1
|
Luxford TFM, Fedor J, Kočišek J. Electron Energy Loss Processes in Methyl Methacrylate: Excitation and Bond Breaking. J Phys Chem A 2023; 127:2731-2741. [PMID: 36930039 PMCID: PMC10068740 DOI: 10.1021/acs.jpca.2c09077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Details of electron-induced chemistry of methyl methacrylate (MMA) upon complexation are revealed by combining gas-phase 2D electron energy loss spectroscopy with electron attachment spectroscopy of isolated MMA and its clusters. We show that even though isolated MMA does not form stable parent anions, it efficiently thermalizes the incident electrons via intramolecular vibrational redistribution, leading to autodetachment of slow electrons. This autodetachment channel is reduced in clusters due to intermolecular energy transfer and stabilization of parent molecular anions. Bond breaking via dissociative electron attachment leads to an extensive range of anion products. The dominant OCH3- channel is accessible via core-excited resonances with threshold above 5 eV, despite the estimated thermodynamic threshold below 3 eV. This changes in clusters, where MnOCH3- anions are observed in a lower-lying resonance due to neutral dissociation of the 1(n, π*) state and electron self-scavenging. The present findings have implications for electron-induced chemistry in lithography with poly(methyl methacrylate).
Collapse
Affiliation(s)
- Thomas F M Luxford
- J. Heyrovský Institute of Physical Chemistry of CAS, Dolejškova 3, 18223 Prague, Czech Republic
| | - Juraj Fedor
- J. Heyrovský Institute of Physical Chemistry of CAS, Dolejškova 3, 18223 Prague, Czech Republic
| | - Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry of CAS, Dolejškova 3, 18223 Prague, Czech Republic
| |
Collapse
|
2
|
Pinaeva U. Effect of electron-beam irradiation on poly(2-hydroxyethyl methacrylate). Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
|
3
|
Yabagi JA, Jameel MH, Jabbar AH, Kimpa MI, Qays Malik R, Xin SP, Babakatcha N, Ladan MB, Hamzah MQ, Agam M, Hessien MM, Mersal GAM. Effect of laser irradiated silver doped polystyrene/polyethylene terephthalate (PET) thin film for solar cell applications. RSC Adv 2022; 12:32949-32955. [DOI: 10.1039/d2ra04777b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 11/06/2022] [Indexed: 11/18/2022] Open
Abstract
In the current research, the resist action of silver-doped polystyrene/polyethylene terephthalate (PET) solar thin film towards laser irradiation was observed.
Collapse
Affiliation(s)
- Jibrin Alhaji Yabagi
- Departments of Physics, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University Lapai, P.M.B 11, Lapai, Niger State, Nigeria
| | - Muhammad Hasnain Jameel
- Department of Physics and Chemistry, University Tun Hussein Onn Malaysia, 84600 Pagoh, Muar, Johor, Malaysia
| | - Abdullah Hasan Jabbar
- Optical Department, College of Medical and Health Technology, Sawa University, Ministry of Higher Education and Scientific Research, Samawah, Al-Muthanaa, Iraq
| | - Mohammed Isah Kimpa
- Department of Physics, School of Physical Sciences, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria
| | - Rami Qays Malik
- Medical Instrumentation Techniques Engineering Department, Al-Mustaqbal University College, Babylon, Iraq
| | - Sim Pei Xin
- Department of Physics and Chemistry, University Tun Hussein Onn Malaysia, 84600 Pagoh, Muar, Johor, Malaysia
| | - Ndanusa Babakatcha
- Departments of Physics, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University Lapai, P.M.B 11, Lapai, Niger State, Nigeria
| | - Muhammad Bello Ladan
- Departments of Physics, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University Lapai, P.M.B 11, Lapai, Niger State, Nigeria
| | - Maytham Qabel Hamzah
- Department of Physics and Chemistry, University Tun Hussein Onn Malaysia, 84600 Pagoh, Muar, Johor, Malaysia
- Directorate of Education Al-Muthanna, Ministry of Education, Republic of Iraq
| | - MohdArif Agam
- Department of Physics and Chemistry, University Tun Hussein Onn Malaysia, 84600 Pagoh, Muar, Johor, Malaysia
| | - M. M. Hessien
- Department of Chemistry, College of Science, Taif University, P.O Box 11099, Taif, 21944, Saudi Arabia
| | - Gaber A. M. Mersal
- Department of Chemistry, College of Science, Taif University, P.O Box 11099, Taif, 21944, Saudi Arabia
| |
Collapse
|
4
|
Daqiqeh Rezaei S, Ho J, Wang T, Ramakrishna S, Yang JKW. Direct Color Printing with an Electron Beam. NANO LETTERS 2020; 20:4422-4429. [PMID: 32392073 DOI: 10.1021/acs.nanolett.0c01191] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The direct patterning of colors using the bombardment of a focused beam of electrons onto a thin-film stack consisting of poly(methyl methacrylate) coated with a thin nickel film is demonstrated. This direct electron-beam color printing approach creates variations in the height of a Fabry-Perot (FP) cavity, resulting directly in a color print without the need for prepatterned substrates, distinct from some direct laser writing methods. Notably, the resolution of the color prints is defined by the electron beam. Height measurements with ∼5 nm accuracy through color image analysis of an electron-beam-patterned FP cavity were carried out. This technique also introduces a reflectance-based measurement of the point exposure function of a focused electron beam, aiding in rapid proximity effect corrections. In addition, the grayscale lithographic nature of this process was used to produce blazed gratings and could enable the fabrication of other 2.5D nanostructures with precise height control.
Collapse
Affiliation(s)
- Soroosh Daqiqeh Rezaei
- Nanofabrication Department, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634 Singapore
- Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 117575 Singapore
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Jinfa Ho
- Nanofabrication Department, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634 Singapore
| | - Tao Wang
- Nanofabrication Department, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634 Singapore
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, 117575 Singapore
| | - Joel K W Yang
- Nanofabrication Department, Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634 Singapore
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| |
Collapse
|
5
|
Huang HT, Ho GY, Wei ZH. Thermoelectric Effects of Nanogaps between Two Tips. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703695. [PMID: 29473298 DOI: 10.1002/smll.201703695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/22/2017] [Indexed: 06/08/2023]
Abstract
This study designs a microscaled thermoelectric component featuring a nanogap of varying size (133-900 nm) between the tips of the component. Electricity and heat are transmitted between the gap of the tips through the thermionic emission of electrons. Because the gaps exhibit a discontinuous structure, the phonon's contribution to thermal conductivity can be virtually neglected, thereby enhancing the thermoelectric figure of merit (ZT) of the designed thermoelectric component. The experimental results reveal that a narrow tip gap generates stronger thermoelectric effects, with Seebeck voltage and Seebeck coefficient being respectively, one and two orders of magnitude greater than those of the thermoelectric effects of nanowires. The thermoelectric figure of merit without considering the contributions from other heat carriers is higher than the value of thermoelectric devices developed in recent years. For a set of asymmetrical thin film electrodes of differing sizes, the thermoelectric effects generated in the heating process of large thin films are stronger than those of small thin films. Furthermore, adding nanoparticles to the nanogap facilitate the thermionic emission of electrons, in which electrons hop from the hot end to the cold end, thereby intensifying the thermoelectric effects of the nanogap.
Collapse
Affiliation(s)
- Hao-Ting Huang
- Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu, 30013, Taiwan
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Guan-You Ho
- Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Zung-Hang Wei
- Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu, 30013, Taiwan
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| |
Collapse
|
6
|
Bi K, Xiang Q, Chen Y, Shi H, Li Z, Lin J, Zhang Y, Wan Q, Zhang G, Qin S, Zhang X, Duan H. Direct patterning of highly-conductive graphene@copper composites using copper naphthenate as a resist for graphene device applications. NANOSCALE 2017; 9:16755-16763. [PMID: 29072744 DOI: 10.1039/c7nr05779b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report an electron-beam lithography process to directly fabricate graphene@copper composite patterns without involving metal deposition, lift-off and etching processes using copper naphthenate as a high-resolution negative-tone resist. As a commonly used industrial painting product, copper naphthenate is extremely cheap with a long shelf time but demonstrates an unexpected patterning resolution better than 10 nm. With appropriate annealing under a hydrogen atmosphere, the produced graphene@copper composite patterns show high conductivity of ∼400 S cm-1. X-ray diffraction, conformal Raman spectroscopy and X-ray photoelectron spectroscopy were used to analyze the chemical composition of the final patterns. With the properties of high resolution and high conductivity, the patterned graphene@copper composites could be used as conductive pads and interconnects for graphene electronic devices with ohmic contacts. Compared to common fabrication processes involving metal evaporation and lift-off steps, this pattern-transfer-free fabrication process using copper naphthenate resist is direct and simple but allows comparable device performance in practical device applications.
Collapse
Affiliation(s)
- Kaixi Bi
- School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Choi JH, Lee J, Moon SM, Kim YT, Park H, Lee CY. A Low-Energy Electron Beam Does Not Damage Single-Walled Carbon Nanotubes and Graphene. J Phys Chem Lett 2016; 7:4739-4743. [PMID: 27934200 DOI: 10.1021/acs.jpclett.6b02185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Scanning electron microscopy (SEM) is a principal tool for studying nanomaterials, including carbon nanotubes and graphene. Imaging carbon nanomaterials by SEM, however, increases the disorder mode (D-mode) in their Raman spectra. Early studies, which relied on ambiguous ensemble measurements, claimed that the D-mode indicates damage to the specimens by a low-energy electron beam (e-beam). This claim has been accepted by the nanomaterials community for more than a decade without thorough examination. Here we demonstrate that a low-energy e-beam does not damage carbon nanomaterials. By performing measurements on single nanotubes, we independently examined the following factors: (1) the e-beam irradiation itself, (2) the e-beam-deposited hydrocarbon, and (3) the amorphous carbon deposited during synthesis of the material. We concluded that the e-beam-induced D-mode of both carbon nanotubes and graphene originates solely from the irradiated amorphous carbon and not from the e-beam itself or the hydrocarbon. The results of this study should help minimize potential ambiguities for researchers imaging a broad range of nanomaterials by electron microscopy.
Collapse
Affiliation(s)
- Jae Hong Choi
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Junghyun Lee
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Seung Min Moon
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Yun-Tae Kim
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Hyesung Park
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| | - Chang Young Lee
- School of Energy and Chemical Engineering, §School of Life Sciences, and ‡Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulju-gun, Ulsan 44919, Republic of Korea
| |
Collapse
|
8
|
Jin JE, Choi JH, Yun H, Jang HK, Lee BC, Choi A, Joo MK, Dettlaff-Weglikowska U, Roth S, Lee SW, Lee JW, Kim GT. Surface Modulation of Graphene Field Effect Transistors on Periodic Trench Structure. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18513-18518. [PMID: 27302334 DOI: 10.1021/acsami.6b02537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, graphene field effect transistors (FETs) were fabricated on a trench structure made by carbonized poly(methylmethacrylate) to modify the graphene surface. The trench-structured devices showed different characteristics depending on the channel orientation and the pitch size of the trenches as well as channel area in the FETs. Periodic corrugations and barriers of suspended graphene on the trench structure were measured by atomic force microscopy and electrostatic force microscopy. Regular barriers of 160 mV were observed for the trench structure with graphene. To confirm the transfer mechanism in the FETs depending on the channel orientation, the ratio of experimental mobility (3.6-3.74) was extracted from the current-voltage characteristics using equivalent circuit simulation. It is shown that the number of barriers increases as the pitch size decreases because the number of corrugations increases from different trench pitches. The noise for the 140 nm pitch trench is 1 order of magnitude higher than that for the 200 nm pitch trench.
Collapse
Affiliation(s)
- Jun Eon Jin
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Jun Hee Choi
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Hoyeol Yun
- Division of Quantum Phases and Device, School of Physics, Konkuk University , Seoul 143-701, South Korea
| | - Ho-Kyun Jang
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Byung Chul Lee
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Ajeong Choi
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Min-Kyu Joo
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University , Suwon, South Korea
| | | | - Siegmar Roth
- The Alan G. MacDiarmid Nano Tech Institute, The University of Texas at Dallas , Richardson, Texas 75080, United States
| | - Sang Wook Lee
- Division of Quantum Phases and Device, School of Physics, Konkuk University , Seoul 143-701, South Korea
| | - Jae Woo Lee
- ICT Convergence Technology for Health & Safety and Department of Electronics and Information Engineering, Korea University , 2511 Sejong-ro, Sejong, South Korea
| | - Gyu Tae Kim
- School of Electrical Engineering, Korea University , Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| |
Collapse
|
9
|
All-carbon based graphene field effect transistor with graphitic electrodes fabricated by e-beam direct writing on PMMA. Sci Rep 2015. [PMID: 26195033 PMCID: PMC4508849 DOI: 10.1038/srep12198] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A so called all-carbon based graphene field effect transistor (GFET) in which the electrodes are composed of graphite-like nano-sheets instead of metals in the traditional devices is fabricated by one-step e-beam direct writing (EBDW). It is also found that the graphite-like nano-sheets in electrodes are perpendicular to the channel graphene, which is confirmed by the transmission electron microscopy (HRTEM). The one-step fabrication of the carbonaceous electrodes is more convenient and lower-cost comparing to the preparation of traditional metal electrodes and can be applied to many other nano-electronic devices.
Collapse
|
10
|
Samardak A, Anisimova M, Samardak A, Ognev A. Fabrication of high-resolution nanostructures of complex geometry by the single-spot nanolithography method. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:976-986. [PMID: 25977869 PMCID: PMC4419585 DOI: 10.3762/bjnano.6.101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 03/25/2015] [Indexed: 06/04/2023]
Abstract
The paper presents a method for the high-resolution production of polymer nanopatterns with controllable geometrical parameters by means of a single-spot electron-beam lithography technique. The essence of the method entails the overexposure of a positive-tone resist, spin-coated onto a substrate where nanoscale spots are exposed to an electron beam with a dose greater than 0.1 pC per dot. A single-spot enables the fabrication of a nanoring, while a chain of spots placed at distance of 5-30 nm from each other allows the production of a polymer pattern of complex geometry of sub-10 nm resolution. We demonstrate that in addition to the naturally oxidized silicon substrates, gold-coated substrates can also successfully be used for the single-spot nanopattering technique. An explanation of the results related to the resist overexposure was demonstrated using Monte Carlo simulations. Our nanofabrication method significantly accelerates (up to 10 times) the fabrication rate as compared to conventional lithography on positive-tone resist. This technique can be potentially employed in the electronics industry for the production of nanoprinted lithography molds, etching masks, nanoelectronics, nanophotonics, NEMS and MEMS devices.
Collapse
Affiliation(s)
- Alexander Samardak
- Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
| | - Margarita Anisimova
- Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
| | - Aleksei Samardak
- Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
| | - Alexey Ognev
- Laboratory of Thin Film Technologies, School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
| |
Collapse
|
11
|
Zhang J, Cao K, Wang XS, Cui B. Metal-carbonyl organometallic polymers, PFpP, as resists for high-resolution positive and negative electron beam lithography. Chem Commun (Camb) 2015; 51:17592-5. [DOI: 10.1039/c5cc07117h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-carbonyl organometallic polymers, PFpP, can function as high-resolution resists for electron beam lithography.
Collapse
Affiliation(s)
- J. Zhang
- Department of Electrical and Computer Engineering
- Waterloo Institute for Nanotechnology (WIN)
- University of Waterloo
- Waterloo
- Canada
| | - K. Cao
- Department of Chemistry
- Waterloo Institute for Nanotechnology (WIN)
- University of Waterloo
- Waterloo
- Canada
| | - X. S. Wang
- Department of Chemistry
- Waterloo Institute for Nanotechnology (WIN)
- University of Waterloo
- Waterloo
- Canada
| | - B. Cui
- Department of Electrical and Computer Engineering
- Waterloo Institute for Nanotechnology (WIN)
- University of Waterloo
- Waterloo
- Canada
| |
Collapse
|
12
|
Olle M, Ceballos G, Serrate D, Gambardella P. Yield and shape selection of graphene nanoislands grown on Ni(111). NANO LETTERS 2012; 12:4431-4436. [PMID: 22901016 DOI: 10.1021/nl300897m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The catalytic decomposition of hydrocarbons on transition-metal surfaces has attracted increasing interest as a method to prepare high quality graphene layers. Here, we study the optimal reaction path for the preparation of graphene nanoislands of selected shape using controlled decomposition of propene on Ni(111). Scanning tunneling microscopy performed at different stages of the reaction provides insight into the temperature and dose-dependent growth of graphene islands, which precedes the formation of monolayer graphene. The effect of postreaction annealing on the morphology of the islands is studied. By adjusting the initial propene dose, reaction temperature, and postannealing procedure, islands with a triangular or hexagonal shape can be selectively obtained.
Collapse
Affiliation(s)
- M Olle
- Catalan Institute of Nanotechnology (ICN) and Universitat Autònoma de Barcelona, UAB Campus, E-08193 Bellaterra (Barcelona), Spain.
| | | | | | | |
Collapse
|
13
|
Morarescu R, Shen H, Vallée RAL, Maes B, Kolaric B, Damman P. Exploiting the localized surface plasmon modes in gold triangular nanoparticles for sensing applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30944k] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Duan H, Berggren KK. Directed self-assembly at the 10 nm scale by using capillary force-induced nanocohesion. NANO LETTERS 2010; 10:3710-6. [PMID: 20704183 DOI: 10.1021/nl102259s] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We demonstrated a new nanoassembly strategy based on capillary force-induced cohesion of high-aspect ratio nanostructures made by electron-beam lithography. Using this strategy, ordered complex pattern were fabricated from individual nanostructures at the 10 nm length scale. This method enables the formation of complex designed networks from a sparse array of nanostructures, suggesting a number of potential applications in fabrication of nanodevices, nanopatterning, and fluid-flow investigations.
Collapse
Affiliation(s)
- Huigao Duan
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | |
Collapse
|
15
|
Cell culture on MEMS platforms: a review. Int J Mol Sci 2009; 10:5411-5441. [PMID: 20054478 PMCID: PMC2802002 DOI: 10.3390/ijms10125411] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2009] [Revised: 12/13/2009] [Accepted: 12/16/2009] [Indexed: 01/09/2023] Open
Abstract
Microfabricated systems provide an excellent platform for the culture of cells, and are an extremely useful tool for the investigation of cellular responses to various stimuli. Advantages offered over traditional methods include cost-effectiveness, controllability, low volume, high resolution, and sensitivity. Both biocompatible and bio-incompatible materials have been developed for use in these applications. Biocompatible materials such as PMMA or PLGA can be used directly for cell culture. However, for bio-incompatible materials such as silicon or PDMS, additional steps need to be taken to render these materials more suitable for cell adhesion and maintenance. This review describes multiple surface modification strategies to improve the biocompatibility of MEMS materials. Basic concepts of cell-biomaterial interactions, such as protein adsorption and cell adhesion are covered. Finally, the applications of these MEMS materials in Tissue Engineering are presented.
Collapse
|