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, OxfordOX1 3QZ, United Kingdom
| | - Robin Öz
- Department
of Biology and Biological Engineering, Chalmers
University of Technology, 412 96Gothenburg, Sweden
| | - Fredrik Westerlund
- Department
of Biology and Biological Engineering, Chalmers
University of Technology, 412 96Gothenburg, Sweden
| | - Madhavi Krishnan
- Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, OxfordOX1 3QZ, United Kingdom
- The
Kavli Institute for Nanoscience Discovery, Sherrington Road, OxfordOX1 3QU, United Kingdom
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7
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Dronadula MT, Aluru NR. Phospholipid Monolayer/Graphene Interfaces: Curvature Effect on Lipid Morphology and Dynamics. J Phys Chem B 2022; 126:6261-6270. [PMID: 35951540 DOI: 10.1021/acs.jpcb.2c00896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phospholipids are an important class of lipids that are widely used as model platforms for the study of biological processes and interactions. These lipids can form stable interfaces with solid substrates, such as graphene, and these interfaces have potential applications in biosensing and targeted drug delivery. In this paper, we perform molecular dynamics simulations of graphene-supported lipid monolayers to characterize the lipid properties of such interfaces. We observed substantial differences between the supported monolayer and free-standing bilayer in terms of the lipid properties, such as the tail order parameters, density profiles, diffusion rates, and so on. Furthermore, we studied these interfaces on sinusoidally deformed graphene substrates to understand the effect of curvature on the supported lipids. Here, we observed that the nature of the substrate curvature, that is, concave or convex, can locally affect the lipid/substrate adhesion strength and induce structural and dynamic changes in the adsorbed lipid monolayer. Together, these results help characterize the properties of lipid/graphene interfaces and provide insights into the substrate curvature effect on these interfaces, which can enable the tuning of lipid properties for various sensor devices and drug delivery applications.
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Affiliation(s)
- Mohan Teja Dronadula
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - N R Aluru
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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8
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Zhou F, Pan W, Chang Y, Su X, Duan X, Xue Q. A Supported Lipid Bilayer-Based Lab-on-a-Chip Biosensor for the Rapid Electrical Screening of Coronavirus Drugs. ACS Sens 2022; 7:2084-2092. [PMID: 35735978 PMCID: PMC9236208 DOI: 10.1021/acssensors.2c00970] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/15/2022] [Indexed: 01/06/2023]
Abstract
With the rapid spread and multigeneration variation of coronavirus, rapid drug development has become imperative. A major obstacle to addressing this issue is adequately constructing the cell membrane at the molecular level, which enables in vitro observation of the cell response to virus and drug molecules quantitatively, shortening the drug experiment cycle. Herein, we propose a rapid and label-free supported lipid bilayer-based lab-on-a-chip biosensor for the screening of effective inhibition drugs. An extended gate electrode was prepared and functionalized by an angiotensin-converting enzyme II (ACE2) receptor-incorporated supported lipid bilayer (SLB). Such an integrated system can convert the interactions of targets and membrane receptors into real-time charge signals. The platform can simulate the cell membrane microenvironment in vitro and accurately capture the interaction signal between the target and the cell membrane with minimized interference, thus observing the drug action pathway quantitatively and realizing drug screening effectively. Due to these label-free, low-cost, convenient, and integrated advantages, it is a suitable candidate method for the rapid drug screening for the early treatment and prevention of worldwide spread of coronavirus.
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Affiliation(s)
- Feng Zhou
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Wenwei Pan
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Ye Chang
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Xueyou Su
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Xuexin Duan
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Qiannan Xue
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
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9
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Kumar S, Pratap S, Kumar V, Mishra RK, Gwag JS, Chakraborty B. Electronic, transport, magnetic and optical properties of graphene nanoribbons review. LUMINESCENCE 2022. [PMID: 35850156 DOI: 10.1002/bio.4334] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/03/2022] [Accepted: 06/14/2022] [Indexed: 11/08/2022]
Abstract
Low dimensional materials have attracted great research interest from both theoretical and experimental point of view. These materials exhibit novel physical and chemical properties due to the confinement effect in low dimensions. The experimental observations of graphene open a new platform to study the physical properties of materials restricted to two dimensions. This featured article provides a review on the novel properties of quasi one-dimensional (1D) material known as graphene nanoribbon. Graphene nanoribbons can be obtained by unzipping carbon nanotubes (CNTs) or cutting the graphene sheet. Alternatively, it is also called the finite termination of graphene edges. It gives rise different edge geometries namely zigzag and armchair among others. There are various physical and chemical techniques to realize these materials. Depending on the edge type termination, these are called the zigzag and armchair graphene nanoribbons (ZGNR and AGNR). These edges play an important role in controlling the properties of graphene nanoribbons. The present review article provides an overview of the electronic, transport, optical and magnetic properties of graphene nanoribbons. However, there are different ways to tune these properties for device applications. Here, some of them are highlighted such as external perturbations and chemical modifications. Few applications of graphene nanoribbon have and chemical modifications. Few applications of graphene nanoribbon have also been briefly discussed.
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Affiliation(s)
- Sandeep Kumar
- Department of Physics and astronomical Science, Central University of Himachal Pradesh, Kangra, H.P, India
| | - Surender Pratap
- Department of Physics and astronomical Science, Central University of Himachal Pradesh, Kangra, H.P, India
| | - Vipin Kumar
- Department of Physics, Yeungnam University, Gyeongsan, South Korea
| | | | - Jin Seog Gwag
- Department of Physics, Yeungnam University, Gyeongsan, South Korea
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10
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Sofińska K, Lupa D, Chachaj-Brekiesz A, Czaja M, Kobierski J, Seweryn S, Skirlińska-Nosek K, Szymonski M, Wilkosz N, Wnętrzak A, Lipiec E. Revealing local molecular distribution, orientation, phase separation, and formation of domains in artificial lipid layers: Towards comprehensive characterization of biological membranes. Adv Colloid Interface Sci 2022; 301:102614. [PMID: 35190313 DOI: 10.1016/j.cis.2022.102614] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/28/2022] [Accepted: 02/01/2022] [Indexed: 01/01/2023]
Abstract
Lipids, together with molecules such as DNA and proteins, are one of the most relevant systems responsible for the existence of life. Selected lipids are able to assembly into various organized structures, such as lipid membranes. The unique properties of lipid membranes determine their complex functions, not only to separate biological environments, but also to participate in regulatory functions, absorption of nutrients, cell-cell communication, endocytosis, cell signaling, and many others. Despite numerous scientific efforts, still little is known about the reason underlying the variability within lipid membranes, and its biochemical significance. In this review, we discuss the structural complexity of lipid membranes, as well as the importance to simplify studied systems in order to understand phenomena occurring in natural, complex membranes. Such systems require a model interface to be analyzed. Therefore, here we focused on analytical studies of artificial systems at various interfaces. The molecular structure of lipid membranes, specifically the nanometric thickens of molecular bilayer, limits in a major extent the choice of highly sensitive methods suitable to study such structures. Therefore, we focused on methods that combine high sensitivity, and/or chemical selectivity, and/or nanometric spatial resolution, such as atomic force microscopy, nanospectroscopy (tip-enhanced Raman spectroscopy, infrared nanospectroscopy), phase modulation infrared reflection-absorption spectroscopy, sum-frequency generation spectroscopy. We summarized experimental and theoretical approaches providing information about molecular structure and composition, lipid spatial distribution (phase separation), organization (domain shape, molecular orientation) of lipid membranes, and real-time visualization of the influence of various molecules (proteins, drugs) on their integrity. An integral part of this review discusses the latest achievements in the field of lipid layer-based biosensors.
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11
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Lu HW, Kane AA, Parkinson J, Gao Y, Hajian R, Heltzen M, Goldsmith B, Aran K. The promise of graphene-based transistors for democratizing multiomics studies. Biosens Bioelectron 2022; 195:113605. [PMID: 34537553 DOI: 10.1016/j.bios.2021.113605] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/22/2021] [Accepted: 08/29/2021] [Indexed: 12/28/2022]
Abstract
As biological research has synthesized genomics, proteomics, metabolomics, and transcriptomics into systems biology, a new multiomics approach to biological research has emerged. Today, multiomics studies are challenging and expensive. An experimental platform that could unify the multiple omics approaches to measurement could increase access to multiomics data by enabling more individual labs to successfully attempt multiomics studies. Field effect biosensing based on graphene transistors have gained significant attention as a potential unifying technology for such multiomics studies. This review article highlights the outstanding performance characteristics that makes graphene field effect transistor an attractive sensing platform for a wide variety of analytes important to system biology. In addition to many studies demonstrating the biosensing capabilities of graphene field effect transistors, they are uniquely suited to address the challenges of multiomics studies by providing an integrative multiplex platform for large scale manufacturing using the well-established processes of semiconductor industry. Furthermore, the resulting digital data is readily analyzable by machine learning to derive actionable biological insight to address the challenge of data compatibility for multiomics studies. A critical stage of systems biology will be democratizing multiomics study, and the graphene field effect transistor is uniquely positioned to serve as an accessible multiomics platform.
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Affiliation(s)
- Hsiang-Wei Lu
- Keck Graduate Institute, The Claremont Colleges, Claremont, CA, 91711, USA; Cardea Bio, San Diego, CA, 92121, USA
| | | | | | | | - Reza Hajian
- Keck Graduate Institute, The Claremont Colleges, Claremont, CA, 91711, USA; Cardea Bio, San Diego, CA, 92121, USA
| | | | | | - Kiana Aran
- Keck Graduate Institute, The Claremont Colleges, Claremont, CA, 91711, USA; Cardea Bio, San Diego, CA, 92121, USA.
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12
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Huang H, Feng W, Chen Y. Two-dimensional biomaterials: material science, biological effect and biomedical engineering applications. Chem Soc Rev 2021; 50:11381-11485. [PMID: 34661206 DOI: 10.1039/d0cs01138j] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To date, nanotechnology has increasingly been identified as a promising and efficient means to address a number of challenges associated with public health. In the past decade, two-dimensional (2D) biomaterials, as a unique nanoplatform with planar topology, have attracted explosive interest in various fields such as biomedicine due to their unique morphology, physicochemical properties and biological effect. Motivated by the progress of graphene in biomedicine, dozens of types of ultrathin 2D biomaterials have found versatile bio-applications, including biosensing, biomedical imaging, delivery of therapeutic agents, cancer theranostics, tissue engineering, as well as others. The effective utilization of 2D biomaterials stems from the in-depth knowledge of structure-property-bioactivity-biosafety-application-performance relationships. A comprehensive summary of 2D biomaterials for biomedicine is still lacking. In this comprehensive review, we aim to concentrate on the state-of-the-art 2D biomaterials with a particular focus on their versatile biomedical applications. In particular, we discuss the design, fabrication and functionalization of 2D biomaterials used for diverse biomedical applications based on the up-to-date progress. Furthermore, the interactions between 2D biomaterials and biological systems on the spatial-temporal scale are highlighted, which will deepen the understanding of the underlying action mechanism of 2D biomaterials aiding their design with improved functionalities. Finally, taking the bench-to-bedside as a focus, we conclude this review by proposing the current crucial issues/challenges and presenting the future development directions to advance the clinical translation of these emerging 2D biomaterials.
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Affiliation(s)
- Hui Huang
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China
| | - Wei Feng
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China.,Wenzhou Institute of Shanghai University, Wenzhou, 325000, P. R. China.,School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
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13
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Bapli A, Jana R, Pandit S, Seth D. Selective prototropism of lumichrome in the liposome/graphene oxide interface: A detailed spectroscopic study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Savenko M, Rivel T, Yesylevskyy S, Ramseyer C. Influence of Substrate Hydrophilicity on Structural Properties of Supported Lipid Systems on Graphene, Graphene Oxides, and Silica. J Phys Chem B 2021; 125:8060-8074. [PMID: 34284579 DOI: 10.1021/acs.jpcb.1c04615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pristine graphene, a range of graphene oxides, and silica substrates were used to investigate the effect of surface hydrophilicity on supported lipid bilayers by means of all-atom molecular dynamics simulations. Supported 1,2-dioleoyl-sn-glycero-3-phosphocholine lipid bilayers were found in close-contact conformations with hydrophilic substrates with as low as 5% oxidation level, while self-assembled monolayers occur on pure hydrophobic graphene only. Lipids and water at the surface undergo large redistribution to maintain the stability of the supported bilayers. Deposition of bicelles on increasingly hydrophilic substrates shows the continuous process of reshaping of the supported system and makes intermediate stages between self-assembled monolayers and supported bilayers. The bilayer thickness changes with hydrophilicity in a complex manner, while the number of water molecules per lipid in the hydration layer increases together with hydrophilicity.
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Affiliation(s)
- Mariia Savenko
- Laboratoire Chrono Environnement UMR CNRS 6249, Université de Bourgogne Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France
| | - Timothée Rivel
- Laboratoire Chrono Environnement UMR CNRS 6249, Université de Bourgogne Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France.,CEITEC - Central European Institute of Technology, Masaryk University, Kamenice, CZ-62500 Brno, Czech Republic.,National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice, CZ-62500 Brno, Czech Republic
| | - Semen Yesylevskyy
- Laboratoire Chrono Environnement UMR CNRS 6249, Université de Bourgogne Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France.,Department of Physics of Biological Systems, Institute of Physics of the National Academy of Sciences of Ukraine, Prospect Nauky 46, 03028 Kyiv, Ukraine
| | - Christophe Ramseyer
- Laboratoire Chrono Environnement UMR CNRS 6249, Université de Bourgogne Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France
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15
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Lee D, Jung WH, Lee S, Yu ES, Lee T, Kim JH, Song HS, Lee KH, Lee S, Han SK, Choi MC, Ahn DJ, Ryu YS, Kim C. Ionic contrast across a lipid membrane for Debye length extension: towards an ultimate bioelectronic transducer. Nat Commun 2021; 12:3741. [PMID: 34145296 PMCID: PMC8213817 DOI: 10.1038/s41467-021-24122-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 06/03/2021] [Indexed: 11/09/2022] Open
Abstract
Despite technological advances in biomolecule detections, evaluation of molecular interactions via potentiometric devices under ion-enriched solutions has remained a long-standing problem. To avoid severe performance degradation of bioelectronics by ionic screening effects, we cover probe surfaces of field effect transistors with a single film of the supported lipid bilayer, and realize respectable potentiometric signals from receptor-ligand bindings irrespective of ionic strength of bulky solutions by placing an ion-free water layer underneath the supported lipid bilayer. High-energy X-ray reflectometry together with the circuit analysis and molecular dynamics simulation discovered biochemical findings that effective electrical signals dominantly originated from the sub-nanoscale conformational change of lipids in the course of receptor-ligand bindings. Beyond thorough analysis on the underlying mechanism at the molecular level, the proposed supported lipid bilayer-field effect transistor platform ensures the world-record level of sensitivity in molecular detection with excellent reproducibility regardless of molecular charges and environmental ionic conditions.
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Affiliation(s)
- Donggeun Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea.,Department of Electrical & Electronic Engineering, Yonsei University, Seoul, Republic of Korea
| | - Woo Hyuk Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Suho Lee
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Eui-Sang Yu
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Taikjin Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Jae Hun Kim
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Hyun Seok Song
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Kwan Hyi Lee
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, Republic of Korea.,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea
| | - Seok Lee
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Sang-Kook Han
- Department of Electrical & Electronic Engineering, Yonsei University, Seoul, Republic of Korea
| | - Myung Chul Choi
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Dong June Ahn
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea. .,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea.
| | - Yong-Sang Ryu
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea. .,KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, Republic of Korea.
| | - Chulki Kim
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea.
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16
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Zheng K, Li S, Chen Z, Chen Y, Hong Y, Lan W. Highly stable graphene oxide composite nanofiltration membrane. NANOSCALE 2021; 13:10061-10066. [PMID: 34042916 DOI: 10.1039/d1nr01823j] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Graphene oxide (GO) based membranes are promising for advanced nanofiltration in water treatments but there is a need to improve water flux and membrane stability. Although the interlayer distance of GO membranes can be expanded using intercalants to improve permeability, achieving uniform intercalation without the added complication of water-induced swelling is challenging. Herein, we report the fabrication of GO hybrid lamellar membranes with controllable layer structures to achieve high performance in nanofiltration. The interlayer spacing of the GO hybrid membrane is regulated using TiO2 intercalants of different sizes, while the stability of GO membranes is enhanced by encapsulating with polyethyleneimine (PEI). The optimal composite membrane delivers a pure water-flux up to 26.0 L m-2 h-1 bar-1 with a 99.9% rejection of methylene blue and eosin under an ultra-low pressure nanofiltration condition. More importantly, the composite membrane sustains good cycling stability after 5 filtration cycles of dye, which enables the potential industrial application in realizing ultra-stable GO based membranes.
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Affiliation(s)
- Kaiqiang Zheng
- Xiamen University Center for Membrane Application and Advancement, College of Materials, Xiamen University, Xiamen 361005, Fujian, China.
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17
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Menaa F, Fatemeh Y, Vashist SK, Iqbal H, Sharts ON, Menaa B. Graphene, an Interesting Nanocarbon Allotrope for Biosensing Applications: Advances, Insights, and Prospects. Biomed Eng Comput Biol 2021; 12:1179597220983821. [PMID: 33716517 PMCID: PMC7917420 DOI: 10.1177/1179597220983821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 12/07/2020] [Indexed: 12/27/2022] Open
Abstract
Graphene, a relatively new two-dimensional (2D) nanomaterial, possesses unique structure (e.g. lighter, harder, and more flexible than steel) and tunable physicochemical (e.g. electronical, optical) properties with potentially wide eco-friendly and cost-effective usage in biosensing. Furthermore, graphene-related nanomaterials (e.g. graphene oxide, doped graphene, carbon nanotubes) have inculcated tremendous interest among scientists and industrials for the development of innovative biosensing platforms, such as arrays, sequencers and other nanooptical/biophotonic sensing systems (e.g. FET, FRET, CRET, GERS). Indeed, combinatorial functionalization approaches are constantly improving the overall properties of graphene, such as its sensitivity, stability, specificity, selectivity, and response for potential bioanalytical applications. These include real-time multiplex detection, tracking, qualitative, and quantitative characterization of molecules (i.e. analytes [H2O2, urea, nitrite, ATP or NADH]; ions [Hg2+, Pb2+, or Cu2+]; biomolecules (DNA, iRNA, peptides, proteins, vitamins or glucose; disease biomarkers such as genetic alterations in BRCA1, p53) and cells (cancer cells, stem cells, bacteria, or viruses). However, there is still a paucity of comparative reports that critically evaluate the relative toxicity of carbon nanoallotropes in humans. This manuscript comprehensively reviews the biosensing applications of graphene and its derivatives (i.e. GO and rGO). Prospects and challenges are also introduced.
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Affiliation(s)
- Farid Menaa
- Department of Nanomedicine and Fluoro-Carbon Spectroscopy, Fluorotronics, Inc and California Innovations Corporation, San Diego, CA, USA
| | - Yazdian Fatemeh
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Sandeep K Vashist
- Hahn-Schickard-Gesellschaft für Angewandte Forschung e.V. (HSG-IMIT), Freiburg, Germany.,College of Pharmaceutical Sciences, Soochow University, Suzhou, P.R. China
| | - Haroon Iqbal
- College of Pharmaceutical Sciences, Soochow University, Suzhou, P.R. China
| | - Olga N Sharts
- Department of Nanomedicine and Fluoro-Carbon Spectroscopy, Fluorotronics, Inc and California Innovations Corporation, San Diego, CA, USA
| | - Bouzid Menaa
- Department of Nanomedicine and Fluoro-Carbon Spectroscopy, Fluorotronics, Inc and California Innovations Corporation, San Diego, CA, USA
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18
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Zhang X, Mariano CF, Ando Y, Shen K. Bioengineering tools for probing intracellular events in T lymphocytes. WIREs Mech Dis 2020; 13:e1510. [PMID: 33073545 DOI: 10.1002/wsbm.1510] [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: 07/16/2020] [Revised: 09/14/2020] [Accepted: 09/16/2020] [Indexed: 11/11/2022]
Abstract
T lymphocytes are the central coordinator and executor of many immune functions. The activation and function of T lymphocytes are mediated through the engagement of cell surface receptors and regulated by a myriad of intracellular signaling network. Bioengineering tools, including imaging modalities and fluorescent probes, have been developed and employed to elucidate the cellular events throughout the functional lifespan of T cells. A better understanding of these events can broaden our knowledge in the immune systems biology, as well as accelerate the development of effective diagnostics and immunotherapies. Here we review the commonly used and recently developed techniques and probes for monitoring T lymphocyte intracellular events, following the order of intracellular events in T cells from activation, signaling, metabolism to apoptosis. The techniques introduced here can be broadly applied to other immune cells and cell systems. This article is categorized under: Immune System Diseases > Molecular and Cellular Physiology Immune System Diseases > Biomedical Engineering Infectious Diseases > Biomedical Engineering.
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Affiliation(s)
- Xinyuan Zhang
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Chelsea F Mariano
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Yuta Ando
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA
| | - Keyue Shen
- Department of Biomedical Engineering, University of Southern California, Los Angeles, California, USA.,Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, USA.,USC Stem Cell, University of Southern California, Los Angeles, California, USA
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19
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Sankaran J, Wohland T. Fluorescence strategies for mapping cell membrane dynamics and structures. APL Bioeng 2020; 4:020901. [PMID: 32478279 PMCID: PMC7228782 DOI: 10.1063/1.5143945] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 04/17/2020] [Indexed: 12/20/2022] Open
Abstract
Fluorescence spectroscopy has been a cornerstone of research in membrane dynamics and organization. Technological advances in fluorescence spectroscopy went hand in hand with discovery of various physicochemical properties of membranes at nanometric spatial and microsecond timescales. In this perspective, we discuss the various challenges associated with quantification of physicochemical properties of membranes and how various modes of fluorescence spectroscopy have overcome these challenges to shed light on the structure and organization of membranes. Finally, we discuss newer measurement strategies and data analysis tools to investigate the structure, dynamics, and organization of membranes.
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20
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Kim M, Porras-Gomez M, Leal C. Graphene-based sensing of oxygen transport through pulmonary membranes. Nat Commun 2020; 11:1103. [PMID: 32107376 PMCID: PMC7046670 DOI: 10.1038/s41467-020-14825-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 02/04/2020] [Indexed: 11/09/2022] Open
Abstract
Lipid-protein complexes are the basis of pulmonary surfactants covering the respiratory surface and mediating gas exchange in lungs. Cardiolipin is a mitochondrial lipid overexpressed in mammalian lungs infected by bacterial pneumonia. In addition, increased oxygen supply (hyperoxia) is a pathological factor also critical in bacterial pneumonia. In this paper we fabricate a micrometer-size graphene-based sensor to measure oxygen permeation through pulmonary membranes. Combining oxygen sensing, X-ray scattering, and Atomic Force Microscopy, we show that mammalian pulmonary membranes suffer a structural transformation induced by cardiolipin. We observe that cardiolipin promotes the formation of periodic protein-free inter-membrane contacts with rhombohedral symmetry. Membrane contacts, or stalks, promote a significant increase in oxygen gas permeation which may bear significance for alveoli gas exchange imbalance in pneumonia.
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Affiliation(s)
- Mijung Kim
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Marilyn Porras-Gomez
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Cecilia Leal
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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21
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Vasconcelos JM, Zen F, Angione MD, Cullen RJ, Santos-Martinez MJ, Colavita PE. Understanding the Carbon–Bio Interface: Influence of Surface Chemistry and Buffer Composition on the Adsorption of Phospholipid Liposomes at Carbon Surfaces. ACS APPLIED BIO MATERIALS 2020; 3:997-1007. [DOI: 10.1021/acsabm.9b01011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Federico Zen
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland
| | | | - Ronan J. Cullen
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland
| | - Maria J. Santos-Martinez
- School of Pharmacy and Pharmaceutical Sciences, School of Medicine and Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
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22
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Park Y, Kang B, Ahn CH, Cho HK, Kwon H, Park S, Kwon J, Choi M, Lee C, Kim K. Bionanoelectronic platform with a lipid bilayer/CVD-grown MoS2 hybrid. Biosens Bioelectron 2019; 142:111512. [DOI: 10.1016/j.bios.2019.111512] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/20/2019] [Accepted: 07/12/2019] [Indexed: 12/21/2022]
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23
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Cryptosporidium parvum oocyst directed assembly of gold nanoparticles and graphene oxide. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1813-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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24
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Hu SK, Lo FY, Hsieh CC, Chao L. Sensing Ability and Formation Criterion of Fluid Supported Lipid Bilayer Coated Graphene Field-Effect Transistors. ACS Sens 2019; 4:892-899. [PMID: 30817891 DOI: 10.1021/acssensors.8b01623] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Supported lipid bilayers (SLBs) have been widely used to provide native environments for membrane protein studies. In this study, we utilized graphene field-effect transistors (GFETs) coated with a fluid SLB to perform label-free detection of membrane-associated ligand-receptor interactions in their native lipid bilayer environment. It is known that the analyte-binding event needs to occur within the Debye length for it to be significantly sensed by an FET sensor. However, the thickness of a lipid bilayer is around 4-5-nm-thick, which is larger than the Debye length of a solution with physiologically relevant ionic strength. There is thus a question of whether an FET sensor can detect the binding event above the bilayer. In this study, we show how the existence of an SLB can influence the effective detection distance and the formation criterion of a fluid and continuous SLB on a graphene surface. We discovered that the water intercalation between the graphene and the underlying silica substrate hinders the SLB formation but is required for the stable electrical recording by a GFET. To verify the existence of a fluid SLB on graphene, which was previously complicated by the graphene fluorescence quenching effect, we developed a modified fluorescence recovery after photobleaching method. In addition, our results showed that SLB coated GFETs can quantitatively detect ligand binding onto the receptors embedded in the SLBs. The comparison of our experimental data with a theoretical model shows that the contribution of the SLB acyl chain hydrophobic region to the screening effect can be negligible and, therefore, that the effective detection region can extend beyond the SLB.
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Affiliation(s)
- Shu-Kai Hu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Fang-Yen Lo
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chih-Chen Hsieh
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Ling Chao
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
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25
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Farell M, Wetherington M, Shankla M, Chae I, Subramanian S, Kim SH, Aksimentiev A, Robinson J, Kumar M. Characterization of the Lipid Structure and Fluidity of Lipid Membranes on Epitaxial Graphene and Their Correlation to Graphene Features. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4726-4735. [PMID: 30844287 PMCID: PMC6449857 DOI: 10.1021/acs.langmuir.9b00164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Graphene has been recognized as an enhanced platform for biosensors because of its high electron mobility. To integrate active membrane proteins into graphene-based materials for such applications, graphene's surface must be functionalized with lipids to mimic the biological environment of these proteins. Several studies have examined supported lipids on various types of graphene and obtained conflicting results for the lipid structure. Here, we present a correlative characterization technique based on fluorescence measurements in a Raman spectroscopy setup to study the lipid structure and dynamics on epitaxial graphene. Compared to other graphene variations, epitaxial graphene is grown on a substrate more conducive to production of electronics and offers unique topographic features. On the basis of experimental and computational results, we propose that a lipid sesquilayer (1.5 bilayer) forms on epitaxial graphene and demonstrate that the distinct surface features of epitaxial graphene affect the structure and diffusion of supported lipids.
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Affiliation(s)
| | | | - Manish Shankla
- Department of Physics , University of Illinois at Urbana Champaign , Urbana , Illinois 61801 , United States
| | | | | | | | - Aleksei Aksimentiev
- Department of Physics , University of Illinois at Urbana Champaign , Urbana , Illinois 61801 , United States
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26
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Gupta A, Sankaran J, Wohland T. Fluorescence correlation spectroscopy: The technique and its applications in soft matter. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2017-0104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract
Fluorescence correlation spectroscopy (FCS) is a well-established single-molecule method used for the quantitative spatiotemporal analysis of dynamic processes in a wide range of samples. It possesses single-molecule sensitivity but provides ensemble averaged molecular parameters such as mobility, concentration, chemical reaction kinetics, photophysical properties and interaction properties. These parameters have been utilized to characterize a variety of soft matter systems. This review provides an overview of the basic principles of various FCS modalities, their instrumentation, data analysis, and the applications of FCS to soft matter systems.
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27
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Goldsmith BR, Locascio L, Gao Y, Lerner M, Walker A, Lerner J, Kyaw J, Shue A, Afsahi S, Pan D, Nokes J, Barron F. Digital Biosensing by Foundry-Fabricated Graphene Sensors. Sci Rep 2019; 9:434. [PMID: 30670783 PMCID: PMC6342992 DOI: 10.1038/s41598-019-38700-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 12/31/2018] [Indexed: 01/17/2023] Open
Abstract
The prevailing philosophy in biological testing has been to focus on simple tests with easy to interpret information such as ELISA or lateral flow assays. At the same time, there has been a decades long understanding in device physics and nanotechnology that electrical approaches have the potential to drastically improve the quality, speed, and cost of biological testing provided that computational resources are available to analyze the resulting complex data. This concept can be conceived of as "the internet of biology" in the same way miniaturized electronic sensors have enabled "the internet of things." It is well established in the nanotechnology literature that techniques such as field effect biosensing are capable of rapid and flexible biological testing. Until now, access to this new technology has been limited to academic researchers focused on bioelectronic devices and their collaborators. Here we show that this capability is retained in an industrially manufactured device, opening access to this technology generally. Access to this type of production opens the door for rapid deployment of nanoelectronic sensors outside the research space. The low power and resource usage of these biosensors enables biotech engineers to gain immediate control over precise biological and environmental data.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Deng Pan
- Cardea Bio Inc., San Diego, CA, USA
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28
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Kuo CJ, Chiang HC, Tseng CA, Chang CF, Ulaganathan RK, Ling TT, Chang YJ, Chen CC, Chen YR, Chen YT. Lipid-Modified Graphene-Transistor Biosensor for Monitoring Amyloid-β Aggregation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12311-12316. [PMID: 29611693 DOI: 10.1021/acsami.8b01917] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A graphene field-effect transistor (G-FET) with the spacious planar graphene surface can provide a large-area interface with cell membranes to serve as a platform for the study of cell membrane-related protein interactions. In this study, a G-FET device paved with a supported lipid bilayer (referred to as SLB/G-FET) was first used to monitor the catalytic hydrolysis of the SLB by phospholipase D. With excellent detection sensitivity, this G-FET was also modified with a ganglioside GM1-enriched SLB (GM1-SLB/G-FET) to detect cholera toxin B. Finally, the GM1-SLB/G-FET was employed to monitor amyloid-beta 40 (Aβ40) aggregation. In the early nucleation stage of Aβ40 aggregation, while no fluorescence was detectable with traditional thioflavin T (ThT) assay, the prominent electrical signals probed by GM1-SLB/G-FET demonstrate that the G-FET detection is more sensitive than the ThT assay. The comprehensive kinetic information during the Aβ40 aggregation could be collected with a GM1-SLB/G-FET, especially covering the kinetics involved in the early stage of Aβ40 aggregation. These experimental results suggest that SLB/G-FETs hold great potential as a powerful biomimetic sensor for versatile investigations of membrane-related protein functions and interaction kinetics.
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Affiliation(s)
- Chia-Jung Kuo
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Hsu-Cheng Chiang
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Chi-Ang Tseng
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Chin-Fu Chang
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Rajesh Kumar Ulaganathan
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Tzu-Ting Ling
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Yu-Jen Chang
- Genomics Research Center , Academia Sinica , No. 128, Academia Road, Sec. 2 , Nankang, Taipei 115 , Taiwan
| | - Chiao-Chen Chen
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
| | - Yun-Ru Chen
- Genomics Research Center , Academia Sinica , No. 128, Academia Road, Sec. 2 , Nankang, Taipei 115 , Taiwan
| | - Yit-Tsong Chen
- Department of Chemistry , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 106 , Taiwan
- Institute of Atomic and Molecular Sciences , Academia Sinica , P.O. Box 23-166 , Taipei 106 , Taiwan
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29
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Huang G, Mei Y. Assembly and Self-Assembly of Nanomembrane Materials-From 2D to 3D. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703665. [PMID: 29292590 DOI: 10.1002/smll.201703665] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 11/19/2017] [Indexed: 06/07/2023]
Abstract
Nanoscience and nanotechnology offer great opportunities and challenges in both fundamental research and practical applications, which require precise control of building blocks with micro/nanoscale resolution in both individual and mass-production ways. The recent and intensive nanotechnology development gives birth to a new focus on nanomembrane materials, which are defined as structures with thickness limited to about one to several hundred nanometers and with much larger (typically at least two orders of magnitude larger, or even macroscopic scale) lateral dimensions. Nanomembranes can be readily processed in an accurate manner and integrated into functional devices and systems. In this Review, a nanotechnology perspective of nanomembranes is provided, with examples of science and applications in semiconductor, metal, insulator, polymer, and composite materials. Assisted assembly of nanomembranes leads to wrinkled/buckled geometries for flexible electronics and stacked structures for applications in photonics and thermoelectrics. Inspired by kirigami/origami, self-assembled 3D structures are constructed via strain engineering. Many advanced materials have begun to be explored in the format of nanomembranes and extend to biomimetic and 2D materials for various applications. Nanomembranes, as a new type of nanomaterials, allow nanotechnology in a controllable and precise way for practical applications and promise great potential for future nanorelated products.
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Affiliation(s)
- Gaoshan Huang
- Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Yongfeng Mei
- Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, 220 Handan Road, Shanghai, 200433, China
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30
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Nikoleli GP, Nikolelis D, Siontorou CG, Karapetis S. Lipid Membrane Nanosensors for Environmental Monitoring: The Art, the Opportunities, and the Challenges. SENSORS 2018; 18:s18010284. [PMID: 29346326 PMCID: PMC5796373 DOI: 10.3390/s18010284] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 01/11/2018] [Accepted: 01/17/2018] [Indexed: 12/23/2022]
Abstract
The advent of nanotechnology has brought along new materials, techniques, and concepts, readily adaptable to lipid membrane-based biosensing. The transition from micro-sensors to nano-sensors is neither straightforward nor effortless, yet it leads to devices with superior analytical characteristics: ultra-low detectability, small sample volumes, better capabilities for integration, and more available bioelements and processes. Environmental monitoring remains a complicated field dealing with a large variety of pollutants, several decomposition products, or secondary chemicals produced ad hoc in the short- or medium term, many sub-systems affected variously, and many processes largely unknown. The new generation of lipid membranes, i.e., nanosensors, has the potential for developing monitors with site-specific analytical performance and operational stability, as well as analyte-tailored types of responses. This review presents the state-of-the art, the opportunities for niche applicability, and the challenges that lie ahead.
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Affiliation(s)
- Georgia-Paraskevi Nikoleli
- Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, Department 1, Chemical Sciences, National Technical University of Athens, 157 80 Athens, Greece.
| | - Dimitrios Nikolelis
- Laboratory of Environmental Chemistry, Department of Chemistry, University of Athens, 157 72 Athens, Greece.
| | - Christina G Siontorou
- Laboratory of Simulation of Industrial Processes, Department of Industrial Management and Technology, School of Maritime and Industry, University of Piraeus, 185 34 Piraeus, Greece.
| | - Stephanos Karapetis
- Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, Department 1, Chemical Sciences, National Technical University of Athens, 157 80 Athens, Greece.
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31
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Shaheen F, Hammad Aziz M, Fakhar-E-Alam M, Atif M, Fatima M, Ahmad R, Hanif A, Anwar S, Zafar F, Abbas G, Ali SM, Ahmed M. An In Vitro Study of the Photodynamic Effectiveness of GO-Ag Nanocomposites against Human Breast Cancer Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E401. [PMID: 29160836 PMCID: PMC5707618 DOI: 10.3390/nano7110401] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 09/29/2017] [Accepted: 10/04/2017] [Indexed: 12/19/2022]
Abstract
Graphene-based materials have garnered significant attention because of their versatile bioapplications and extraordinary properties. Graphene oxide (GO) is an extremely oxidized form of graphene accompanied by the functional groups of oxygen on its surface. GO is an outstanding platform on which to pacify silver nanoparticles (Ag NPs), which gives rise to the graphene oxide-silver nanoparticle (GO-Ag) nanocomposite. In this experimental study, the toxicity of graphene oxide-silver (GO-Ag) nanocomposites was assessed in an in vitro human breast cancer model to optimize the parameters of photodynamic therapy. GO-Ag was prepared using the hydrothermal method, and characterization was done by X-ray diffraction, field-emission scanning electron microscope (FE-SEM), transmission Electron Microscopy (TEM), energy dispersive X-rays Analysis (EDAX), atomic force microscopy and ultraviolet-visible spectroscopy. The experiments were done both with laser exposure, as well as in darkness, to examine the phototoxicity and cytotoxicity of the nanocomposites. The cytotoxicity of the GO-Ag was confirmed via a methyl-thiazole-tetrazolium (MTT) assay and intracellular reactive oxygen species production analysis. The phototoxic effect explored the dose-dependent decrease in the cell viability, as well as provoked cell death via apoptosis. An enormously significant escalation of ¹O₂ in the samples when exposed to daylight was perceived. Statistical analysis was performed on the experimental results to confirm the worth and clarity of the results, with p-values < 0.05 selected as significant. These outcomes suggest that GO-Ag nanocomposites could serve as potential candidates for targeted breast cancer therapy.
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Affiliation(s)
- Fozia Shaheen
- Department of Physics, Government College (GC) University, Lahore 54000, Pakistan.
| | - Muhammad Hammad Aziz
- Department of Physics, COMSATS Institute of Information and Technology, Lahore 54000, Pakistan.
| | - Muhammad Fakhar-E-Alam
- Department of Physics, Government College (GC) University, Faisalabad 38000, Pakistan.
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Muhammad Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
- National Institute of Laser and Optronics, Nilore 45650, Islamabad.
| | - Mahvish Fatima
- Department of Physics, University of Lahore, Lahore 54000, Pakistan.
| | - Riaz Ahmad
- The Centre for Advanced Studies in Physics (CASP), Government College (GC) University, Church Road, Lahore 54000, Pakistan.
| | - Atif Hanif
- Botany and Microbiology Department, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Saqib Anwar
- Industrial Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
| | - Fatima Zafar
- Department of Chemistry, GC University, Lahore 54000, Pakistan.
| | - Ghazanfar Abbas
- Department of Physics, COMSATS Institute of Information and Technology, Lahore 54000, Pakistan.
| | - Syed Mansoor Ali
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Mukhtar Ahmed
- Department of Physics, COMSATS Institute of Information and Technology, Lahore 54000, Pakistan.
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32
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Liu Y, Liu J. Hybrid nanomaterials of WS 2 or MoS 2 nanosheets with liposomes: biointerfaces and multiplexed drug delivery. NANOSCALE 2017; 9:13187-13194. [PMID: 28853471 DOI: 10.1039/c7nr04199c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Lipid containing hybrid materials are of significant interest for biointerface research and drug delivery applications, and a large number of previous studies have focused on graphene oxide (GO). In this work, novel hybrid materials made of transition metal dichalcogenides (TMDCs) and phosphocholine (DOPC) liposomes were prepared and compared with GO. All these inorganic materials are 2D nanosheets. DOPC liposomes are adsorbed by tungsten disulfide (WS2) as intact liposomes as indicated by cryo-TEM and liposome leakage assays. WS2 likely uses van der Waals forces for liposome adsorption as determined from urea, salt, and surfactant washing experiments. In addition, WS2 adsorbed doxorubicin (DOX) and DOPC liposomes synergistically. The adsorption capacity of DOPC on bare WS2 was 22.5% of the weight of WS2. After adsorbing DOX on WS2, the liposome adsorption capacity increased to ∼110%. Hydrogen bonding also contributed to liposome adsorption on DOX-loaded WS2. Confocal fluorescence microscopy confirmed the uptake of the DOPC/WS2 hybrid material by HeLa cells, and the co-delivery of DOX and calcein was achieved by loading calcein inside the liposomes. This study provides fundamental insights into the interaction between PC liposomes and WS2. Furthermore, preliminary biomedical applications of this hybrid material were explored.
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Affiliation(s)
- Yibo Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
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33
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Grande CD, Mangadlao J, Fan J, De Leon A, Delgado-Ospina J, Rojas JG, Rodrigues DF, Advincula R. Chitosan Cross-Linked Graphene Oxide Nanocomposite Films with Antimicrobial Activity for Application in Food Industry. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/masy.201600114] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Carlos David Grande
- Grupo de Investigación Biotecnología; Universidad de San Buenaventura Cali; Cali A.A. 7154 Colombia
- Grupo de Investigación en Fotoquímica y Fotobiología; Universidad del Atlántico; Kilómetro 7 Vía Puerto Colombia Colombia
| | - Joey Mangadlao
- Case Western Reserve University, Department of Macromolecular Science and Engineering; 2100 Adelbert Road, Kent Hale Smith Bldg Cleveland OH 44106 USA
| | - Jingjing Fan
- Department of Civil and Department of Environmental Engineering; University of Houston; Houston TX 77204-5003 USA
| | - Al De Leon
- Case Western Reserve University, Department of Macromolecular Science and Engineering; 2100 Adelbert Road, Kent Hale Smith Bldg Cleveland OH 44106 USA
| | - Johannes Delgado-Ospina
- Grupo de Investigación Biotecnología; Universidad de San Buenaventura Cali; Cali A.A. 7154 Colombia
| | - Juan Gabriel Rojas
- Grupo de Investigación Biotecnología; Universidad de San Buenaventura Cali; Cali A.A. 7154 Colombia
| | - Debora F. Rodrigues
- Department of Civil and Department of Environmental Engineering; University of Houston; Houston TX 77204-5003 USA
| | - Rigoberto Advincula
- Case Western Reserve University, Department of Macromolecular Science and Engineering; 2100 Adelbert Road, Kent Hale Smith Bldg Cleveland OH 44106 USA
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34
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Biosensors Based on Lipid Modified Graphene Microelectrodes. C — JOURNAL OF CARBON RESEARCH 2017. [DOI: 10.3390/c3010009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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35
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Fu W, Jiang L, van Geest EP, Lima LMC, Schneider GF. Sensing at the Surface of Graphene Field-Effect Transistors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1603610. [PMID: 27896865 DOI: 10.1002/adma.201603610] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/18/2016] [Indexed: 05/21/2023]
Abstract
Recent research trends now offer new opportunities for developing the next generations of label-free biochemical sensors using graphene and other two-dimensional materials. While the physics of graphene transistors operated in electrolyte is well grounded, important chemical challenges still remain to be addressed, namely the impact of the chemical functionalizations of graphene on the key electrical parameters and the sensing performances. In fact, graphene - at least ideal graphene - is highly chemically inert. The functionalizations and chemical alterations of the graphene surface - both covalently and non-covalently - are crucial steps that define the sensitivity of graphene. The presence, reactivity, adsorption of gas and ions, proteins, DNA, cells and tissues on graphene have been successfully monitored with graphene. This review aims to unify most of the work done so far on biochemical sensing at the surface of a (chemically functionalized) graphene field-effect transistor and the challenges that lie ahead. The authors are convinced that graphene biochemical sensors hold great promise to meet the ever-increasing demand for sensitivity, especially looking at the recent progresses suggesting that the obstacle of Debye screening can be overcome.
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Affiliation(s)
- Wangyang Fu
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lin Jiang
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Erik P van Geest
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lia M C Lima
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Grégory F Schneider
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
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36
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Zhao G, Li X, Huang M, Zhen Z, Zhong Y, Chen Q, Zhao X, He Y, Hu R, Yang T, Zhang R, Li C, Kong J, Xu JB, Ruoff RS, Zhu H. The physics and chemistry of graphene-on-surfaces. Chem Soc Rev 2017; 46:4417-4449. [DOI: 10.1039/c7cs00256d] [Citation(s) in RCA: 260] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review describes the major “graphene-on-surface” structures and examines the roles of their properties in governing the overall performance for specific applications.
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Affiliation(s)
- Guoke Zhao
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Xinming Li
- Department of Electronic Engineering
- The Chinese University of Hong Kong
- China
| | - Meirong Huang
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Zhen Zhen
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Yujia Zhong
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Qiao Chen
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Xuanliang Zhao
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Yijia He
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Ruirui Hu
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Tingting Yang
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Rujing Zhang
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Changli Li
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
| | - Jing Kong
- Department of Electrical Engineering and Computer Sciences
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Jian-Bin Xu
- Department of Electronic Engineering
- The Chinese University of Hong Kong
- China
| | - Rodney S. Ruoff
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), and Department of Chemistry
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Republic of Korea
| | - Hongwei Zhu
- State Key Lab of New Ceramics and Fine Processing
- School of Materials Science and Engineering, and Center for Nano and Micro Mechanics
- Tsinghua University
- Beijing 100084
- China
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37
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Lima LMC, Fu W, Jiang L, Kros A, Schneider GF. Graphene-stabilized lipid monolayer heterostructures: a novel biomembrane superstructure. NANOSCALE 2016; 8:18646-18653. [PMID: 27722521 DOI: 10.1039/c6nr05706c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Chemically defined and electronically benign interfaces are attractive substrates for graphene and other two-dimensional materials. Here, we introduce lipid monolayers as an alternative, structurally ordered, and chemically versatile support for graphene. Deposition of graphene on the lipids resulted in a more ordered monolayer than regions without graphene. The lipids also offered graphene a more uniform and smoother support, reducing graphene hysteresis loop and the average value of the charge neutrality point under applied voltages. Our approach promises to be effective towards measuring experimentally biochemical phenomena within lipid monolayers and bilayers.
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Affiliation(s)
- Lia M C Lima
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC Leiden, The Netherlands.
| | - Wangyang Fu
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC Leiden, The Netherlands.
| | - Lin Jiang
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC Leiden, The Netherlands.
| | - Alexander Kros
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC Leiden, The Netherlands.
| | - Grégory F Schneider
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC Leiden, The Netherlands.
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38
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Li Y, Qian Z, Ma L, Hu S, Nong D, Xu C, Ye F, Lu Y, Wei G, Li M. Single-molecule visualization of dynamic transitions of pore-forming peptides among multiple transmembrane positions. Nat Commun 2016; 7:12906. [PMID: 27686409 PMCID: PMC5056435 DOI: 10.1038/ncomms12906] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 08/16/2016] [Indexed: 01/05/2023] Open
Abstract
Research on the dynamics of single-membrane proteins remains underdeveloped due to the lack of proper approaches that can probe in real time the protein's insertion depth in lipid bilayers. Here we report a single-molecule visualization method to track both vertical insertion and lateral diffusion of membrane proteins in supported lipid bilayers by exploiting the surface-induced fluorescence attenuation (SIFA) of fluorophores. The attenuation follows a d−4 dependency, where d is the fluorophore-to-surface distance. The method is validated by observing the antimicrobial peptide LL-37 to transfer among five transmembrane positions: the surface, the upper leaflet, the centre, the lower leaflet and the bottom of the lipid bilayer. These results demonstrate the power of SIFA to study protein-membrane interactions and provide unprecedented in-depth understanding of molecular mechanisms of the insertion and translocation of membrane proteins. Assessing protein localization within lipid membranes is problematic. Here, the authors describe a single molecule visualization method based on surface-induced fluorescence attenuation (SIFA) to determine the insertion depth and lateral diffusion of a peptide in a lipid bilayer.
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Affiliation(s)
- Ying Li
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhenyu Qian
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, Shanghai 200433, China
| | - Li Ma
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Shuxin Hu
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Daguan Nong
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Chunhua Xu
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Fangfu Ye
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ying Lu
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Guanghong Wei
- State Key Laboratory of Surface Physics, Key Laboratory for Computational Physical Sciences (Ministry of Education), and Department of Physics, Fudan University, Shanghai 200433, China
| | - Ming Li
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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39
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Intercalated water layers promote thermal dissipation at bio-nano interfaces. Nat Commun 2016; 7:12854. [PMID: 27659484 PMCID: PMC5036148 DOI: 10.1038/ncomms12854] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 08/09/2016] [Indexed: 01/18/2023] Open
Abstract
The increasing interest in developing nanodevices for biophysical and biomedical applications results in concerns about thermal management at interfaces between tissues and electronic devices. However, there is neither sufficient knowledge nor suitable tools for the characterization of thermal properties at interfaces between materials of contrasting mechanics, which are essential for design with reliability. Here we use computational simulations to quantify thermal transfer across the cell membrane–graphene interface. We find that the intercalated water displays a layered order below a critical value of ∼1 nm nanoconfinement, mediating the interfacial thermal coupling, and efficiently enhancing the thermal dissipation. We thereafter develop an analytical model to evaluate the critical value for power generation in graphene before significant heat is accumulated to disturb living tissues. These findings may provide a basis for the rational design of wearable and implantable nanodevices in biosensing and thermotherapic treatments where thermal dissipation and transport processes are crucial. Thermal management is important for designing bio-nano interfaces for biosensing and thermotherapic applications. Here the authors perform simulations showing that nm-thick water layers between graphene and cell membranes display layered ordering, promoting interfacial thermal coupling and thermal dissipation.
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40
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Hirtz M, Oikonomou A, Clark N, Kim YJ, Fuchs H, Vijayaraghavan A. Self-limiting multiplexed assembly of lipid membranes on large-area graphene sensor arrays. NANOSCALE 2016; 8:15147-51. [PMID: 27494423 DOI: 10.1039/c6nr04615k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Phospholipid membranes of different functionalities were simultaneously assembled on arrays of graphene surfaces in a parallel manner using multi-pen lipid dip-pen nano-lithography. The graphene patch facilitates and restricts the spreading of lipids within itself, obviating the need to scan the writing probes and reducing writing time. Binding studies establish that the lipids retain the functionality.
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Affiliation(s)
- Michael Hirtz
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Germany.
| | | | - Nick Clark
- School of Materials, The University of Manchester, UK.
| | - Yong-Jin Kim
- School of Physics and Astronomy, The University of Manchester, UK
| | - Harald Fuchs
- Institute of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Germany. and Physical Institute and Center for Nanotechnology (CeNTech), University of Münster, Germany
| | - Aravind Vijayaraghavan
- National Graphene Institute, The University of Manchester, UK and School of Materials, The University of Manchester, UK.
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41
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Vij V, Bhalla V, Kumar M. Hexaarylbenzene: Evolution of Properties and Applications of Multitalented Scaffold. Chem Rev 2016; 116:9565-627. [DOI: 10.1021/acs.chemrev.6b00144] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Varun Vij
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Vandana Bhalla
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Manoj Kumar
- Department of Chemistry,
UGC Centre for Advanced Studies, Guru Nanak Dev University, Amritsar, Punjab 143005, India
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42
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Hu X, Lei H, Zhang X, Zhang Y. Strong hydrophobic interaction between graphene oxide and supported lipid bilayers revealed by AFM. Microsc Res Tech 2016; 79:721-6. [PMID: 27252153 DOI: 10.1002/jemt.22690] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/27/2016] [Accepted: 05/19/2016] [Indexed: 01/30/2023]
Abstract
Understanding the interaction between graphene oxide (GO) and lipid membranes is of great importance for its various applications in biotechnology. Here, we investigated the interaction between GO and charged supported lipid bilayers (SLBs) by in situ atomic force microscope (AFM) imaging. It was found that GO could peel off a single layer of positively charged SLBs and deposited on the hydrophobic part of the remaining sublayer. Then free lipid molecules would assemble on GO surface and formed 1.5 bilayers in a lipid-GO-lipid manner. For negatively charged lipid bilayers, however, GO deposited to the SLBs only when its concentration was very high. These results indicate that, in addition to electrostatic interaction, the hydrophobic interaction plays an important role when GO sheets deposit onto the charged lipid bilayers, and should be helpful to understand possible cytotoxicity and antibiosis of graphene-related nanomaterials. Microsc. Res. Tech. 79:721-726, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Xiuyuan Hu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haozhi Lei
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xueqiang Zhang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yi Zhang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
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43
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Tabaei SR, Ng WB, Cho SJ, Cho NJ. Controlling the Formation of Phospholipid Monolayer, Bilayer, and Intact Vesicle Layer on Graphene. ACS APPLIED MATERIALS & INTERFACES 2016; 8:11875-80. [PMID: 27092949 DOI: 10.1021/acsami.6b02837] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Exciting progress has been made in the use of graphene for bio- and chemical sensing applications. In this regard, interfacing lipid membranes with graphene provides a high-sealing interface that is resistant to nonspecific protein adsorption and suitable for measuring biomembrane-associated interactions. However, a controllable method to form well-defined lipid bilayer coatings remains elusive, and there are varying results in the literature. Herein, we demonstrate how design strategies based on molecular self-assembly and surface chemistry can be employed to coat graphene surface with different classes of lipid membrane architectures. We characterize the self-assembly of lipid membranes on CVD-graphene using quartz crystal microbalance with dissipation, field-effect transistor, and Raman spectroscopy. By employing the solvent-assisted lipid bilayer (SALB) method, a lipid monolayer and bilayer were formed on pristine and oxygen-plasma-treated CVD-graphene, respectively. On these surfaces, vesicle fusion method resulted in formation of a lipid monolayer and intact vesicle layer, respectively. Collectively, these findings provide the basis for improved surface functionalization strategies on graphene toward bioelectronic applications.
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Affiliation(s)
| | | | - Sang-Joon Cho
- Research and Development Center, Park Systems , Suwon 443-270, South Korea
- Advanced Institute of Convergence Technology, Seoul National University , Suwon 443-270, South Korea
| | - Nam-Joon Cho
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, 637459 Singapore
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44
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Liu J. Interfacing Zwitterionic Liposomes with Inorganic Nanomaterials: Surface Forces, Membrane Integrity, and Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4393-404. [PMID: 27093351 DOI: 10.1021/acs.langmuir.6b00493] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Zwitterionic phosphocholine (PC) lipids are the main constituent of the mammalian cell membrane. PC bilayers are known for their antifouling properties, yet they are adsorbed by all tested inorganic nanoparticles. This feature article is focused on the developments in my laboratory in the past few years on this topic. The main experimental techniques include fluorescence-based liposome leakage assays, adsorption and desorption, and cryo-TEM. Different materials interact with PC liposomes differently. PC liposomes adsorb on SiO2, followed by membrane fusion with the surface forming supported lipid bilayers. TiO2 and other metal oxides adsorb only intact PC liposomes via lipid phosphate bonding; the steric effect from the choline group hinders subsequent liposome fusion onto the particles. Citrate-capped AuNPs are adsorbed very strongly via van der Waals forces, inducing local gelation. The result is transient liposome leakage upon AuNP adsorption or desorption and AuNP aggregation on the liposome surface. All carbon-based nanomaterials (graphene oxides, carbon nanotubes, and nanodiamond) are adsorbed mainly via hydrogen bonding. The oxidation level of graphene oxide strongly influences the outcome of the final hybrid material. In the context of inorganic nanoparticle adsorption, insights are given regarding the lack of protein adsorption by PC bilayers. These inorganic/lipid hybrid materials can be used for controlled release, drug delivery, and fundamental studies. A few examples of application are covered toward the end, and future perspectives are given.
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Affiliation(s)
- Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo , Waterloo, Ontario N2L 3G1, Canada
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Huang PJJ, Wang F, Liu J. Liposome/Graphene Oxide Interaction Studied by Isothermal Titration Calorimetry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2458-2463. [PMID: 26908113 DOI: 10.1021/acs.langmuir.6b00006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The interaction between graphene oxide (GO) and lipid bilayers is important for fundamental surface science and many applications. In this work, isothermal titration calorimetry (ITC), cryo-TEM, and fluorescence spectroscopy were used to study the adsorption of three types of liposomes. Heat release was observed when GO was mixed with zwitterionic DOPC liposomes, while heat absorption occurred with cationic DOTAP liposomes. For comparison, anionic DOPG liposomes released heat when mixed with DOTAP. DOPC was adsorbed as intact liposomes, but DOTAP ruptured and induced stacking and folding of GO sheets. This study suggests the release of more water molecules from the GO surface when mixed with DOTAP liposomes. This can be rationalized by the full rupture of the DOTAP liposomes interacting with the whole GO surface, including hydrophobic regions, while DOPC liposomes only interact with a small area on GO near the edge, which is likely to be more hydrophilic. This interesting biointerfacial observation has enhanced our fundamental understanding of lipid/GO interactions.
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Affiliation(s)
- Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
| | - Feng Wang
- Department of Chemistry, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
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Wang Y, Xu Z. Water Intercalation for Seamless, Electrically Insulating, and Thermally Transparent Interfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:1970-1976. [PMID: 26720217 DOI: 10.1021/acsami.5b10173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The interface between functional nanostructures and host substrates is of pivotal importance in the design of their nanoelectronic applications because it conveys energy and information between the device and environment. We report here an interface-engineering approach to establish a seamless, electrically insulating, while thermally transparent interface between graphene and metal substrates by introducing water intercalation. Molecular dynamics simulations and first-principles calculations are performed to demonstrate this concept of design, showing that the presence of the interfacial water layer helps to unfold wrinkles formed in the graphene membrane, insulate the electronic coupling between graphene and the substrate, and elevate the interfacial thermal conductance. The findings here lay the ground for a new class of nanoelectronic setups through interface engineering, which could lead to significant improvement in the performance of nanodevices, such as the field-effect transistors.
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Affiliation(s)
- Yanlei Wang
- Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University , Beijing 100084, People's Republic of China
| | - Zhiping Xu
- Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University , Beijing 100084, People's Republic of China
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Wang F, Curry DE, Liu J. Driving Adsorbed Gold Nanoparticle Assembly by Merging Lipid Gel/Fluid Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13271-13274. [PMID: 26595673 DOI: 10.1021/acs.langmuir.5b03606] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Surface forces between inorganic nanoparticles and lipid bilayer is of great relevance to biophysics, medicine, and nanobiotechnology. Adsorbed nanoparticles may influence the fluidity of the underlying lipids, which may in turn influence nanoparticle assembly. Herein three types of lipids (DOPC, Tc = -20 °C; DMPC, Tc = 23 °C; and DPPC, Tc = 41 °C) are used, all with the same phosphocholine (PC) headgroup. Gold nanoparticle (AuNP) color change is monitored as a function of lipid phase transition temperature (Tc), surface ligands on AuNPs, and temperature. Liposomes with higher fluidity induce much faster aggregation of AuNPs. Aside from the kinetic aspect of faster diffusion on fluid bilayers, this faster color change is attributed to the local lipid gelation and merging of gelled regions to eliminate the interface between different lipid phases.
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Affiliation(s)
- Feng Wang
- Department of Chemistry and ‡Department of Biology, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
| | - Dennis E Curry
- Department of Chemistry and ‡Department of Biology, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
| | - Juewen Liu
- Department of Chemistry and ‡Department of Biology, Waterloo Institute for Nanotechnology , Waterloo, Ontario, Canada N2L 3G1
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Akbari E, Buntat Z, Shahraki E, Parvaz R, Kiani MJ. Analytical investigation of bilayer lipid biosensor based on graphene. J Biomater Appl 2015; 30:677-85. [DOI: 10.1177/0885328215585682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Graphene is another allotrope of carbon with two-dimensional monolayer honeycomb. Owing to its special characteristics including electrical, physical and optical properties, graphene is known as a more suitable candidate compared to other materials to be used in the sensor application. It is possible, moreover, to use biosensor by using electrolyte-gated field effect transistor based on graphene (GFET) to identify the alterations in charged lipid membrane properties. The current article aims to show how thickness and charges of a membrane electric can result in a monolayer graphene-based GFET while the emphasis is on the conductance variation. It is proposed that the thickness and electric charge of the lipid bilayer (LLP and QLP) are functions of carrier density, and to find the equation relating these suitable control parameters are introduced. Artificial neural network algorithm as well as support vector regression has also been incorporated to obtain other models for conductance characteristic. The results comparison between analytical models, artificial neural network and support vector regression with the experimental data extracted from previous work show an acceptable agreement.
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Affiliation(s)
- Elnaz Akbari
- Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
| | - Zolkafle Buntat
- Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
| | - Elmira Shahraki
- Department of Communications Engineering, University of Sistan and Baluchestan, Zahedan, Iran
| | - Ramtin Parvaz
- Department of Electrical Engineering, Neyriz Branch, Islamic Azad University, Neyriz, Iran
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Huang PJJ, Pautler R, Shanmugaraj J, Labbé G, Liu J. Inhibiting the VIM-2 Metallo-β-Lactamase by Graphene Oxide and Carbon Nanotubes. ACS APPLIED MATERIALS & INTERFACES 2015; 7:9898-9903. [PMID: 25897818 DOI: 10.1021/acsami.5b01954] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Metallo-β-lactamases (MBLs) degrade a broad spectrum of antibiotics including the latest carbapenems. So far, limited success has been achieved in developing its inhibitors using small organic molecules. VIM-2 is one of the most studied and important MBLs. In this work, we screened 10 nanomaterials, covering a diverse range of surface properties including charge, hydrophobicity, and specific chemical bonding. Among these, graphene oxide and carbon nanotubes are the most potent inhibitors, while most other materials do not show much inhibition effect. The inhibition is noncompetitive and is attributed to the hydrophobic interaction with the enzyme. Adsorption of VIM-2 was further probed using protein displacement assays where it cannot displace or be displaced by bovine serum albumin (BSA). This information is useful for rational design inhibitors for MBLs and more specific inhibition might be achieved by further surface modifications on these nanocarbons.
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Affiliation(s)
- Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Rachel Pautler
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Jenitta Shanmugaraj
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Geneviève Labbé
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Zhou W, Wang YY, Lim TS, Pham T, Jain D, Burke PJ. Detection of single ion channel activity with carbon nanotubes. Sci Rep 2015; 5:9208. [PMID: 25778101 PMCID: PMC4361846 DOI: 10.1038/srep09208] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 02/24/2015] [Indexed: 12/16/2022] Open
Abstract
Many processes in life are based on ion currents and membrane voltages controlled by a sophisticated and diverse family of membrane proteins (ion channels), which are comparable in size to the most advanced nanoelectronic components currently under development. Here we demonstrate an electrical assay of individual ion channel activity by measuring the dynamic opening and closing of the ion channel nanopores using single-walled carbon nanotubes (SWNTs). Two canonical dynamic ion channels (gramicidin A (gA) and alamethicin) and one static biological nanopore (α-hemolysin (α-HL)) were successfully incorporated into supported lipid bilayers (SLBs, an artificial cell membrane), which in turn were interfaced to the carbon nanotubes through a variety of polymer-cushion surface functionalization schemes. The ion channel current directly charges the quantum capacitance of a single nanotube in a network of purified semiconducting nanotubes. This work forms the foundation for a scalable, massively parallel architecture of 1d nanoelectronic devices interrogating electrophysiology at the single ion channel level.
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Affiliation(s)
- Weiwei Zhou
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
| | - Yung Yu Wang
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
| | - Tae-Sun Lim
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
| | - Ted Pham
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
| | - Dheeraj Jain
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
| | - Peter J. Burke
- Integrated Nanosystems Research Facility, Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA, 92697 USA
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