Continuous flow nano-technology: manipulating the size, shape, agglomeration, defects and phases of silver nano-particles

Lab on a Chip ◽  
2007 ◽  
Vol 7 (12) ◽  
pp. 1800 ◽  
Author(s):  
K. Swaminathan Iyer ◽  
Colin L. Raston ◽  
Martin Saunders
Keyword(s):  
Continuous Flow ◽  
Nano Particles ◽  
Nano Technology

scholarly journals PERBEDAAN LEBAR CELAH TEPI TUMPATAN SEMEN IONOMER KACA MODIFIKASI RESIN NANO DAN MODIFIKASI RESIN

2017 ◽  
Vol 4 (1) ◽  
pp. 7
Author(s):  
Yuliana Ratna Kumala ◽  
Dini Rachmawati ◽  
Amanda Andika Sari
Keyword(s):  
Artificial Saliva ◽  
Statistical Test ◽  
Nano Particles ◽  
Marginal Gap ◽  
Nano Technology ◽  
Tooth Structure ◽  
Significant Difference ◽  
Conventional Material ◽  
Gap Width ◽  
Ionomer Cement

Background: One over many ways to treat dental caries is by restoration.Glass ionomer cement (GIC) is the restorations material that bonds physically and chemically to tooth structure. GIC has been developed by combining the conventional material with monomer resin, known as resin  modified GIC (RMGIC). Presently, with the development of nano  technology, RMGIC restoration also available in the form of nano   particles, called nanofilled RMGIC (RMGICn). One disadvantage of GIC is the marginal gap which may affects the durability ofrestoration. Purpose: The purpose of this study to compare the marginal gap width of RMGIC and nanofilled RMGIC.Methods: This study used scanning electron microscope (SEM) to observing and measuring the marginal gap width in two kelompoks of 9 maxillary first premolar teeth. The first kelompok restored with RMGIC, the second kelompok restored with nanofilled RMGIC. Following immersion in artificial saliva and the teeth were thermocycled at a temperature of 5oC, 37oC, and 55oC (250 cycles) 1 minute each. Data analysis was done using independent t-test with 95% confidence interval (α = 0.05).Results: Statistical test showed a significant difference for marginal gap width in both kelompok (p = 0.000).Conclusion: There is marginal gap in RMGIC and RMGICn restoration. RMGIC restoration presented lower marginal gap width than RMGIC.

Continuous-flow trapping and localized enrichment of micro- and nano-particles using induced-charge electrokinetics

Soft Matter ◽  
2018 ◽  
Vol 14 (6) ◽  
pp. 1056-1066 ◽  
Author(s):  
Cunlu Zhao ◽  
Chun Yang
Keyword(s):  
Continuous Flow ◽  
Nano Particles ◽  
Induced Charge ◽  
Microfluidic Technique

In this work, we report an effective microfluidic technique for continuous-flow trapping and localized enrichment of micro- and nano-particles by using induced-charge electrokinetic (ICEK) phenomena.

scholarly journals Comparison Study of Various Nano Technology Formulation of Curcumin in Treatment of Alzheimer’s Disease

2020 ◽  
Vol 8 (3) ◽  
pp. 99-103
Author(s):  
Mahaveer Singh ◽  
Kushali D ◽  
Vinay C H
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Delivery System ◽  
Neurodegenerative Disorder ◽  
Therapeutic Potential ◽  
Senile Dementia ◽  
Molecular Complexes ◽  
Nano Particles ◽  
World Health ◽  
Nano Technology

Alzheimer’s disease (AD) is a progressive neurodegenerative disorder associated with cognitive deterioration affecting day to day living and behavioural activities. It is commonest cause of senile and pre-senile dementia. In Alzheimer’s disease, a peptide referred as amyloid beta aggregates (oligomers), and accumulates in the brain to form deposits called as amyloid plaques. According to the world health organization (WHO), 5% of men and 6% of women of above 60 years are victims with Alzheimer’s type dementia globally. In India prevalence of dementia is 33.6%, of which AD contributes approximately 54% and vascular dementia constitutes approximately 39%. Patients with the prolonged use of some Non-steroidal anti-inflammatory (NSAID) drugs such as ibuprofen have lower risk of developing the symptoms of AD; however the chronic use of NSAID can produce a toxic effect on the kidney, liver and GI tract. Recent studies have demonstrated that a curcumin delivery system based on nanoscience and nanotechnology increases the therapeutic potential of this compound. Specifically, several nano-sized carriers such as phospholipid vesicles (liposomes), micelles, solid lipid nanoparticles, polymeric nanoparticles, emulsions, proteins and other molecular complexes have been developed for the efficient delivery of curcumin. Nano particles have demonstrated the enhanced Bioavailability of curcumin including circulation time in the blood. Various nano technology drug delivery system of curcumin showed increased Bio accessibility during treatment of Alzheimer’s disease.  

Classification, synthesis, characterization and biomedical application of nanoparticle: Detailed review

2020 ◽  
Vol 11 (4) ◽  
pp. 7980-7984
Author(s):  
Ranganathan K ◽  
Muruganantham V
Keyword(s):  
Large Scale ◽  
Biomedical Application ◽  
Maximum Growth ◽  
Drug Carriers ◽  
The Body ◽  
Nano Particles ◽  
Scale Production ◽  
Nano Technology ◽  
Nano Science ◽  
Nano Medicine

The branches of science like Nano medicine, Nano technology, Nano chemistry and Nano science are a few of those departments that have the word 'nano' in their name and were frequently published in books and journals and became familiar to the public and the research professionals too. It was an emerging science in the 20th century and is the trend currently. It is not a single isolated technique or method that is applicable in one field, but it is multi-dimensional and is applied in various fields considering the advantages. Its arena ranges from the synthesis, designs, large scale production and potential application of nano-sized materials. They are the systems of a matrix of drug carriers that are uniformly dispersed in the polymeric membranes. This review concentrates on the methods of preparation of nano particles, evaluation methods, advantages and applications of nano particles in medicine. Nanotechnology mostly provides better drug delivery in order to transfer into the smaller parts of the body. This is mostly implemented to enter the ultrathin areas in the body. So, the drugs such as genetic medicine can easily permeated into the cell walls to produce maximum growth within a few more years. The doctors are paid by the patients. The patients who are receiving this therapy shows better bioavailability, decreased drug toxicity, lesser cost of treatment, and extend the life of proprietary drugs.

Comparison of efficacy of biogenic silver nanoparticles using ficus species

2020 ◽  
Vol 4 (1) ◽  
pp. 10-13
Author(s):  
Vishal N Kushare ◽  
Roshan K Pawar ◽  
Sagar V Ghotekar ◽  
Pritishchandra S Kabra
Keyword(s):  
Antibacterial Property ◽  
Medical Application ◽  
Nano Particles ◽  
Nano Particle ◽  
Ficus Religiosa ◽  
Nano Technology ◽  
Ficus Benghalensis ◽  
Current Trends ◽  
Gold Silver ◽  
Ficus Microcarpa

Current trends in the science and medicine is the advent of nano technology. This technology had been in application in the traditional systems of medicine like Ayurveda and Siddha. They adopt this techonology by preparing the nano particles of heavy metals like mercury, gold, silver etc. and use those formulations effectively in curing diseases. Out of the metals that are available to use in medicine, Silver stands as a important and safest yet potent metal that is made as nano particles. It is evident from history that silver is being used as nano particle. It prevents infections and kills microbes and helps store food like milk, wine and vinegar for longer periods. Apart from the electronic and technological application of the nano particles, the pharmaceutical and medical application of the same had been under development. This research will focus on the comparision of the ficus plants like; Ficus religiosa, Ficus benghalensis, Ficus microcarpa, Ficus hispida, Ficus trigona and Ficus citrifolia extracts on the synthesis of the silver nano particles and their antibacterial property.

Synthesis, Characterisation of Al2O3-Cu Nano Composite Powder and Water Based Nanofluids

2011 ◽  
Vol 328-330 ◽  
pp. 1560-1567 ◽  
Author(s):  
S. Suresh ◽  
K.P. Venkitaraj ◽  
P. Selvakumar
Keyword(s):  
Composite Powder ◽  
Hydrogen Reduction ◽  
Nano Particles ◽  
Nano Materials ◽  
Chemical Route ◽  
Nano Composite ◽  
Nano Technology ◽  
Metal Nitrates ◽  
Engineering And Technology ◽  
Water Based

Nano materials have made a revelation in all fields of engineering and technology. Materials of size less than 100 nm are termed as nano materials. The excellent properties of nano materials have attracted the scientists and engineers more towards nano technology. Solid nano particles dispersed in the base fluids such as water or ethylene glycol are called nanofluids, especially used to increase the heat transfer capability of base fluids. In this work we have synthesized Al2O3-Cu nano composite powder in a thermo chemical route that involves the preparation of precursor powder from metal nitrates and hydrogen reduction technique. Two different proportions of precursors were used to obtain the nano composites of two different proportions. The prepared powder was characterised using XRD, SEM and EDS. Water based hybrid nanofluids were prepared and their stability have been studied for different volume concentrations.

Novel Nano and Bio-Based Surfactant Formulation for Hybrid Enhanced Oil Recovery Technologies

2021 ◽  
Author(s):  
Qisheng Ma ◽  
Wenjie Xia ◽  
Yongchun Tang ◽  
Mohamed Haroun ◽  
Md Motiur Rahman ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Nano Particles ◽  
Rock Surface ◽  
Total Production ◽  
The Novel ◽  
Hydrocarbon Production ◽  
Nano Technology ◽  
Surface Active ◽  
Field Deployment

Abstract This investigation presents laboratory and field deployment results that demonstrate the potential candidacy utilizing Nano and bio-technologies to create superior chemicals for novel applications to increase oil recovery from both onshore and offshore reservoirs. Nano-technology is gaining momentum as a tool to improve performance in multiple industries, and has shown significant potential to enhance hydrocarbon production. The laboratory analysis and specifically designed coreflood results indicate there are beneficial interactions at liquid-nano solid interface that increase oil mobility. This will increase the surface activity of chemical surfactants and thereby make them the dominant agents to mobilize and recover oil from oil-bearing reservoirs. Advances in biotechnology offer another rich resource of knowledge for surface active materials that are renewable and more environmental-friendly. In addition, our studies also demonstrate that bio-surfactants are well-suited to provide superior performances in enhancing oil recovery. Nano-particles and biosurfactants may be included with synthetic surfactants to create novel and more efficient surface active agents for enhanced oil recovery. These formulations can promote better flow back of the injected stimulation fluids and additional mobilization to extract more oil from the matrix and micro-fractures. Laboratory experiments demonstrate that the specialized surfactant formulations created, interact with mixed or oil-wet low permeability formations to produce additional oil. Furthermore, this investigation also compares the total production on a candidate field with respect to typical water flood and the novel formulated surfactant approach. For each surfactant treatment, the overall designed injected fluid volume is 1500 m3 (~ 396,000 gallons) with 4 gpt (gallon per thousand unit) of surfactant concentration. Results indicate improved oil production with longer exposure time of the key surfactants within the reservoir. Enhanced surface wetting and super-low interfacial tension (IFT) at lower chemical concentrations are recognized to be the main mechanisms. The novel surfactant also shows stronger sustainability and endurance in keeping rock surface wettability over traditional surfactant system up to 5 times for an 8 PV wash. Furthermore, this can assist to identify and initiate the optimization of the identified mechanisms for potential applications within other compatible reservoirs. A number of successful field applications of EOR with special formulated nano and bio-based surfactant formulation are discussed in this paper. This unique study bridges the gap between the field realized results and lab optimization to enhance feasibility as a function of time and cost.

Modelling and Fabrication of 3-D Carbon-MEMS for Dielectrophoretic Manipulation of Micro/Nanoparticles in Fluids

2009 ◽  
Vol 628-629 ◽  
pp. 435-440 ◽  
Author(s):  
Zi Rong Tang ◽  
M.Rizwan Malik ◽  
Tie Lin Shi ◽  
J. Gong ◽  
L. Nie ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Cross Sections ◽  
Microelectrode Array ◽  
Three Dimensional ◽  
Electrode Array ◽  
Nano Particles ◽  
Nano Technology ◽  
Aspect Ratios ◽  
Carbon Mems

Carbon-MEMS (C-MEMS) have emerged as a new category of devices for micro/nano technology with many potential applications. Dielectrophoretic manipulation of micro/nanoparticles with C-MEMS is studied in this paper. Through electric field distribution modeling in carbon electrode array, we analyze the strongest simulation effect results of electric field in three dimensional (3-D) surface plots depicting the magnitude of electric field in various cross sections at different heights above the channel floor for 2, 10, 30 and 50 μm high carbon electrodes. It is represented here that maximum intensity of electric field generates with the equality between the height above the channel floor and the height of the electrodes. Simulation parameters involved are for dielectrophoretic manipulation of micro/nano particles based on 3-D C-MEMS. The advantages of using 3-D C-MEMS electrodes over other techniques of creating high-throughput systems for dielectrophoretic manipulation environment surrounded by micro/nano horizons are: (i) complex microscale 3-D electrodes with high-aspect ratios can easily be shaped and patterned using conventional lithography (ii) carbon has a high window of stability thus allowing application of higher voltages (iii) there is no need for bulk micromachining or patterning electrodes on multiple planes (iv) the distance between electrodes can precisely be controlled through the lithography process. FEMLAB 3.4 Multiphysics Modeling software (COMSOL, Stockholm, Sweden) is used for the modeling of electric fields and one-layer C-MEMS microelectrode array was fabricated with SU-8 photoresist.

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