76
|
Huang N, Martínez LJ, Jaquay E, Nakano A, Povinelli ML. Optical Epitaxial Growth of Gold Nanoparticle Arrays. NANO LETTERS 2015; 15:5841-5845. [PMID: 26230429 DOI: 10.1021/acs.nanolett.5b01929] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We use an optical analogue of epitaxial growth to assemble gold nanoparticles into 2D arrays. Particles are attracted to a growth template via optical forces and interact through optical binding. Competition between effects determines the final particle arrangements. We use a Monte Carlo model to design a template that favors growth of hexagonal particle arrays. We experimentally demonstrate growth of a highly stable array of 50 gold particles with 200 nm diameter, spaced by 1.1 μm.
Collapse
|
77
|
Wada N, Tachibana D, Kurihara Y, Nakagawa K, Nakano A, Terada H, Tanaka K, Fukui M, Koyama M, Hecher K. Alterations in time intervals of ductus venosus and atrioventricular flow velocity waveforms in growth-restricted fetuses. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2015; 46:221-226. [PMID: 25366537 DOI: 10.1002/uog.14717] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 10/14/2014] [Accepted: 10/22/2014] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate time intervals of the ductus venosus (DV) flow velocity waveform (FVW) and those of the cardiac cycle that correspond with each DV-FVW component in fetuses with intrauterine growth restriction (IUGR) due to placental insufficiency. METHODS Women with a pregnancy complicated by IUGR were recruited into the study, as was a normal control group. Time intervals for systolic (S) and diastolic (D) components were measured in DV-FVW as follows: S(DV), from the nadir of the a-wave during atrial contraction to the nadir between the S-wave and D-wave; D(DV), from the nadir between S-wave and D-wave to the nadir of the a-wave. Regarding cardiac cycles, the following variables were measured from ventricular inflow through the tricuspid valve (TV) and mitral valve (MV): S(TV) and S(MV), from the second peak of ventricular inflow caused by atrial contraction (A-wave) to the opening of the atrioventricular valve; D(TV) and D(MV), from the opening of the atrioventricular valve to the peak of the A-wave. In the IUGR group, only the last examination performed within 1 week of delivery was used for analysis. All variables were analyzed statistically using Z-scores. RESULTS Data were obtained from 249 normal fetuses and 26 fetuses with IUGR. Compared to normal fetuses, S(DV) showed a significant decrease (P < 0.001), while D(DV) showed a significant increase (P < 0.001) in the IUGR group. Regarding cardiac cycles, S(TV) and S(MV) showed significant decreases (P = 0.014 and P < 0.001, respectively) and D(TV) and D(MV) showed significant increases (P = 0.008 and P = 0.002, respectively) in fetuses with IUGR. CONCLUSION Time-interval alterations of DV-FVW in growth-restricted fetuses reflect the hemodynamic events caused by placental insufficiency.
Collapse
|
78
|
Seguchi O, Nakano A, Kuroda K, Hisamatsu E, Sato T, Nakajima S, Sato T, Sunami H, Yanase M, Kitakaze M, Nakatani T. Partial Pressure of End-Tidal Carbon Dioxide Predicts the Complication of Secondary Pulmonary Hypertension in Patients With Advanced Heart Failure. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
79
|
Nakano A, Mishima K, Nakano H, Katase N, Mano T, Ueyama Y. A Case of Squamous Cell Carcinoma Arising from Branchial Cleft Cyst. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
80
|
Kakino A, Yamamoto K, Nakano A, Li L, Fujita Y, Rakugi H, Sawamura T. AT1 directly interacting with LOX-1 mediates signal transduction induced by oxidized LDL. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
81
|
Shimamura K, Shimojo F, Kalia RK, Nakano A, Nomura KI, Vashishta P. Hydrogen-on-demand using metallic alloy nanoparticles in water. NANO LETTERS 2014; 14:4090-4096. [PMID: 24960149 DOI: 10.1021/nl501612v] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hydrogen production from water using Al particles could provide a renewable energy cycle. However, its practical application is hampered by the low reaction rate and poor yield. Here, large quantum molecular dynamics simulations involving up to 16,611 atoms show that orders-of-magnitude faster reactions with higher yields can be achieved by alloying Al particles with Li. A key nanostructural design is identified as the abundance of neighboring Lewis acid-base pairs, where water-dissociation and hydrogen-production require very small activation energies. These reactions are facilitated by charge pathways across Al atoms that collectively act as a "superanion" and a surprising autocatalytic behavior of bridging Li-O-Al products. Furthermore, dissolution of Li atoms into water produces a corrosive basic solution that inhibits the formation of a reaction-stopping oxide layer on the particle surface, thereby increasing the yield. These atomistic mechanisms not only explain recent experimental findings but also predict the scalability of this hydrogen-on-demand technology at industrial scales.
Collapse
|
82
|
Shimojo F, Hattori S, Kalia RK, Kunaseth M, Mou W, Nakano A, Nomura KI, Ohmura S, Rajak P, Shimamura K, Vashishta P. A divide-conquer-recombine algorithmic paradigm for large spatiotemporal quantum molecular dynamics simulations. J Chem Phys 2014; 140:18A529. [DOI: 10.1063/1.4869342] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
83
|
Choubey A, Kalia RK, Malmstadt N, Nakano A, Vashishta P. Cholesterol translocation in a phospholipid membrane. Biophys J 2014; 104:2429-36. [PMID: 23746515 DOI: 10.1016/j.bpj.2013.04.036] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 02/03/2013] [Accepted: 04/16/2013] [Indexed: 11/18/2022] Open
Abstract
Cholesterol (CHOL) molecules play a key role in modulating the rigidity of cell membranes and controlling intracellular transport and signal transduction. Using an all-atom molecular dynamics approach, we study the process of CHOL interleaflet transport (flip-flop) in a dipalmitoylphosphatidycholine (DPPC)-CHOL bilayer over a time period of 15 μs. We investigate the effect of the flip-flop process on mechanical stress across the bilayer and the role of CHOL in inducing molecular order in bilayer leaflets. The simulations are carried out at physiologically relevant CHOL concentration (30%), temperature (323 K), and pressure (1 bar). CHOL flip-flop events are observed with a rate constant of 3 × 10⁴s⁻¹. Once a flip-flop event is triggered, a CHOL molecule takes an average of 73 nanoseconds to migrate from one bilayer leaflet to the other.
Collapse
|
84
|
Tanosaki R, Kumazawa T, Yoshida A, Oguni S, Nakano A, Yamagata S, Takahashi N, Kurosawa S, Kim SW, Yamashita T, Mori S, Heike Y, Fukuda T, Hamaguchi Y, Tsuda H. Novel and rapid enumeration method of peripheral blood stem cells using automated hematology analyzer. Int J Lab Hematol 2013; 36:521-30. [DOI: 10.1111/ijlh.12182] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 09/17/2013] [Indexed: 11/28/2022]
|
85
|
Shekhar A, Nomura KI, Kalia RK, Nakano A, Vashishta P. Nanobubble collapse on a silica surface in water: billion-atom reactive molecular dynamics simulations. PHYSICAL REVIEW LETTERS 2013; 111:184503. [PMID: 24237524 DOI: 10.1103/physrevlett.111.184503] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 05/05/2023]
Abstract
Cavitation bubbles occur in fluids subjected to rapid changes in pressure. We use billion-atom reactive molecular dynamics simulations on a 163,840-processor BlueGene/P supercomputer to investigate damage caused by shock-induced collapse of nanobubbles in water near an amorphous silica surface. Collapse of an empty bubble generates a high-speed nanojet, which causes pitting on the silica surface. We find pit radii are close to bubble radii, and experiments also indicate linear scaling between them. The gas-filled bubbles undergo partial collapse and, consequently, the damage on the silica surface is mitigated.
Collapse
|
86
|
Abstract
Based on molecular-dynamics simulations validated with quantum-mechanical calculations, we predict that (111) twin planes in a [111]-oriented GaAs nanowire attain attractive interactions mediated by surface strain. This gives rise to a self-replication mechanism that continuously generates a twin superlattice in a nanowire during growth. We demonstrate significant implications of the twin-twin interaction for the electronic, mechanical, and chemical properties of nanowires. These unique properties suggest potential applications such as catalysts for solar fuel production and nanoscale mechanical dampers.
Collapse
|
87
|
Shimamura K, Shimojo F, Kalia RK, Nakano A, Vashishta P. Bonding and structure of ceramic-ceramic interfaces. PHYSICAL REVIEW LETTERS 2013; 111:066103. [PMID: 23971593 DOI: 10.1103/physrevlett.111.066103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2013] [Indexed: 06/02/2023]
Abstract
Quantum molecular dynamics simulations of α-Al2O3(0001)/3C-SiC(111) interfaces reveal profound effects of thermal annealing for producing strong interfaces consisting solely of cation-anion bonds and their consequence on interfacial structures. A Si-terminated SiC surface and Al2O3 form a stronger interface (Si-interface) with a Si-O bond density of 12.2 nm(-2), whereas the C interface has an Al-C bond density of 9.46 nm(-2). The interfacial bond strengthening is accompanied by the formation of an Al2O3 interphase with a thickness of 2-8 Å. Such atomistic understanding may help rational interfacial design of high-temperature ceramic composites for broad applications such as power generation systems.
Collapse
|
88
|
Seguchi O, Nakano A, Hieda M, Watanabe T, Sato T, Sunami H, Murata Y, Yanase M, Kitakaze M, Nakatani T. Noninvasive and mainstream end-tidal carbon dioxide monitoring via nasal cannula is a unique and useful technique for diagnosing pulmonary hypertension in patients with heart failure. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
89
|
Choubey A, Kalia RK, Nakano A, Vashishta P. Barriers to SIRNA Transfection through a Phospholipid Bilayer. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.3663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
90
|
Ngo VA, Kalia RK, Nakano A, Vashishta P. Molecular Mechanism of Flip-Flop in Triple-Layer Oleic-Acid Membrane: Correlation between Oleic Acid and Water. J Phys Chem B 2012; 116:13416-23. [DOI: 10.1021/jp307227r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
91
|
Matsunaga T, Mutai H, Kunishima S, Namba K, Morimoto N, Shinjo Y, Arimoto Y, Kataoka Y, Shintani T, Morita N, Sugiuchi T, Masuda S, Nakano A, Taiji H, Kaga K. A prevalent founder mutation and genotype-phenotype correlations ofOTOFin Japanese patients with auditory neuropathy. Clin Genet 2012; 82:425-32. [DOI: 10.1111/j.1399-0004.2012.01897.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
92
|
Mou W, Ohmura S, Hattori S, Nomura KI, Shimojo F, Nakano A. Enhanced charge transfer by phenyl groups at a rubrene/C60 interface. J Chem Phys 2012; 136:184705. [PMID: 22583307 DOI: 10.1063/1.4712616] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Exciton dynamics at an interface between an electron donor, rubrene, and a C(60) acceptor is studied by nonadiabatic quantum molecular dynamics simulation. Simulation results reveal an essential role of the phenyl groups in rubrene in increasing the charge-transfer rate by an order-of-magnitude. The atomistic mechanism of the enhanced charge transfer is found to be the amplification of aromatic breathing modes by the phenyl groups, which causes large fluctuations of electronic excitation energies. These findings provide insight into molecular structure design for efficient solar cells, while explaining recent experimental observations.
Collapse
|
93
|
Choubey A, Nomura KI, Kalia R, Nakano A, Vashishta P. Cholesterol Flip-Flop Dynamics in a Phospholipid Bilayer: All Atom Molecular Dynamics Simulations. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.1329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
|
94
|
Ngo VA, Choubey A, Kalia R, Nakano A, Vashishta P. Small Interfering RNA Transfection Barriers Across a Lipid Membrane. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.3473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
|
95
|
Akasaka E, Nakano H, Nakano A, Toyomaki Y, Takiyoshi N, Rokunohe D, Nishikawa Y, Korekawa A, Matsuzaki Y, Mitsuhashi Y, Sawamura D. Diffuse and focal palmoplantar keratoderma can be caused by a keratin 6c mutation. Br J Dermatol 2011; 165:1290-2. [DOI: 10.1111/j.1365-2133.2011.10552.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
96
|
Oiso N, Nakano A, Yano Y, Kawada A. The diagnostic usefulness of dermoscopy for identifying six-legged larval ticks. Ticks Tick Borne Dis 2011; 1:197-8. [PMID: 21771529 DOI: 10.1016/j.ttbdis.2010.09.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Revised: 09/23/2010] [Accepted: 09/27/2010] [Indexed: 11/19/2022]
Abstract
Ticks are vectors of a variety of diseases such as Lyme disease and Japanese spotted fever. We examined an 87-year-old female with multiple tick bites by at least 236 larval Amblyomma testudinarium infestations. Numerous tick bites are generally caused by the six-legged larvae, which were verified in this case by dermoscopy. The present case indicates the diagnostic usefulness of dermoscopy for six-legged larval tick bites.
Collapse
|
97
|
Ohmura S, Shimojo F, Kalia RK, Kunaseth M, Nakano A, Vashishta P. Reaction of aluminum clusters with water. J Chem Phys 2011; 134:244702. [DOI: 10.1063/1.3602326] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
98
|
Wu Z, Kalia RK, Nakano A, Vashishta P. Vibrational and thermodynamic properties of β-HMX: A first-principles investigation. J Chem Phys 2011; 134:204509. [DOI: 10.1063/1.3587135] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
99
|
Wu Z, Kalia RK, Nakano A, Vashishta P. First-principles calculations of the structural and dynamic properties, and the equation of state of crystalline iodine oxides I2O4, I2O5, and I2O6. J Chem Phys 2011; 134:204501. [DOI: 10.1063/1.3590278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
|
100
|
Takashima A, Shimada Y, Hamaguchi T, Ito Y, Nakano A, Nakamura K, Shibata T, Fukuda H, Moriya Y. A Phase I/II Trial of Chemoradiotherapy Concurrent with S-1 plus Mitomycin C in Patients with Clinical Stage II/III Squamous Cell Carcinoma of Anal Canal (JCOG0903: SMART-AC). Jpn J Clin Oncol 2011; 41:713-7. [DOI: 10.1093/jjco/hyr028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
|