نتایج جستجو برای: nanoparticle

تعداد نتایج: 30903  

Journal: :Langmuir : the ACS journal of surfaces and colloids 2008
Angel T Chan Jennifer A Lewis

We investigate the interparticle interactions and phase behavior of microsphere-nanoparticle mixtures of high charge asymmetry and varying size ratio. In the absence of nanoparticles, negligibly charged microspheres flocculate as a result of van der Waals interactions. Upon addition of a lower critical nanoparticle volume fraction, the microspheres are stabilized by the formation of nanoparticl...

2017
Masashi Ohno Atsushi Nishida Yoshihiko Sugitani Kyohei Nishino Osamu Inatomi Mitsushige Sugimoto Masahiro Kawahara Akira Andoh

BACKGROUND AND AIMS Curcumin is a hydrophobic polyphenol derived from turmeric, a traditional Indian spice. Curcumin exhibits various biological functions, but its clinical application is limited due to its poor absorbability after oral administration. A newly developed nanoparticle curcumin shows improved absorbability in vivo. In this study, we examined the effects of nanoparticle curcumin (n...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Marie-Eve Aubin-Tam Wonmuk Hwang Kimberly Hamad-Schifferli

Although nanoparticle-protein conjugates have been synthesized for numerous applications, bioconjugation remains a challenge, often resulting in denaturation or loss of protein function. This is partly because the protein-nanoparticle interface is poorly understood, which impedes the use of nanoparticles in nanomedicine. Although the effects of nanoparticle ligand and material on protein struct...

Journal: :Magnetic resonance in medicine 2009
Priti Balchandani Mayumi Yamada John Pauly Phillip Yang Daniel Spielman

MRI has been used extensively to noninvasively track the location of cells labeled with superparamagnetic iron-oxide nanoparticles (SPIOs) in vivo. Typically, SPIOs are employed as a negative contrast agent which makes it difficult to differentiate labeled cells from extraneous sources of inhomogeneity and actual voids in the image. As a result, several novel approaches have been put forth to o...

Journal: :ACS nano 2011
Longyan Yuan Junjie Dai Xiaohong Fan Ting Song Yu Ting Tao Kai Wang Zhi Xu Jun Zhang Xuedong Bai Peixiang Lu Jian Chen Jun Zhou Zhong Lin Wang

Highly flexible, robust, and sensitive infrared nanosensors were fabricated based on carbon nanoparticles that were synthesized through a simple and low-cost flame method. The infrared nanosensor devices showed sharp infrared photoresponse with a response time of ∼68 ms and a maximum photocurrent change of ∼52.9%. The devices showed a superhydrophobic property with a contact angle larger than 1...

2011
Richard Charnigo Mathieu Francoeur Patrick Kenkel M. Pinar Mengüç Benjamin Hall Cidambi Srinivasan

Solving the inverse problem of nanoparticle characterization has the potential to advance science and benefit society. While considerable progress has been made within a framework based on the scattering of surface plasmon-polaritons, an aspect not heretofore considered is the quantification of uncertainty in the estimation of a nanoparticle characteristic. Therefore, the present article offers...

2005
Gautam Dalwadi Heather A. E. Benson Yan Chen

Purpose. The study reports evaluation of different purification processes for removing surplus surfactant and formulating stable nanoparticle dispersions. Methods. Nanoparticle formulations prepared from poly(D,L-lactide-co-glycolide) and polyvinyl alcohol (PVA) were purified by a diafiltration centrifugal device (DCD), using 300K and 100K molecular weight cut-off (MWCO) membranes and a tangent...

2012
Mingguang Li Zoi Panagi Konstantinos Avgoustakis Joshua Reineke

Biodistribution of nanoparticles is dependent on their physicochemical properties (such as size, surface charge, and surface hydrophilicity). Clear and systematic understanding of nanoparticle properties' effects on their in vivo performance is of fundamental significance in nanoparticle design, development and optimization for medical applications, and toxicity evaluation. In the present study...

Journal: :The Journal of chemical physics 2009
Marianne Seijo Martin Pohl Serge Ulrich Serge Stoll

The formation of complexes between nanoparticles and polyelectrolytes is a key process for the control of the reactivity of manufactured nanoparticles and rational design of core shell nanostructures. In this work, we investigate the influence of the nanoparticle dielectric constant on the adsorption of a linear charged polymer (polyelectrolyte) at the surface of a neutral nanoparticle. The pol...

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