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Lamellar Orientation of a Block Copolymer via an Electron-Beam Induced Polarity Switch in a Nitrophenyl Self-Assembled Monolayer or Si Etching Treatments. QUANTUM BEAM SCIENCE 2020. [DOI: 10.3390/qubs4020019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Directed self-assembly (DSA) was investigated on self-assembled monolayers (SAMs) chemically modified by electron beam (EB) irradiation, which is composed of 6-(4-nitrophenoxy) hexane-1-thiol (NPHT). Irradiating a NPHT by EB could successfully induce the orientation and selective patterning of block copolymer domains. We clarified that spatially-selective lamellar orientations of polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) could be achieved by a change of an underlying SAM. The change of an underlying SAM is composed of the transition of an NO2 group to an NH2 group, which is induced by EB. The modification in the polarity of different regions of the SAM with EB lithography controlled the lamellar orientation of PS-b-PMMA. The reduction of the NPHT SAM plays an important role in the orientation of block copolymer. This method might significantly simplify block copolymer DSA processes when it is compared to the conventional DSA process. By investigating the lamellae orientation with EB, it is clarified that only suitable annealing temperatures and irradiation doses lead to the vertical orientation. We also fabricated pre-patterned Si substrates by EB lithographic patterning and reactive ion etching (RIE). DSA onto such pre-patterned Si substrates was proven to be successful for subdivision of the lithographic patterns into line and space patterns.
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2
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Channapura Halappa C, Park SJ. Pattern formation using polystyrene benzaldimine self-assembled monolayer by soft X-ray. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chandrashekhar Channapura Halappa
- Department of Chemical Engineering; Chungnam National University; 220 Gung- Dong, Yuseong-Gu Daejeon 305-764 Republic of South Korea
- Department of Post Graduation Studies in Chemistry; Kadur, Kuvempu University; 577548 Karnataka India
| | - So-Jin Park
- Department of Chemical Engineering; Chungnam National University; 220 Gung- Dong, Yuseong-Gu Daejeon 305-764 Republic of South Korea
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Leuschel B, Gwiazda A, Heni W, Diot F, Yu SY, Bidaud C, Vonna L, Ponche A, Haidara H, Soppera O. Deep-UV photoinduced chemical patterning at the micro- and nanoscale for directed self-assembly. Sci Rep 2018; 8:10444. [PMID: 29992969 PMCID: PMC6041335 DOI: 10.1038/s41598-018-28196-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 06/14/2018] [Indexed: 11/29/2022] Open
Abstract
Deep-UV (DUV) laser patterning has been widely used in recent years for micro- and nanopatterning, taking advantage of the specific properties of irradiation with high-energy photons. In this paper, we show the usefulness of DUV laser patterning for preparing surfaces with controlled chemical properties at the micro- and nanoscale. Our motivation was to develop a simple and versatile method for chemical patterning at multiscales (from mm to nm) over relatively wide areas (mm2 to cm2). The chemical properties were provided by self-assembled monolayers (SAMs), prepared on glass or silicon wafers. We first investigated their modification under our irradiation conditions (ArF laser) using AFM, XPS and contact angle measurements. Photopatterning was then demonstrated with minimum feature sizes as small as 75 nm, and we showed the possibility to regraft a second SAM on the irradiated regions. Finally, we used these chemically patterned surfaces for directed self-assembly of several types of objects, such as block copolymers, sol-gel materials and liquids by vapor condensation.
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Affiliation(s)
- Benjamin Leuschel
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Agnieszka Gwiazda
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Wajdi Heni
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Frédéric Diot
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Shang-Yu Yu
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Clémentine Bidaud
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Laurent Vonna
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Arnaud Ponche
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Hamidou Haidara
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France
| | - Olivier Soppera
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, 15 rue Jean Starcky, 68057, Mulhouse, France.
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Yang J, Wang J. Radiation chemistry of molecular compounds and polymers by soft X-ray spectroscopy and microscopy. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Soft X-ray-induced radiation chemistry in selected Fe molecular compounds and some aliphatic polymers was studied using soft X-ray absorption spectroscopy, and scanning transmission X-ray microscopy. X-ray absorption near-edge structure (XANES) spectroscopy was used to elucidate the radiation chemistry. The results show that damage to the Fe molecular complexes involves Fe-ligand bond breaking, ligand damage, and subsequent photoreduction of Fe(III) if it is not tightly bonded to oxygen. Upon radiation damage, polymer PAN primarily undergoes chemical structure changes without mass loss, PECA experiences chemical structure changes as well as small mass loss, while PPC and PEC suffer large mass loss with chemical structure changes. These studies are not only important to X-ray analysis of radiation sensitive materials but also are valuable to the applications of X-ray lithography and other types of nanofabrication involving photoresist.
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Affiliation(s)
- Jianjun Yang
- Institute of Environmental and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P. R. China, 100081
| | - Jian Wang
- Canadian Light Source Inc., University of Saskatchewan, Saskatoon, SK S7N 2V3, Canada
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Majewski PW, Yager KG. Rapid ordering of block copolymer thin films. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:403002. [PMID: 27537062 DOI: 10.1088/0953-8984/28/40/403002] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Block-copolymers self-assemble into diverse morphologies, where nanoscale order can be finely tuned via block architecture and processing conditions. However, the ultimate usage of these materials in real-world applications may be hampered by the extremely long thermal annealing times-hours or days-required to achieve good order. Here, we provide an overview of the fundamentals of block-copolymer self-assembly kinetics, and review the techniques that have been demonstrated to influence, and enhance, these ordering kinetics. We discuss the inherent tradeoffs between oven annealing, solvent annealing, microwave annealing, zone annealing, and other directed self-assembly methods; including an assessment of spatial and temporal characteristics. We also review both real-space and reciprocal-space analysis techniques for quantifying order in these systems.
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Affiliation(s)
- Pawel W Majewski
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA. Department of Chemistry, University of Warsaw, Warsaw, Poland
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Jin XS, Pang YY, Ji SX. From self-assembled monolayers to chemically patterned brushes: Controlling the orientation of block copolymer domains in films by substrate modification. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-016-1800-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Yager KG, Forrey C, Singh G, Satija SK, Page KA, Patton DL, Douglas JF, Jones RL, Karim A. Thermally-induced transition of lamellae orientation in block-copolymer films on 'neutral' nanoparticle-coated substrates. SOFT MATTER 2015; 11:5154-5167. [PMID: 26053660 DOI: 10.1039/c5sm00896d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Block-copolymer orientation in thin films is controlled by the complex balance between interfacial free energies, including the inter-block segregation strength, the surface tensions of the blocks, and the relative substrate interactions. While block-copolymer lamellae orient horizontally when there is any preferential affinity of one block for the substrate, we recently described how nanoparticle-roughened substrates can be used to modify substrate interactions. We demonstrate how such 'neutral' substrates can be combined with control of annealing temperature to generate vertical lamellae orientations throughout a sample, at all thicknesses. We observe an orientational transition from vertical to horizontal lamellae upon heating, as confirmed using a combination of atomic force microscopy (AFM), neutron reflectometry (NR) and rotational small-angle neutron scattering (RSANS). Using molecular dynamics (MD) simulations, we identify substrate-localized distortions to the lamellar morphology as the physical basis of the novel behavior. In particular, under strong segregation conditions, bending of horizontal lamellae induce a large energetic cost. At higher temperatures, the energetic cost of conformal deformations of lamellae over the rough substrate is reduced, returning lamellae to the typical horizontal orientation. Thus, we find that both surface interactions and temperature play a crucial role in dictating block-copolymer lamellae orientation. Our combined experimental and simulation findings suggest that controlling substrate roughness should provide a useful and robust platform for controlling block-copolymer orientation in applications of these materials.
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Affiliation(s)
- Kevin G Yager
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA.
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Samant S, Hailu ST, Al‐Enizi AM, Karim A, Raghavan D. Orientation control in nanoparticle filled block copolymer cold zone annealed films. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23684] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Saumil Samant
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
| | - Shimelis T. Hailu
- Department of ChemistryHoward UniversityWashington District of Columbia20059
| | - Abdullah M. Al‐Enizi
- Department of Chemistry Faculty of ScienceKing Saud UniversityP.O. Box 2455Riyadh11451 Saudi Arabia
| | - Alamgir Karim
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
| | - Dharmaraj Raghavan
- Department of ChemistryHoward UniversityWashington District of Columbia20059
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Hailu ST, Samant S, Grabowski C, Durstock M, Karim A, Raghavan D. Synthesis of highly dispersed, block copolymer‐grafted TiO
2
nanoparticles within neat block copolymer films. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27460] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Saumil Samant
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
| | | | - Michael Durstock
- Air Force Research Lab, Wright‐Patterson Air Force BaseDayton Ohio45433
| | - Alamgir Karim
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
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Richter AG, Kuzmenko I. Using in situ X-ray reflectivity to study protein adsorption on hydrophilic and hydrophobic surfaces: benefits and limitations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5167-5180. [PMID: 23586436 DOI: 10.1021/la3049532] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have employed in situ X-ray reflectivity (IXRR) to study the adsorption of a variety of proteins (lysozyme, cytochrome c, myoglobin, hemoglobin, serum albumin, and immunoglobulin G) on model hydrophilic (silicon oxide) and hydrophobic surfaces (octadecyltrichlorosilane self-assembled monolayers), evaluating this recently developed technique for its applicability in the area of biomolecular studies. We report herein the highest resolution depiction of adsorbed protein films, greatly improving on the precision of previous neutron reflectivity (NR) results and previous IXRR studies. We were able to perform complete scans in 5 min or less with the maximum momentum transfer of at least 0.52 Å(-1), allowing for some time-resolved information about the evolution of the protein film structure. The three smallest proteins (lysozyme, cytochrome c, and myoglobin) were seen to deposit as fully hydrated, nondenatured molecules onto hydrophilic surfaces, with indications of particular preferential orientations. Time evolution was observed for both lysozyme and myoglobin films. The larger proteins were not observed to deposit on the hydrophilic substrates, perhaps because of contrast limitations. On hydrophobic surfaces, all proteins were seen to denature extensively in a qualitatively similar way but with a rough trend that the larger proteins resulted in lower coverage. We have generated high-resolution electron density profiles of these denatured films, including capturing the growth of a lysozyme film. Because the solution interface of these denatured films is diffuse, IXRR cannot unambiguously determine the film extent and coverage, a drawback compared to NR. X-ray radiation damage was systematically evaluated, including the controlled exposure of protein films to high-intensity X-rays and exposure of the hydrophobic surface to X-rays before adsorption. Our analysis showed that standard measuring procedures used for XRR studies may lead to altered protein films; therefore, we used modified procedures to limit the influence of X-ray damage.
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Affiliation(s)
- Andrew G Richter
- Department of Physics and Astronomy, Valparaiso University, Valparaiso, Indiana 46383, USA.
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Mizuno H, Buriak JM. Building upon patterned organic monolayers produced via catalytic stamp lithography. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2301-2307. [PMID: 20735101 DOI: 10.1021/am100348f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Soft lithographic sub-100 nm chemical patterning was demonstrated on organic monolayer surfaces using poly(dimethylsiloxane)-based stamps decorated with Pd nanostructures, structures termed "catalytic stamps". Chemically reactive azide or alkene functionalities were incorporated on oxide-capped silicon surfaces and utilized for patterning via Pd-catalyzed hydrogenation or Heck reactions. The catalytic stamps were soft lithographic stamps based on PDMS with embedded nanoscale palladium catalysts, prepared via block copolymer-based templating. Nanoscale chemical patterns were readily generated on the azide or alkene precursor surfaces simply by applying the Pd catalytic stamps and the reactive molecule, the molecular ink, to the surface, thanks to the highly localized catalytic transformations induced by the patterned, immobilized solid Pd catalysts. A series of successful postfunctionalization reactions on the resulting patterned surfaces further demonstrated the utility of this approach to construct novel designs of nanoarchitectures, with potentially unique and innovative properties.
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Affiliation(s)
- Hidenori Mizuno
- Department of Chemistry, University of Alberta, Alberta, T6G 2G2 Canada
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12
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Liu PH, Thébault P, Guenoun P, Daillant J. Easy Orientation of Diblock Copolymers on Self-Assembled Monolayers Using UV Irradiation. Macromolecules 2009. [DOI: 10.1021/ma9021357] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pang-Hung Liu
- CEA, IRAMIS, LIONS, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - Pascal Thébault
- CEA, IRAMIS, LIONS, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - Patrick Guenoun
- CEA, IRAMIS, LIONS, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - Jean Daillant
- CEA, IRAMIS, LIONS, CEA-Saclay, F-91191 Gif-sur-Yvette Cedex, France
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Farrell RA, Fitzgerald TG, Borah D, Holmes JD, Morris MA. Chemical interactions and their role in the microphase separation of block copolymer thin films. Int J Mol Sci 2009; 10:3671-3712. [PMID: 19865513 PMCID: PMC2769138 DOI: 10.3390/ijms10093671] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Accepted: 08/14/2009] [Indexed: 11/17/2022] Open
Abstract
The thermodynamics of self-assembling systems are discussed in terms of the chemical interactions and the intermolecular forces between species. It is clear that there are both theoretical and practical limitations on the dimensions and the structural regularity of these systems. These considerations are made with reference to the microphase separation that occurs in block copolymer (BCP) systems. BCP systems self-assemble via a thermodynamic driven process where chemical dis-affinity between the blocks driving them part is balanced by a restorative force deriving from the chemical bond between the blocks. These systems are attracting much interest because of their possible role in nanoelectronic fabrication. This form of self-assembly can obtain highly regular nanopatterns in certain circumstances where the orientation and alignment of chemically distinct blocks can be guided through molecular interactions between the polymer and the surrounding interfaces. However, for this to be possible, great care must be taken to properly engineer the interactions between the surfaces and the polymer blocks. The optimum methods of structure directing are chemical pre-patterning (defining regions on the substrate of different chemistry) and graphoepitaxy (topographical alignment) but both centre on generating alignment through favourable chemical interactions. As in all self-assembling systems, the problems of defect formation must be considered and the origin of defects in these systems is explored. It is argued that in these nanostructures equilibrium defects are relatively few and largely originate from kinetic effects arising during film growth. Many defects also arise from the confinement of the systems when they are 'directed' by topography. The potential applications of these materials in electronics are discussed.
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Affiliation(s)
- Richard A. Farrell
- Department of Chemistry, University College Cork, Cork, Ireland; E-Mails: (R.A.F.); (T.G.F.); (D.B.); (J.D.H.)
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
- Tyndall National Institute, The Maltings, Cork, Ireland
| | - Thomas G. Fitzgerald
- Department of Chemistry, University College Cork, Cork, Ireland; E-Mails: (R.A.F.); (T.G.F.); (D.B.); (J.D.H.)
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
- Intel Ireland, Leixlip, Co. Kildare, Ireland
| | - Dipu Borah
- Department of Chemistry, University College Cork, Cork, Ireland; E-Mails: (R.A.F.); (T.G.F.); (D.B.); (J.D.H.)
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
| | - Justin D. Holmes
- Department of Chemistry, University College Cork, Cork, Ireland; E-Mails: (R.A.F.); (T.G.F.); (D.B.); (J.D.H.)
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
- Tyndall National Institute, The Maltings, Cork, Ireland
| | - Michael A. Morris
- Department of Chemistry, University College Cork, Cork, Ireland; E-Mails: (R.A.F.); (T.G.F.); (D.B.); (J.D.H.)
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
- Tyndall National Institute, The Maltings, Cork, Ireland
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Iqbal P, Critchley K, Attwood D, Tunnicliffe D, Evans SD, Preece JA. Chemical manipulation by X-rays of functionalized thiolate self-assembled monolayers on Au. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13969-13976. [PMID: 19360937 DOI: 10.1021/la802244a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The chemical modification caused by prolonged exposure to X-rays on a series of para-substituted phenyl moieties (-NO2, -CN, -CHO, -COOH, -CO2Me, and -CO2(1)Bu) at the surface of thiolate-Au self-assembled monolayers (SAMs) has been investigated by X-ray photoelectron spectroscopy (XPS). Furthermore, the influence that the phenyl group has on the chemical modification induced by the X-ray irradiation on the SAMs was investigated by comparing the XPS results obtained from irradiation on a NO2-aromatic-terminated SAM (6-(4-nitro-phenoxy)-hexane-1-thiolate (NPHT)) and NO2-aliphatic-terminated SAM (thioacetic acid S-(12-nitrododecyl) ester (TNDDE)). The NPHT and TNDDE SAMs have been shown to behave differently to X-ray exposure. The irradiation of the NPHT SAM led to the reduction of the nitro (-NO2) moiety to the amine (-NH2) moiety, as shown by the decrease in the intensity of the N 1s photoelectron peak for -NO2 (406 eV) in the XPS spectra with the concomitant increase in the N 1s photoelectron peak for -NH2 (399 eV). On the TNDDE SAM, XPS showed the -NO2 photoelectron peak again decreasing with prolonged X-ray irradiation whereas no peak was observed at 399 eV; therefore, the -NO2 moieties are selectively cleaved. No change was observed on the other functionalized monolayers apart from the -CO2(t)Bu-functionalized monolayer, where after 100 min of X-ray irradiation approximately 11% of the carbon content was lost. The S 2p and O 1s spectra remained unchanged during the irradiation suggesting the conversion of the -CO2(t)Bu to the -COOH moiety, although the conversion was not complete because the tertiary butyl moiety contributes 25% to the total carbon content of the SAM. Also, there was no evidence of the molecules desorbing from the substrate for any of the SAMs studied during the X-ray irradiation as shown by no change in the S 2p and C 1s XPS spectra taken during the X-ray irradiation.
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Affiliation(s)
- P Iqbal
- School of Chemistry, The University of Birmingham, Edgbaston, Birmingham B15 277T, UK
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Yoshino N, Nakajima K, Nakamura K, Kondo Y, Ohashi K, Nihei T, Saito M, Teranaka T. Synthesis of bone formation deriving biosilanes. Colloids Surf B Biointerfaces 2008; 66:71-6. [PMID: 18586469 DOI: 10.1016/j.colsurfb.2008.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Accepted: 05/17/2008] [Indexed: 11/18/2022]
Abstract
Six silane coupling agents having amide group (biosilanes) were synthesized with the aim to construct the material surface that allows cells to be compatible with it without their destruction. These agents were expected to make a soft landing to cytoplasm through the hydrogen bonding between their amide groups and cells. Evaluations of cell affinity using glass substrates modified with the synthesized biosilanes revealed that many cells remain on the modified glass plate. In addition, the implantation into the body of immunodeficient mouse of a composite material composed of porous hydroxyapatite and osteoblast showed the formation of a bone-like structure.
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Affiliation(s)
- Norio Yoshino
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 12-1 Ichigaya-Funagawara, Shinjuku, Tokyo 162-0826, Japan.
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Iqbal P, Critchley K, Bowen J, Attwood D, Tunnicliffe D, Evans SD, Preece JA. Fabrication of a nanoparticle gradient substrate by thermochemical manipulation of an ester functionalized SAM. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b712687e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Miyake T, Tanii T, Kato K, Hosaka T, Kanari Y, Sonobe H, Ohdomari I. Nanopatterning of hydroxy-terminated self-assembled monolayer taking advantage of terminal group modification. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.05.074] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Ye T, McArthur EA, Borguet E. Mechanism of UV Photoreactivity of Alkylsiloxane Self-Assembled Monolayers. J Phys Chem B 2005; 109:9927-38. [PMID: 16852200 DOI: 10.1021/jp0474273] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A molecular level understanding of the photoreactivity of self-assembled monolayers (SAMs) becomes increasingly important as the spatial resolution starts to be limited by the size of the resist and the spatial extent of the photochemical reactions in photoresist micropatterning. To this end, a number of surface characterization techniques were combined to understand the reactive agents, reactive sites, kinetics, and reaction pathways in the UV photoreactivity of octadecylsiloxane (ODS) SAMs. Quantitative analysis of our results provides evidence that ground state atomic oxygen is the primary reactive agent for the UV degradation of ODS SAMs. UV degradation, which follows zero-order kinetics, results in the scission of alkyl chains instead of the siloxane headgroups. Our results suggest that the top of the ODS SAMs is the preferential reactive site. Using a novel, highly surface sensitive technique, fluorescence labeling of surface species, we identified the presence of submonolayer quantities chemical functional groups formed by the UV degradation. These groups are intermediates in a proposed mechanism based on hydrogen abstraction.
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Affiliation(s)
- Tao Ye
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
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19
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Mendes PM, Preece JA. Precision chemical engineering: integrating nanolithography and nanoassembly. Curr Opin Colloid Interface Sci 2004. [DOI: 10.1016/j.cocis.2004.06.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Walsh JD, Miller AF. NMR Shieldings and Electron Correlation Reveal Remarkable Behavior on the Part of the Flavin N5 Reactive Center. J Phys Chem B 2002. [DOI: 10.1021/jp022005j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph D. Walsh
- Departments of Biophysics and Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, and Department of Chemistry, The University of Kentucky, Lexington, Kentucky 40506
| | - Anne-Frances Miller
- Departments of Biophysics and Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, and Department of Chemistry, The University of Kentucky, Lexington, Kentucky 40506
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Yang XM, Peters RD, Nealey PF. Imaging the Substrate/Film Interface of Thin Films of Diblock Copolymers on Chemically Patterned Surfaces. Macromolecules 2002. [DOI: 10.1021/ma0111966] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao M. Yang
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
| | - Richard D. Peters
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
| | - Paul F. Nealey
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
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Peters RD, Yang XM, Nealey PF. Morphology of Thin Films of Diblock Copolymers on Surfaces Micropatterned with Regions of Different Interfacial Energy. Macromolecules 2002. [DOI: 10.1021/ma011003e] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard D. Peters
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
| | - Xiao M. Yang
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
| | - Paul F. Nealey
- Department of Chemical Engineering and Center for Nanotechnology, University of Wisconsin, Madison, Wisconsin 53706
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Fryer DS, Peters RD, Kim EJ, Tomaszewski JE, de Pablo JJ, Nealey PF, White CC, Wu WL. Dependence of the Glass Transition Temperature of Polymer Films on Interfacial Energy and Thickness. Macromolecules 2001. [DOI: 10.1021/ma001932q] [Citation(s) in RCA: 436] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Sun G, Kertesz M. Identification for IPR Isomers of Fullerene C82 by Theoretical 13C NMR Spectra Calculated by Density Functional Theory. J Phys Chem A 2001. [DOI: 10.1021/jp004544z] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangyu Sun
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, D.C. 20057-1227, USA
| | - Miklos Kertesz
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, D.C. 20057-1227, USA
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25
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Werst DW, Vinokur EI. Radiation Damage of Alkoxy and Siloxy Ligands Bonded to Silica. J Phys Chem B 2001. [DOI: 10.1021/jp003806u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. W. Werst
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
| | - E. I. Vinokur
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
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26
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Yang XM, Peters RD, Nealey PF, Solak HH, Cerrina F. Guided Self-Assembly of Symmetric Diblock Copolymer Films on Chemically Nanopatterned Substrates. Macromolecules 2000. [DOI: 10.1021/ma001326v] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Combining advanced lithographic techniques and self-assembly of thin films of diblock copolymers to produce templates for nanofabrication. ACTA ACUST UNITED AC 2000. [DOI: 10.1116/1.1313572] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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