keyword
MENU ▼
Read by QxMD icon Read
search

aluminum nanoparticles

keyword
https://www.readbyqxmd.com/read/28647249/potential-acute-effects-of-suspended-aluminum-nitride-aln-nanoparticles-on-soluble-microbial-products-smp-of-activated-sludge
#1
Lijie Zhou, Weiqin Zhuang, Xin Wang, Ke Yu, Shufang Yang, Siqing Xia
The study aims to identify the potential acute effects of suspended aluminum nitride (AlN) nanoparticles (NPs) on soluble microbial products (SMP) of activated sludge. Cultured activated sludge loaded with 1, 10, 50, 100, 150 and 200mg/L of AlN NPs were carried out in this study. As results showed, AlN NPs had a highly inverse proportionality to bacterial dehydrogenase and OUR, indicating its direct toxicity to the activated sludge viability. The toxicity of AlN NPs was mainly due to the nano-scale of AlN NPs...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28638073/plasmon-induced-selective-carbon-dioxide-conversion-on-earth-abundant-aluminum-cuprous-oxide-antenna-reactor-nanoparticles
#2
Hossein Robatjazi, Hangqi Zhao, Dayne F Swearer, Nathaniel J Hogan, Linan Zhou, Alessandro Alabastri, Michael J McClain, Peter Nordlander, Naomi J Halas
The rational combination of plasmonic nanoantennas with active transition metal-based catalysts, known as 'antenna-reactor' nanostructures, holds promise to expand the scope of chemical reactions possible with plasmonic photocatalysis. Here, we report earth-abundant embedded aluminum in cuprous oxide antenna-reactor heterostructures that operate more effectively and selectively for the reverse water-gas shift reaction under milder illumination than in conventional thermal conditions. Through rigorous comparison of the spatial temperature profile, optical absorption, and integrated electric field enhancement of the catalyst, we have been able to distinguish between competing photothermal and hot-carrier driven mechanistic pathways...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28634499/three-input-gate-logic-circuits-on-chemically-assembled-single-electron-transistors-with-organic-and-inorganic-hybrid-passivation-layers
#3
Yutaka Majima, Guillaume Hackenberger, Yasuo Azuma, Shinya Kano, Kosuke Matsuzaki, Tomofumi Susaki, Masanori Sakamoto, Toshiharu Teranishi
Single-electron transistors (SETs) are sub-10-nm scale electronic devices based on conductive Coulomb islands sandwiched between double-barrier tunneling barriers. Chemically assembled SETs with alkanethiol-protected Au nanoparticles show highly stable Coulomb diamonds and two-input logic operations. The combination of bottom-up and top-down processes used to form the passivation layer is vital for realizing multi-gate chemically assembled SET circuits, as this combination enables us to connect conventional complementary metal oxide semiconductor (CMOS) technologies via planar processes...
2017: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/28621928/aluminum-oxy-hydroxide-nanosticks-synthesized-in-bicontinuous-reverse-microemulsion-have-potent-vaccine-adjuvant-activity
#4
Xu Li, Stephanie Hufnagel, Haiyue Xu, Solange A Valdes, Sachin G Thakkar, Zhengrong Cui, Hugo Celio
Insoluble aluminum salts such as aluminum (oxy)hydroxide are commonly used vaccine adjuvants. Recently, there is evidence suggesting that the adjuvant activity of aluminum salt-based materials is tightly related to their physico-chemical properties, including nanometer-scale size, shape with long aspect ratio, and low degree of crystallinity. Herein, for the first time, the bicontinuous reverse microemulsion (RM) technique was utilized to synthesize stick-like monodisperse aluminum (oxy)hydroxide nanoparticles with a long aspect ratio of ~10, length of ~80 nm and low degree of crystallinity (denoted as Al-nanosticks)...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28621272/radiopacity-of-mineral-trioxide-aggregate-with-and-without-inclusion-of-silver-nanoparticles
#5
Mariana Ss Mendes, Leonardo D Resende, Cláudia A Pinto, Denise P Raldi, Flavia Gr Cardoso, Sandra M Habitante
AIM: The aim of this study was to investigate the inclusion of silver nanoparticles (Ag NPs) in the mineral trioxide aggregate (MTA) composition to know which changes will result in the radiopacity of the material. MATERIALS AND METHODS: The experiment was performed according to the American National Standard Institute/American Dental Association specification no. 57/2000 and ISO 6876/2001. Five plates with five holes measuring 1 mm in depth and 5 mm in internal diameter were filled according to the different experimental groups as follows: white mineral trioxide aggregate (WMTA) + NP50 - W MTA with liquid Ag NP 50 ppm, WMTA + NP30 - W MTA with liquid Ag NP 30 ppm, WMTA + NP22 - W MTA with liquid Ag NP 22 ppm, WMTA + NPP - white MTA with liquid Ag NP and powder 1%, WMTA (control)...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28618380/magnetite-fe-al-montmorillonite-as-a-fenton-catalyst-with-efficient-degradation-of-phenol
#6
Xipeng Wei, Honghai Wu, Feng Sun
A Fe-Al-MPM material assembled from nanosized magnetite and Fe-Al-pillared montmorillonite (Fe-Al-Mt) was characterized by XRD, XPS, BET, SEM and TEM. Fe-Al-Mt was proven to be capable of facilitating the dispersion of magnetite nanoparticles and inhibiting their aggregation. The coupling of Fe-Al-Mt with magnetite in Fe-Al-MPM improved its Fenton catalytic activity. Complete conversion of phenol within 80min with a high TOC removal rate (>78%) was achieved using Fe-Al-MPM as a heterogeneous Fenton catalyst under optimized conditions...
May 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28590715/enhanced-immune-adjuvant-activity-of-aluminum-oxyhydroxide-nanorods-through-cationic-surface-functionalization
#7
Bingbing Sun, Zhaoxia Ji, Yu-Pei Liao, Chong Hyun Chang, Xiang Wang, Justine Ku, Changying Xue, Vahid Mirshafiee, Tian Xia
Aluminum salt-based vaccine adjuvants are prevailingly used in FDA-approved vaccines for the prevention of infectious diseases for over eight years. Despite of their safe applications, the mechanisms regarding how the material characteristics affect the interactions at nano-bio interface and immunogenicity still remain unclear. Recently, studies have indicated that NLRP3 inflammasome activation plays a critical role to induce adjuvant effects that is controlled by the inherent shape and hydroxyl contents of aluminum oxyhydroxide (AlOOH) nanoparticles, however, the detailed relationship between surface properties and adjuvant effects for these materials remain unknown...
June 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28582722/adsorption-of-mercury-ions-from-wastewater-by-a-hyperbranched-and-multi-functionalized-dendrimer-modified-mixed-oxides-nanoparticles
#8
M Arshadi, F Mousavinia, A Khalafi-Nezhad, H Firouzabadi, A Abbaspourrad
In this paper, a novel heterogeneous nanodendrimer with generation of G2.0 was prepared by individual grafting of diethylenetriamine, triazine and l-cysteine methyl ester on the modified aluminum-silicate mixed oxides as a potent adsorbent of Hg(II) ions from aqueous media. The prepared nanodendrimer was characterized by nuclear magnetic resonance spectrum ((1)H NMR and (13)C NMR), Fourier transform infrared spectroscopy (FT-IR), Diffuse reflectance UV-Vis spectroscopy (DR UV-Vis), zeta potential (ζ), inductively coupled plasma atomic emission spectroscopy (ICP-AES), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen adsorption experiments at -196°C and elemental analysis...
May 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28579233/a-phase-2-randomized-observer-blind-placebo-controlled-dose-ranging-trial-of-aluminum-adjuvanted-respiratory-syncytial-virus-f-particle-vaccine-formulations-in-healthy-women-of-childbearing-age
#9
Allison August, Gregory M Glenn, Eloi Kpamegan, Somia P Hickman, Dewal Jani, Hanxin Lu, D Nigel Thomas, Judy Wen, Pedro A Piedra, Louis F Fries
OBJECTIVE: Respiratory syncytial virus (RSV) causes significant morbidity and mortality in infants. We are developing an RSV fusion (F) protein nanoparticle vaccine for immunization of third trimester pregnant women to passively protect infants through transfer of RSV-specific maternal antibodies. The present trial was performed to assess the immunogenicity and safety of several formulations of RSV F vaccine in 1-dose or 2-dose schedules. METHODS: Placebo, or vaccine with 60μg or 120μg RSV F protein and 0...
June 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28577453/stabilization-of-arsenic-and-fluoride-bearing-spent-adsorbent-in-clay-bricks-preparation-characterization-and-leaching-studies
#10
Vineet Kumar Rathore, Prasenjit Mondal
The presence of arsenic and fluoride in groundwater has been observed throughout the world. Many technologies have been developed by various research groups in order to tackle this problem. Adsorption has emerged as one of the best possible technique for the removal of arsenic, fluoride and many other pollutants from drinking water. Although a considerable amount of work has been published on the adsorptive removal of arsenic and fluoride, the area related to the management of spent adsorbent is not well explored...
May 31, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28576325/distinct-physiological-and-molecular-responses-in-arabidopsis-thaliana-exposed-to-aluminum-oxide-nanoparticles-and-ionic-aluminum
#11
Yujian Jin, Xiaoji Fan, Xingxing Li, Zhenyan Zhang, Liwei Sun, Zhengwei Fu, Michel Lavoie, Xiangliang Pan, Haifeng Qian
Nano-aluminium oxide (nAl2O3) is one of the most widely used nanomaterials. However, nAl2O3 toxicity mechanisms and potential beneficial effects on terrestrial plant physiology remain poorly understood. Such knowledge is essential for the development of robust nAl2O3 risk assessment. In this study, we studied the influence of a 10-d exposure to a total selected concentration of 98 μM nAl2O3 or to the equivalent molar concentration of ionic Al (AlCl3) (196 μM) on the model plant Arabidopsis thaliana on the physiology (e...
May 30, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28575817/terahertz-acoustic-phonon-detection-from-a-compact-surface-layer-of-spherical-nanoparticles-powder-mixture-of-aluminum-alumina-and-multi-walled-carbon-nanotube
#12
A Abouelsayed, M R Ebrahim, W El Hotaby, S A Hassan, Emad Al-Ashkar
We present terahertz spectroscopy study on spherical nanoparticles powder mixture of aluminum, alumina, and MWCNTs induced by surface mechanical attrition treatment (SMAT) of aluminum substrates. Surface alloying of AL, Al2O3 0.95% and MWCNTs 0.05% powder mixture was produced during SMAT process, where a compact surface layer of about 200 μm due to ball bombardment was produced from the mixture. Al2O3 alumina powder played a significant role in MWCNTs distribution on surface, those were held in deformation surface cites of micro-cavities due to SMAT process of Al...
May 25, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28539627/assembly-of-gold-nanoparticles-into-aluminum-nanobowl-array
#13
Xingce Fan, Qi Hao, Renchao Jin, Hao Huang, Zhengwei Luo, Xiaozhi Yang, Yile Chen, Xingzhi Han, Meng Sun, Qihua Jing, Zhenggao Dong, Teng Qiu
We mimic unique honeycomb structure as well as its functions of storing honey and pollen to assemble Au nanoparticle pattern on honeycomb-like Al nanobowl array by utilizing solid state dewetting process. Patterned Au nanoarrays of 'one particle per bowl' with tunable plasmonic bands ranging from the visible to the near-infrared region are fabricated by finely selecting the initial thickness of Au film, the geometry of Al nanobowl array and the thermal treatment parameters. This work presents a powerful approach to assemble Au nanoparticles into high density nanoarrays with superior spatial resolution, offering highly concentrated electromagnetic fields for plasmonic sensor applications...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28518076/facile-preparation-of-ultrafine-aluminum-hydroxide-particles-with-or-without-mesoporous-mcm-41-in-ambient-environments
#14
Viktor Dubovoy, Ravi Subramanyam, Michael Stranick, Laurence Du-Thumm, Long Pan
An aqueous suspension of nanogibbsite was synthesized via the titration of aluminum aqua acid [Al(H2O)6](3+) with L-arginine to pH 4.6. Since the hydrolysis of aqueous aluminum salts is known to produce a wide array of products with a wide range of size distributions, a variety of state-of-the-art instruments (i.e., (27)Al/(1)H NMR, FTIR, ICP-OES, TEM-EDX, XPS, XRD, and BET) were used to characterize the synthesis products and identification of byproducts. The product, which was comprised of nanoparticles (10-30 nm), was isolated using gel permeation chromatography (GPC) column technique...
May 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28494572/sers-detection-of-biomolecules-by-highly-sensitive-and-reproducible-raman-enhancing-nanoparticle-array
#15
Tzu-Yi Chan, Ting-Yu Liu, Kuan-Syun Wang, Kun-Tong Tsai, Zhi-Xin Chen, Yu-Chi Chang, Yi-Qun Tseng, Chih-Hao Wang, Juen-Kai Wang, Yuh-Lin Wang
This paper describes the preparation of nanoarrays composed of silver nanoparticles (AgNPs: 20-50 nm) for use as surface-enhanced Raman scattering (SERS) substrates. The AgNPs were grown on porous anodic aluminum oxide (AAO) templates by electrochemical plating, and the inter-channel gap of AAO channels is between 10 and 20 nm. The size and interparticle gap of silver particles were adjusted in order to achieve optimal SERS signals and characterized by scanning electron microscopy, atomic force microscopy, and Raman spectroscopy...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28487625/a-comparative-study-of-raw-and-metal-oxide-impregnated-carbon-nanotubes-for-the-adsorption-of-hexavalent-chromium-from-aqueous-solution
#16
Muhammad I Qureshi, Faheemuddin Patel, Nadhir Al-Baghli, Basim Abussaud, Bassam S Tawabini, Tahar Laoui
The present study reports the use of raw, iron oxide, and aluminum oxide impregnated carbon nanotubes (CNTs) for the adsorption of hexavalent chromium (Cr(VI)) ions from aqueous solution. The raw CNTs were impregnated with 1% and 10% loadings (weight %) of iron oxide and aluminum oxide nanoparticles using wet impregnation technique. The synthesized materials were characterized using scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Batch adsorption experiments were performed to assess the removal efficiency of Cr(VI) ions from water and the effects of pH, contact time, adsorbent dosage, and initial concentration of the Cr(VI) ions were investigated...
2017: Bioinorganic Chemistry and Applications
https://www.readbyqxmd.com/read/28471186/chemical-and-morphological-inhomogeneity-of-aluminum-metal-and-oxides-from-soft-x-ray-spectromicroscopy
#17
Alison B Altman, C Das Pemmaraju, Selim Alayoglu, John Arnold, Corwin H Booth, Augustin Braun, Christopher E Bunker, Alexandre Herve, Stefan G Minasian, David Prendergast, David K Shuh, Tolek Tyliszczak
Oxygen and aluminum K-edge X-ray absorption spectroscopy (XAS), imaging from a scanning transmission X-ray microscope (STXM), and first-principles calculations were used to probe the composition and morphology of bulk aluminum metal, α- and γ-Al2O3, and several types of aluminum nanoparticles. The imaging results agreed with earlier transmission electron microscopy studies that showed a 2 to 5 nm thick layer of Al2O3 on all the Al surfaces. Spectral interpretations were guided by examination of the calculated transition energies, which agreed well with the spectroscopic measurements...
May 4, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28468361/exciton-enhancement-and-exciplex-quenching-by-plasmonic-effect-of-aluminum-nanoparticle-arrays-in-a-blue-organic-light-emitting-diode
#18
Samira Khadir, AmadouThierno Diallo, Mahmoud Chakaroun, Azzedine Boudrioua
We report the investigation of plasmonic effect of array of aluminum nanoparticles (Al-NPs) on blue micro-OLED subject to exciplex emission. N,N'-Di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine (NPB) andcarbazol derivative 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP) have been used as the emitting layer (EML) and hole transport layer (HTL), respectively. For the reference µ-OLED without Al-NPs, we observed two emission peaks attributed to CBP emission and exciplex emission formed at the NPB/CBP (EML/HTL) interface...
May 1, 2017: Optics Express
https://www.readbyqxmd.com/read/28464012/nano-sized-al2o3-reduces-acute-toxic-effects-of-thiacloprid-on-the-non-biting-midge-chironomus-riparius
#19
Carla S Lorenz, Anna-J Wicht, Leyla Guluzada, Leilei Luo, Leonie Jäger, Barbara Crone, Uwe Karst, Rita Triebskorn, Yucang Liang, Reiner Anwander, Stefan B Haderlein, Carolin Huhn, Heinz-R Köhler
This study focuses on interactions between nanoparticles and a pesticide. The aim was to investigate how nano-sized aluminum oxide (410 nm) can alter the toxic effects of thiacloprid, even if no sorption between particles and the insecticide takes place. Thus, our study investigated a rather unexplored interaction. We conducted our research with larvae of Chironomus riparius and used thiacloprid as test substance as its toxicity to C. riparius is well described. The used nano-Al2O3 particles where chosen due to their suitable properties...
2017: PloS One
https://www.readbyqxmd.com/read/28433942/synthesis-and-characterization-of-poly-propylene-imine-dendrimer-grafted-gold-nanoparticles-as-nanocarriers-of-doxorubicin
#20
Marzieh Golshan, Mehdi Salami-Kalajahi, Mina Mirshekarpour, Hossein Roghani-Mamaqani, Maryam Mohammadi
The aim of current work is synthesis 4th-generation-poly(propylene imine) (PPI)-dendrimer modified gold nanoparticles (Au-G4A) as nanocarriers for doxorubicin (DOX) and studying in vitro drug release kinetics from nanocarriers into different media. Accordingly, AuNPs were synthesized by reduction of chloroauric acid (HAuCl4) aqueous solution with trisodium citrate and modified with cysteamine to obtain amine-functionalized (Au-NH2) nanoparticles. Au-NH2 nanoparticles were used as multifunctional cores and participated in Michael addition of acrylonitrile and reduction process by lithium aluminum hydride (LAH) to synthesize Au-G4A nanoparticles...
April 13, 2017: Colloids and Surfaces. B, Biointerfaces
keyword
keyword
34748
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"