1
|
Spalenza PEP, de Souza FAL, Amorim RG, Scheicher RH, Scopel WL. A high density nanopore 3-triangulene kagome lattice. NANOSCALE 2024; 16:9911-9916. [PMID: 38686534 DOI: 10.1039/d4nr00910j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Nanopore-containing two-dimensional materials have been explored for a wide range of applications including filtration, sensing, catalysis, energy storage and conversion. Triangulenes have recently been experimentally synthesized in a variety of sizes. In this regard, using these systems as building blocks, we theoretically examined 3-triangulene kagome crystals with inherent holes of ∼12 Å diameter and a greater density array of nanopores (≥1013 cm-2) compared to conventional 2D systems. The energetic, electronic, and transport properties of pristine and B/N-doped 3-triangulene kagome crystals were evaluated through a combination of density functional theory and non-equilibrium Green's function method. The simulated scanning tunneling microscopy images clearly capture electronic perturbation around the doped sites, which can be used to distinguish the pristine system from the doped systems. The viability of precisely controlling the band structure and transport properties by changing the type and concentration of doping atoms is demonstrated. The findings presented herein can potentially widen the applicability of these systems that combine unique electronic properties and intrinsically high-density pores, which can pave the way for the next generation of nanopore-based devices.
Collapse
Affiliation(s)
| | | | - Rodrigo G Amorim
- Departamento de Física, ICEx, Universidade Federal Fluminense - UFF, Volta Redonda, RJ, Brazil.
| | - Ralph H Scheicher
- Division of Materials Theory, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
| | - Wanderlã Luis Scopel
- Departamento de Física, Universidade Federal do Espírito Santo - UFES, Vitória, ES, Brazil.
| |
Collapse
|
2
|
Ren C, Bai L, Shi R, Zhang J, Zhang X, Chen C. Measurement of current distribution using infrared thermography. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:034713. [PMID: 37012822 DOI: 10.1063/5.0137203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/07/2023] [Indexed: 06/19/2023]
Abstract
Current distribution measurement methods are widely used in medical examinations, predicting faults in semiconductor devices and assessing structural integrity. Several methods for measuring current distribution are available, such as electrode arrays, coils, and magnetic sensors. However, these measurement methods are unable to obtain images of current distribution with high spatial resolution. Therefore, there is a need to develop a non-contact method to measure current distribution that is capable of capturing images with high spatial resolution. In this study, a non-contact current distribution measurement method based on infrared thermography is proposed. The method uses thermal variations to quantify the current amplitude and reconstructs the current direction based on the passivity of the electric field. For quantification of low frequency current amplitude, the experimental results show that the method can provide accurate current measurement results, for example, at the power frequency (50 Hz), in the range of 1.05-3.45 A, its relative error can be improved to ±3.66% when the calibration fitting method is used. For the high-frequency current, an effective estimate of the current amplitude is obtained using the first-order derivative of temperature variation. When applied to the eddy current detection (256 KHz), it achieves a high-resolution image of the current distribution, and the effectiveness of the method is verified through simulation experiments. The experimental results show that the proposed method not only measures the current amplitude accurately but also improves the spatial resolution in acquiring two-dimensional current distribution images.
Collapse
Affiliation(s)
- Chao Ren
- School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Libing Bai
- School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ruilong Shi
- Equipment Supplies Center of China Petroleum Pipeline Inspection Technologies Company, Hebei 065000, China
| | - Jie Zhang
- School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Xu Zhang
- School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Cong Chen
- School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| |
Collapse
|
3
|
Li Z, Nie G, Chen Z, Li D, Tan D, Xu H, Liu Y. Polarization-sensitive switchable display through critical coupling between graphene and a quasi-BIC. Phys Chem Chem Phys 2022; 24:29594-29600. [PMID: 36448605 DOI: 10.1039/d2cp05172a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Enhanced light-matter interaction of a local field is of prime importance in optics as it can improve the performance of nanophotonic devices. Such enhancement can be achieved by utilizing the optical bound states in the continuum (BICs). In this study, a dielectric metasurface is proposed that could enhance the light-matter interactions in graphene. A symmetry-protected BIC was observed in such a metasurface, which could transform into a quasi-BIC with a high quality (Q-) factor when the in-plane symmetry is broken. As the graphene monolayer was introduced into the system, its absorption was enhanced by the quasi-BIC resonance. By optimizing the graphene Fermi energy and the asymmetry parameter of the metasurface to satisfy the critical-coupling condition, a tunable absorber could be achieved. The absorbing intensity could be efficiently modulated by varying the polarization direction of the incident light, the maximum difference of which was up to 95.4%. Also, further investigation showed that such a feature indicates potential application in digital switches and image displays, which could be switched by incident polarization only, and therefore without dependence on an additional structural change.
Collapse
Affiliation(s)
- Zonglin Li
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China. .,Hunan Provincial Key Laboratory of Intelligent Sensors and New Sensor Materials, Xiangtan, 411201, Hunan, China
| | - Guozheng Nie
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China. .,Hunan Provincial Key Laboratory of Intelligent Sensors and New Sensor Materials, Xiangtan, 411201, Hunan, China.,School of Microelectronics and Physics, Hunan University of Technology and Business, Changsha, 410205, China
| | - Zhiquan Chen
- School of Microelectronics and Physics, Hunan University of Technology and Business, Changsha, 410205, China
| | - Deqiong Li
- College of Science, Hunan University of Technology and Business, Changsha, 410205, China
| | - Diwen Tan
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China. .,Hunan Provincial Key Laboratory of Intelligent Sensors and New Sensor Materials, Xiangtan, 411201, Hunan, China
| | - Hui Xu
- School of Microelectronics and Physics, Hunan University of Technology and Business, Changsha, 410205, China
| | - Yunxin Liu
- School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China. .,Hunan Provincial Key Laboratory of Intelligent Sensors and New Sensor Materials, Xiangtan, 411201, Hunan, China.,School of Microelectronics and Physics, Hunan University of Technology and Business, Changsha, 410205, China
| |
Collapse
|
4
|
Jena MK, Pathak B. Identification of DNA nucleotides by conductance and tunnelling current variation through borophene nanogaps. Phys Chem Chem Phys 2022; 24:21427-21439. [PMID: 36047510 DOI: 10.1039/d2cp02093a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rapid and inexpensive DNA sequencing is critical to biomedical research and healthcare for the accomplishment of personalized medicine. Solid-state nanopores and nanogaps have marshalled themselves in the fascinating paradigm of nano-research since the advent of its application in DNA sequencing by analyzing the quantum conductance and electric current signals. In this study, the feasibility of the considered borophene nanogaps for DNA sequencing purposes via the electronic tunnelling current approach was investigated by utilizing combined density functional theory with non-equilibrium Green's function (DFT-NEGF) techniques. The interaction energy (Ei) and the charge density difference (CDD) plots exploit the charge modulation around the nanogap edges due to the presence of each nucleotide. Our results revealed a distinct variation in the tunnelling conductance, as a characteristic fingerprint of each nucleotide at the Fermi level. The calculated tunnelling current variation across the nanogap under an applied bias voltage was also significant due to the effective coupling of nucleotides with the electrode edges. The current was in the picoampere (pA) range, which was fairly higher than the electrical background noise and also experimentally detectable by the canning tunnelling microscopy (STM) technique. Our findings demonstrated that in the borophene nanopore vs. nanogap scenario, the nanogap has several advantages and is a more promising nanobiosensor. Moreover, we also compared our results with various previous experimental and theoretical reports on nanogaps as well as nanopores for gaining better insights.
Collapse
Affiliation(s)
- Milan Kumar Jena
- Department of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India.
| | - Biswarup Pathak
- Department of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India.
| |
Collapse
|
5
|
Kumawat RL, Pathak B. Conductance and tunnelling current characteristics for individual identification of synthetic nucleic acids with a graphene device. Phys Chem Chem Phys 2022; 24:15756-15766. [PMID: 35757959 DOI: 10.1039/d2cp01255c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on combined density functional theory and non-equilibrium Green's function quantum transport studies, in the present work we have demonstrated the quantum interference (QI) effect on the transverse conductance of Hachimoji (synthetic) nucleic acids when placed between the oxygen-terminated zigzag graphene nanoribbon (O-ZGNR) nanoelectrodes. We theorize that the QI effect could be well preserved in π-π coupling between a target nucleobase molecule and the carbon-based nanoelectrodes. Our study indicates that the QI effect, such as anti-resonance or Fano-resonance, affects the variation of transverse conductance depending on the nucleobase conformation. Furthermore, a variation of up to 2-5 orders of magnitude is observed in the conductance upon rotation for all the nucleobases. The current-voltage (I-V) characteristics results suggest a distinct variation in the electronic tunnelling current across the proposed nanogap device for all five nucleobases with the applied bias voltage ranges from 0.1-1.0 V. The different rotation angles keep the distinct feature of the nucleobases in both transverse conductance and tunnelling current features. Both features could be utilized in an accurate synthetic DNA sequencing device.
Collapse
Affiliation(s)
- Rameshwar L Kumawat
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh, 453552, India. .,Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry, and School of Computational Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
| | - Biswarup Pathak
- Department of Chemistry, Indian Institute of Technology (IIT) Indore, Indore, Madhya Pradesh, 453552, India.
| |
Collapse
|
6
|
Theoretical insights into the diverse and tunable charge transport behavior of stilbene-based single-molecule junctions. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
7
|
Zhao X, Li Y, Sun R, Fan Y, Mu X, Wang Y, Shi C, Ma C. Electrical potential-assisted DNA-RNA hybridization for rapid microRNA extraction. Anal Bioanal Chem 2022; 414:3529-3539. [PMID: 35229173 DOI: 10.1007/s00216-022-03979-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/08/2022] [Accepted: 02/14/2022] [Indexed: 01/15/2023]
Abstract
Analysis of microRNAs (miRNAs) is important in cancer diagnostics and therapy. Conventional methods used to extract miRNA for analysis are generally time-consuming. A novel approach for rapid and sensitive extraction of miRNAs is urgently need for clinical applications. Herein, a novel strategy based on electrical potential-assisted DNA-RNA hybridization was designed for miRNA extraction. The entire extraction process was accomplished in approximately 3 min, which is much shorter than the commercial adsorption column method, at more than 60 min, or the TRIzol method, at more than 90 min. Additionally, the method offered the advantages of simplicity and specificity during the extraction process by electrical potential-assisted hybridization of single-stranded DNA and RNA. Taking let-7a as an example, satisfactory results were achieved for miRNA extraction in serum, demonstrating the applicability in miRNA nucleic acid amplification.
Collapse
Affiliation(s)
- Xiaoli Zhao
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Shandong, 266042, Qingdao, People's Republic of China
| | - Yong Li
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Shandong, 266042, Qingdao, People's Republic of China
| | - Ritong Sun
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Shandong, 266042, Qingdao, People's Republic of China
| | - Yaofang Fan
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Shandong, 266042, Qingdao, People's Republic of China
| | - Xiaofeng Mu
- Clinical Laboratory, Qingdao Central Hospital, The Second Affiliated Hospital of Medical College of Qingdao University, Qingdao, 266042, China
| | - Ye Wang
- Clinical Laboratory, Qingdao Central Hospital, The Second Affiliated Hospital of Medical College of Qingdao University, Qingdao, 266042, China
| | - Chao Shi
- Qingdao Nucleic Acid Rapid Testing International Science and Technology Cooperation Base, College of Life Sciences, Department of Pathogenic Biology, School of Basic Medicine, the Clinical Laboratory Department of the Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, People's Republic of China
| | - Cuiping Ma
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Shandong, 266042, Qingdao, People's Republic of China.
| |
Collapse
|
8
|
Spalenza P, de Souza FAL, Amorim RG, Scopel WL. Gas sensing detection in carbon phosphide monolayer: Improving CO x sensitivity through B-doping. Phys Chem Chem Phys 2022; 24:22067-22072. [DOI: 10.1039/d2cp02603a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 2D materials engineering challenge is searching for a nanodevice capable to detect and distinguish gas molecules through electrical identification. Herein, the B-doped carbon phosphide monolayer (B-doped γ-CP) was explored...
Collapse
|
9
|
Qiu H, Zhou W, Guo W. Nanopores in Graphene and Other 2D Materials: A Decade's Journey toward Sequencing. ACS NANO 2021; 15:18848-18864. [PMID: 34841865 DOI: 10.1021/acsnano.1c07960] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanopore techniques offer a low-cost, label-free, and high-throughput platform that could be used in single-molecule biosensing and in particular DNA sequencing. Since 2010, graphene and other two-dimensional (2D) materials have attracted considerable attention as membranes for producing nanopore devices, owing to their subnanometer thickness that can in theory provide the highest possible spatial resolution of detection. Moreover, 2D materials can be electrically conductive, which potentially enables alternative measurement schemes relying on the transverse current across the membrane material itself and thereby extends the technical capability of traditional ionic current-based nanopore devices. In this review, we discuss key advances in experimental and computational research into DNA sensing with nanopores built from 2D materials, focusing on both the ionic current and transverse current measurement schemes. Challenges associated with the development of 2D material nanopores toward DNA sequencing are further analyzed, concentrating on lowering the noise levels, slowing down DNA translocation, and inhibiting DNA fluctuations inside the pores. Finally, we overview future directions of research that may expedite the emergence of proof-of-concept DNA sequencing with 2D material nanopores.
Collapse
Affiliation(s)
- Hu Qiu
- State Key Laboratory of Mechanics and Control of Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices of MOE, Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wanqi Zhou
- State Key Laboratory of Mechanics and Control of Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices of MOE, Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wanlin Guo
- State Key Laboratory of Mechanics and Control of Mechanical Structures and Key Laboratory for Intelligent Nano Materials and Devices of MOE, Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| |
Collapse
|
10
|
Kiakojouri A, Frank I, Nadimi E. In-plane graphene/h-BN/graphene heterostructures with nanopores for electrical detection of DNA nucleotides. Phys Chem Chem Phys 2021; 23:25126-25135. [PMID: 34729571 DOI: 10.1039/d1cp03597e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The in-plane heterostructure of graphene and h-BN has unique physical and electrical characteristics, which can be exploited for single-molecule DNA sequencing. On this account, we propose a nanostructure based on a nanopore in graphene/h-BN/graphene heterostructures as a viable approach for in-plane electrical detection. The insulating h-BN layer changes the charge transport to the quantum tunneling regime, which is very sensitive to the electrostatic interactions induced by nucleotides during their translocation through the nanopore. Density functional theory (DFT) is utilized to study the membrane/nanopore interactions as well as their interactions with different nucleotides (dAMP, dGMP, dCMP, and dTMP). The results indicate that the nucleotides show stronger interactions with nanopores in h-BN rather than nanopores in pristine graphene. For the calculation of electronic transport, non-equilibrium Green's function (NEGF) formalism at the first principles level is employed. The in-plane currents at different applied voltages are calculated in the presence of different nucleotides in the nanopore. The sensitivity of the proposed nanostructure towards different nucleotides is measured based on the current modulation induced by each nucleotide. The graphene/h-BN/graphene heterostructure shows higher sensitivity toward different nucleotides compared to a similar structure consisting of pristine graphene and can be considered as a promising candidate for DNA sequencing applications.
Collapse
Affiliation(s)
- Ali Kiakojouri
- Center for Computational Micro and Nanoelectronics, Faculty of Electrical Engineering, K. N. Toosi University of Technology, 16317-14191 Tehran, Iran.
| | - Irmgard Frank
- Theoretische Chemie, Universität Hannover, Callinstr. 3A, 30167 Hannover, Germany
| | - Ebrahim Nadimi
- Center for Computational Micro and Nanoelectronics, Faculty of Electrical Engineering, K. N. Toosi University of Technology, 16317-14191 Tehran, Iran.
| |
Collapse
|
11
|
Wasfi A, Awwad F, Ayesh AI. Detection of DNA Bases via Field Effect Transistor of Graphene Nanoribbon with a Nanopore: Semi-empirical Modeling. IEEE Trans Nanobioscience 2021; 21:347-357. [PMID: 33945483 DOI: 10.1109/tnb.2021.3077364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
DNA sequencing techniques are critical in order to investigate genes' functions. Obtaining fast, accurate, and affordable DNA bases detection makes it possible to acquire personalized medicine. In this article, a semi-empirical technique is used to calculate the electron transport characteristics of the developed z-shaped graphene device to detect the DNA bases. The z-shaped transistor consists of a pair of zigzag graphene nanoribbon (ZGNR) connected through an armchair graphene nanoribbon (AGNR) channel with a nanopore where the DNA nucleobases are positioned. Non-equilibrium Green's function (NEGF) integrated with semi-empirical methodologies are employed to analyze the different electronic transport characteristics. The semi-empirical approach applied is an extension of the extended Hückel (EH) method integrated with self-consistent (SC) Hartree potential. By employing the NEGF+SC-EH, it is proved that each one of the four DNA nucleobases positioned within the nanopore, with the hydrogen passivated edge carbon atoms, results in a unique electrical signature. Both electrical current signal and transmission spectrum measurements of DNA nucleobases inside the device's pore are studied for the different bases with modification of their orientation and lateral translation. Moreover, the electronic noise effect of various factors is studied. The sensor sensitivity is improved by using nitrogen instead of hydrogen to passivate the nanopore and by adding a dual gate to surround the central semiconducting channel of the z-shaped graphene nanoribbon.
Collapse
|
12
|
Xiong M, Graf M, Athreya N, Radenovic A, Leburton JP. Microscopic Detection Analysis of Single Molecules in MoS 2 Membrane Nanopores. ACS NANO 2020; 14:16131-16139. [PMID: 33155815 DOI: 10.1021/acsnano.0c08382] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A systematic microscopic analysis of the various resistive effects involved in the electronic detection of single biomolecules in a nanopore of a MoS2 nanoribbon is presented. The variations of the transverse electronic current along the two-dimensional (2D) membrane due to the translocation of DNA and protein molecules through the pore are obtained by model calculations based on molecular dynamics (MD) and Boltzmann transport formalism, which achieved good agreement with the experimental data. Our analysis points to a self-consistent interaction among ions, charge carriers around the pore rim, and biomolecules. It provides a comprehensive understanding of the effects of the electrolyte concentration, pore size, nanoribbon geometry, and also the doping polarity of the nanoribbon on the electrical sensitivity of the nanopore in detecting biomolecules. These results can be utilized for fine-tuning the design parameters in the fabrication of highly sensitive 2D nanopore biosensors.
Collapse
Affiliation(s)
- Mingye Xiong
- Department of Electrical and Computer Engineering, and N. Holonyak Jr. Micro & Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Michael Graf
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH 1015, Switzerland
| | - Nagendra Athreya
- Department of Electrical and Computer Engineering, and N. Holonyak Jr. Micro & Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Aleksandra Radenovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH 1015, Switzerland
| | - Jean-Pierre Leburton
- Department of Electrical and Computer Engineering, and N. Holonyak Jr. Micro & Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
13
|
de Souza FAL, Sivaraman G, Fyta M, Scheicher RH, Scopel WL, Amorim RG. Electrically sensing Hachimoji DNA nucleotides through a hybrid graphene/h-BN nanopore. NANOSCALE 2020; 12:18289-18295. [PMID: 32857078 DOI: 10.1039/d0nr04363j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The feasibility of synthesizing unnatural DNA/RNA has recently been demonstrated, giving rise to new perspectives and challenges in the emerging field of synthetic biology, DNA data storage, and even the search for extraterrestrial life in the universe. In line with this outstanding potential, solid-state nanopores have been extensively explored as promising candidates to pave the way for the next generation of label-free, fast, and low-cost DNA sequencing. In this work, we explore the sensitivity and selectivity of a graphene/h-BN based nanopore architecture towards detection and distinction of synthetic Hachimoji nucleobases. The study is based on a combination of density functional theory and the non-equilibrium Green's function formalism. Our findings show that the artificial nucleobases are weakly binding to the device, indicating a short residence time in the nanopore during translocation. Significant changes in the electron transmission properties of the device are noted depending on which artificial nucleobase resides in the nanopore, leading to a sensitivity in distinction of up to 80%. Our results thus indicate that the proposed nanopore device setup can qualitatively discriminate synthetic nucleobases, thereby opening up the feasibility of sequencing even unnatural DNA/RNA.
Collapse
Affiliation(s)
- Fábio A L de Souza
- Federal Institute of Education, Science and Technology of Espírito Santo, Ibatiba/ES, Brazil
| | | | | | | | | | | |
Collapse
|
14
|
Procopio EF, Pedrosa RN, L. de Souza FA, Paz WS, Scopel WL. Tuning the photocatalytic water-splitting capability of two-dimensional α-In2Se3 by strain-driven band gap engineering. Phys Chem Chem Phys 2020; 22:3520-3526. [DOI: 10.1039/c9cp06023e] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we have investigated the effects of in-plane mechanical strains on the electronic properties of single-layer α-In2Se3 by means of density functional theory (DFT) calculations.
Collapse
Affiliation(s)
- Erik F. Procopio
- Department of Physics – Federal University of Espirito Santo
- Goiabeiras
- Brazil
| | - Renan N. Pedrosa
- Department of Physics – Federal University of Espirito Santo
- Goiabeiras
- Brazil
| | - Fábio A. L. de Souza
- Federal Institute of Education
- Science and Technology of Espírito Santo
- Ibatiba/ES
- Brazil
| | - Wendel S. Paz
- Department of Physics – Federal University of Espirito Santo
- Goiabeiras
- Brazil
| | - Wanderlã L. Scopel
- Department of Physics – Federal University of Espirito Santo
- Goiabeiras
- Brazil
| |
Collapse
|