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https://www.readbyqxmd.com/read/27922833/x-ray-photoelectron-spectroscopy-and-transmission-electron-microscopy-analysis-of-silver-coated-gold-nanorods-designed-for-bionanotechnology-applications
#1
Fumiya Watanabe, Zeid A Nima, Takumi Honda, Masatoshi Mitsuhara, Minoru Nishida, Alexandru S Biris
Multicomponent nano-agents were designed and built via a core-shell approach to enhance their surface enhanced Raman scattering (SERS) signals. These nano-agents had 36 nm × 12 nm gold nanorod cores coated by 4 nm thick silver shell films and a subsequent thin bifunctional thiolated polyethylene glycol (HS-PEG-COOH) layer. Ambient time-lapsed SERS signal measurements of these functionalized nanorods taken over a two-week period indicated no signal degradation, suggesting that large portions of the silver shells remained in pure metallic form...
December 6, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27922643/a-kanamycin-sensor-based-on-an-electrosynthesized-molecularly-imprinted-poly-o-phenylenediamine-film-on-a-single-walled-carbon-nanohorn-modified-glassy-carbon-electrode
#2
Shuang Han, Bingqian Li, Ze Song, Sihao Pan, Zhichao Zhang, Hui Yao, Shuyun Zhu, Guobao Xu
A single-walled carbon nanohorn (SWCNH) has been used to construct a molecularly imprinted electrochemical sensor for the first time. Kanamycin, a widely used aminoglycoside antibiotic, is used as a representative analyte to test the detection strategy. The kanamycin sensor was constructed by the electropolymerization of a molecularly imprinted poly-o-phenylenediamine film on a SWCNH modified glassy carbon electrode. The sensor was investigated in the presence or absence of kanamycin by cyclic voltammetry to verify the changes in the redox peak currents of K3Fe(CN)6...
December 6, 2016: Analyst
https://www.readbyqxmd.com/read/27922201/high-performance-air-stable-field-effect-transistors-based-on-heteroatom-substituted-naphthalenediimide-benzothiadiazole-copolymers-exhibiting-ultrahigh-electron-mobility-up-to-8-5-cm-v-1-s-1
#3
Zhiyuan Zhao, Zhihong Yin, Huajie Chen, Liping Zheng, Chunguang Zhu, Long Zhang, Songting Tan, Hanlin Wang, Yunlong Guo, Qingxin Tang, Yunqi Liu
Rational heteroatom engineering is applied to develop high-performance electron-transporting naphthalenediimide copolymers. Top-gate field-effect transistors fabricated from selenophene-containing polymers achieve an ultrahigh electron mobility of 8.5 cm(2) V(-1) s(-1) and excellent air-stability. The results demonstrate that the incorporation of selenophene heterocycles into the polymers can improve film-forming ability, intermoleclar interaction, and carrier transport significantly.
December 6, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27922114/quantum-hall-effect-in-epitaxial-graphene-with-permanent-magnets
#4
F D Parmentier, T Cazimajou, Y Sekine, H Hibino, H Irie, D C Glattli, N Kumada, P Roulleau
We have observed the well-kown quantum Hall effect (QHE) in epitaxial graphene grown on silicon carbide (SiC) by using, for the first time, only commercial NdFeB permanent magnets at low temperature. The relatively large and homogeneous magnetic field generated by the magnets, together with the high quality of the epitaxial graphene films, enables the formation of well-developed quantum Hall states at Landau level filling factors v = ±2, commonly observed with superconducting electro-magnets. Furthermore, the chirality of the QHE edge channels can be changed by a top gate...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922107/emotion-dysregulation-of-women-with-premenstrual-syndrome
#5
Mengying Wu, Ying Liang, Qingguo Wang, Yan Zhao, Renlai Zhou
The aim of the current study was to test whether women with premenstrual syndrome (PMS) had difficulties in emotion regulation. In Study 1, we investigated the relationship between the habitual use of emotion-regulation strategies and the severity of PMS (n = 230). The results showed that the severity of PMS was negatively associated with the habitual use of reappraisal, but positively associated with the habitual use of suppression. In Study 2, we first investigated the difference in the spontaneous use of suppression versus reappraisal between women with (n = 42) and without PMS (n = 42) when watching sad film clips...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922104/transistor-properties-of-2-7-dialkyl-substituted-phenanthro-2-1-b-7-8-b-dithiophene
#6
Yoshihiro Kubozono, Keita Hyodo, Shino Hamao, Yuma Shimo, Hiroki Mori, Yasushi Nishihara
A new phenacene-type molecule with five fused aromatic rings was synthesized: 2,7-didodecylphenanthro[2,1-b:7,8-b']dithiophene ((C12H25)2-i-PDT), with two terminal thiophene rings. Field-effect transistors (FETs) using thin films of this molecule were fabricated using various gate dielectrics, showing p-channel normally-off FET properties with field-effect mobilities (μ) greater than 1 cm(2) V(-1) s(-1). The highest μ value in the thin-film FETs fabricated in this study was 5.4 cm(2) V(-1) s(-1), when a 150 nm-thick ZrO2 gate dielectric was used...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922101/social-determinants-of-eyeblinks-in-adult-male-macaques
#7
Sébastien Ballesta, Clayton P Mosher, Jeno Szep, Kate D Fischl, Katalin M Gothard
Videos with rich social and emotional content elicit natural social behaviors in primates. Indeed, while watching videos of conspecifics, monkeys engage in eye contact, gaze follow, and reciprocate facial expressions. We hypothesized that the frequency and timing of eyeblinks also depends on the social signals contained in videos. We monitored the eyeblinks of four male adult macaques while they watched videos of conspecifics displaying facial expressions with direct or averted gaze. The instantaneous blink rate of all four animals decreased during videos...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922069/formation-mechanism-of-ruddlesden-popper-type-antiphase-boundaries-during-the-kinetically-limited-growth-of-sr-rich-srtio3-thin-films
#8
Chencheng Xu, Hongchu Du, Alexander J H van der Torren, Jan Aarts, Chun-Lin Jia, Regina Dittmann
We elucidated the formation process for Ruddlesden-Popper-type defects during pulsed laser deposition of Sr rich SrTiO3 thin films by a combined analysis of in-situ atomic force microscopy, low energy electron diffraction and high resolution scanning transmission electron microscopy. At the early growth stage of 1.5 unit cells, the excess Sr results in the formation of SrO on the surface, resulting in a local termination change from TiO2 to SrO, thereby forming a Sr rich (2 × 2) surface reconstruction...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922062/enhanced-self-organized-dewetting-of-ultrathin-polymer-blend-film-for-large-area-fabrication-of-sers-substrate
#9
Huanhuan Zhang, Lin Xu, Yabo Xu, Gang Huang, Xueyu Zhao, Yuqing Lai, Tongfei Shi
We study the enhanced dewetting of ultrathin Polystyrene (PS)/Poly (methyl methacrylate) (PMMA) blend films in a mixed solution, and reveal the dewetting can act as a simple and effective method to fabricate large-area surface-enhanced Raman scattering (SERS) substrate. A bilayer structure consisting of under PMMA layer and upper PS layer forms due to vertical phase separation of immiscible PS/PMMA during the spin-coating process. The thicker layer of the bilayer structure dominates the dewetting structures of PS/PMMA blend films...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922033/profilometry-of-thin-films-on-rough-substrates-by-raman-spectroscopy
#10
Martin Ledinský, Bertrand Paviet-Salomon, Aliaksei Vetushka, Jonas Geissbühler, Andrea Tomasi, Matthieu Despeisse, Stefaan De Wolf, Christophe Ballif, Antonín Fejfar
Thin, light-absorbing films attenuate the Raman signal of underlying substrates. In this article, we exploit this phenomenon to develop a contactless thickness profiling method for thin films deposited on rough substrates. We demonstrate this technique by probing profiles of thin amorphous silicon stripes deposited on rough crystalline silicon surfaces, which is a structure exploited in high-efficiency silicon heterojunction solar cells. Our spatially-resolved Raman measurements enable the thickness mapping of amorphous silicon over the whole active area of test solar cells with very high precision; the thickness detection limit is well below 1 nm and the spatial resolution is down to 500 nm, limited only by the optical resolution...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921998/localized-charge-imaging-with-scanning-kelvin-probe-microscopy
#11
M F Orihuela, A M Somoza, J Colchero, M Ortuño, E Palacios-Lidón
In this work, we propose an intuitive and easily implementable approach to model and interpret scanning Kelvin probe microscopy images of insulating samples with localized charges. The method, based on the image charges method, has been validated by a systematic comparison of its predictions with experimental measurements performed on charge domains of different sizes, injected in polymethyl methacrylate discontinuous films. The agreement between predictions and experimental lateral profiles, as well as with spectroscopy tip-sample distance curves, supports its consistency...
December 6, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27921384/a-robust-molecular-catalyst-generated-in-situ-for-photo-and-electrochemical-water-oxidation
#12
Hussein A Younus, Nazir Ahmad, Adeel H Chughtai, Matthias Vandichel, Michael Busch, Kristof Van Hecke, Mekhman Yusubov, Shaoxian Song, Francis Verpoort
Water splitting is the key step towards artificial photosystems for solar energy conversion and storage in the form of chemical bonding. The oxidation of water is the bottle-neck of this process that hampers its practical utility and hence efficient, robust, and also easy to make catalytic systems based on cheap and earth abundant materials are of exceptional importance. Here, we present an in-situ generated cobalt catalyst [Co(II)(TCA)2(H2O)2] (TCA = 1-Mesityl-1,2,3-1H-triazole-4-carboxylate) efficiently conducting photochemical water oxidation at near-neutral conditions...
December 5, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27921245/a-novel-method-for-preventing-surface-film-entrapment-of-water-fleas-and-its-application-for-toxicity-testing-with-heavy-metals
#13
Rongxue Cui, Jin Il Kwak, Youn-Joo An
Some water fleas such as Daphnia galeata and Bosmina longirostris are difficult to culture and use in ecotoxicity testing since they can easily become entrapped at the surface film. Cetyl alcohol was the most prevalent chemical used to prevent the entrapment of water fleas in previous studies. However, cetyl alcohol possesses a number of disadvantages including its toxicity and water insolubility. This study presents a novel method for preventing surface film entrapment of the water flea D. galeata and B. longirostris acute testing...
December 5, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27921074/initial-performance-studies-of-a-wearable-brain-positron-emission-tomography-camera-based-on-autonomous-thin-film-digital-geiger-avalanche-photodiode-arrays
#14
Charles R Schmidtlein, James N Turner, Michael O Thompson, Krishna C Mandal, Ida Häggström, Jiahan Zhang, John L Humm, David H Feiglin, Andrzej Krol
Using analytical and Monte Carlo modeling, we explored performance of a lightweight wearable helmet-shaped brain positron emission tomography (PET), or BET camera, based on thin-film digital Geiger avalanche photodiode arrays with Lutetium-yttrium oxyorthosilicate (LYSO) or [Formula: see text] scintillators for imaging in vivo human brain function of freely moving and acting subjects. We investigated a spherical cap BET and cylindrical brain PET (CYL) geometries with 250-mm diameter. We also considered a clinical whole-body (WB) LYSO PET/CT scanner...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/27920903/toward-clean-suspended-cvd-graphene
#15
Alexander Yulaev, Guangjun Cheng, Angela R Hight Walker, Ivan V Vlassiouk, Alline Myers, Marina S Leite, Andrei Kolmakov
The application of suspended graphene as electron transparent supporting media in electron microscopy, vacuum electronics, and micromechanical devices requires the least destructive and maximally clean transfer from their original growth substrate to the target of interest. Here, we use thermally evaporated anthracene films as the sacrificial layer for graphene transfer onto an arbitrary substrate. We show that clean suspended graphene can be achieved via desorbing the anthracene layer at temperatures in the 100 °C to 150 °C range, followed by two sequential annealing steps for the final cleaning, using Pt catalyst and activated carbon...
2016: RSC Advances
https://www.readbyqxmd.com/read/27920895/organosilane-functionalization-of-nanostructured-indium-tin-oxide-films
#16
R Pruna, F Palacio, M Martínez, O Blázquez, S Hernández, B Garrido, M López
Fabrication and organosilane-functionalization and characterization of nanostructured ITO electrodes are reported. Nanostructured ITO electrodes were obtained by electron beam evaporation, and a subsequent annealing treatment was selectively performed to modify their crystalline state. An increase in geometrical surface area in comparison with thin-film electrodes area was observed by atomic force microscopy, implying higher electroactive surface area for nanostructured ITO electrodes and thus higher detection levels...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920870/pyle-disease-metaphyseal-dysplasia-presenting-in-two-adult-sisters
#17
Diego Ximenes Soares, Amália Mapurunga Almeida, André Rodrigues Façanha Barreto, Ilze Jucá Alencar E Silva, José Daniel Vieira de Castro, Francisco José Magalhães Pinto, Daniel Aguiar Dias, Lindenberg Barbosa Aguiar
Pyle's disease is an extremely rare skeletal disorder characterized by a benign course and an autosomal recessive genetic pattern of inheritance. Its causal mutation is still unknown. In the medical literature, fewer than 30 cases have been described to date. We report the case of two female siblings, daughters of consanguineous parents, referred to the radiology department complaining of genu valgum. Laboratory tests showed no other relevant findings. Conventional radiography plain films revealed Erlenmeyer flask deformity in bilateral femorotibial metaphyses, metaphyseal flaring of long bones, and mild sclerosis of the skull base...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920749/reappraisal-modulates-attentional-bias-to-angry-faces
#18
Shin Ah Kim, Hackjin Kim, Sang Hee Kim
Heightened attentional bias to emotional information is one of the main characteristics of disorders related to emotion dysregulation such as anxiety, depression, and substance abuse. Although reappraisal, an emotion regulation strategy, is known to effectively modulate subjective experience of emotions, it remains unknown whether reappraisal can alter attentional biases to emotional information. In the current research, we investigated the influence of instruction-induced state reappraisal (Study 1) and trait reappraisal (Study 2) on attentional biases to happy and angry faces...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27920494/presence-or-absence-of-ocular-surface-inflammation-directs-clinical-and-therapeutic-management-of-dry-eye
#19
Robert Sambursky
BACKGROUND: The presence of clinically significant inflammation has been confirmed in the tears of 40%-65% of patients with symptoms of dry eye. Ocular surface inflammation may lead to tear film instability, epithelial cell irregularities, and permeability, resulting in chronic symptomatic pain and fluctuating vision as well as negative surgical outcomes. PATIENTS AND METHODS: A retrospective single center medical chart review of 100 patients was conducted. All patients were tested with the InflammaDry test to determine if patients exhibited elevated levels of matrix metalloproteinase 9 (MMP-9)...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27920262/home-exercise-programmes-supported-by-video-and-automated-reminders-compared-with-standard-paper-based-home-exercise-programmes-in-patients-with-stroke-a-randomized-controlled-trial
#20
Kellie B Emmerson, Katherine E Harding, Nicholas F Taylor
OBJECTIVE: To determine whether patients with stroke receiving rehabilitation for upper limb deficits using smart technology (video and reminder functions) demonstrate greater adherence to prescribed home exercise programmes and better functional outcomes when compared with traditional paper-based exercise prescription. DESIGN: Randomized controlled trial comparing upper limb home exercise programmes supported by video and automated reminders on smart technology, with standard paper-based home exercise programmes...
December 5, 2016: Clinical Rehabilitation
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