نتایج جستجو برای: inorganic nanoparticles

تعداد نتایج: 179608  

Journal: :Nature chemistry 2010
Kosuke Suzuki Sota Sato Makoto Fujita

One of the key challenges in materials science is to control the size and shape of inorganic nanoparticles with a high degree of precision, as these parameters have a significant influence on the nanoparticles' properties and potential applications. Here, we describe the preparation of highly monodisperse silica nanoparticles smaller than 5 nm in diameter by using self-assembled, hollow, spheri...

Journal: :Frontiers in bioscience 2014
Dong-yan Huang Yang-long Hou Shi-ming Yang Rong-guang Wang

The quality of life of patients with head and neck squamous cell carcinoma (HNSCC) has been improved because of advances in surgical and radiotherapeutic techniques as well as organ-preservation methods. Despite such progresses, survival rates are dismal because of frequent recurrences, distant metastases and the development of secondary primary tumors. Nanoparticles have distinct characteristi...

2018
Hagit Sade Alexey Moshkovich Jean-Paul Lellouche Lev Rapoport

Nanoparticles of transition metal dichalcogenides (TMDC) have been known to reduce friction and wear when added to oil-type liquid lubricants. Aggregation limits the ability of the nanoparticles to penetrate into the interface between the two rubbing surfaces—an important factor in friction reduction mechanisms. Doping has been successfully used to reduce agglomeration, but it must be done in t...

2011
Se Gyu Jang Edward J. Kramer Craig J. Hawker

Ligand molecules tethered on the surface of inorganic nanoparticles play an important role in the synthesis and application of nanoparticles due to their dramatic influence over surface properties. Tailoring of nanoparticle surfaces with ligands is therefore a key factor for stabilizing nanoparticles in various solvents as well as for controlling hierarchical assembly of nanoparticles to give f...

2011
Rochelle R. Arvizo Oscar R. Miranda Daniel F. Moyano Chad A. Walden Karuna Giri Resham Bhattacharya J. David Robertson Vincent M. Rotello Joel M. Reid Priyabrata Mukherjee

BACKGROUND Inorganic nanoparticles provide promising tools for biomedical applications including detection, diagnosis and therapy. While surface properties such as charge are expected to play an important role in their in vivo behavior, very little is known how the surface chemistry of nanoparticles influences their pharmacokinetics, tumor uptake, and biodistribution. METHOD/PRINCIPAL FINDING...

2010
Quanshui Li Lijin Xia Zhili Zhang Mingjun Zhang

Though much research has been conducted for nanoparticles, naturally occurring nanoparticles have not yet been well explored for their diverse properties and potential applications. This paper reports the optical absorption and scattering properties of nanoparticles secreted by English ivy. Both experimental and theoretical studies have been conducted. Strong ultraviolet extinction and excellen...

2011
Hiroshi Yabu Ayako Endo Kazutaka Koike Kiwamu Motoyoshi Takeshi Higuchi Masatsugu Shimomura

The preparation of size-controlled CdS nanoparticles in block copolymer micelles and formation of composite particles of CdS nanoparticles and polymers are described in this paper. Uniformly sized CdS nanoparticles with different emission wavelengths were successfully synthesized. In addition, composite Janus particles, unidirectionally stacked lamellae particles and onion particles were formed...

Journal: :Journal of Alzheimer's disease : JAD 2012
Francisco C Pérez-Martínez Blanca Carrión Valentín Ceña

Nanoparticles represent an alternative to viral vectors for genetic material transfer to the nervous system. However, to increase transfection efficiency in the central nervous system and to decrease toxicity, the design of nanoparticles needs to be improved to enhance blood-brain barrier crossing and endosomal escape. This paper reviews the strategies used to solve these difficulties and cover...

2015
Somaia Said Abd El-Karim Magdy Ibrahim El-Zahar Manal Mohamed Anwar

Nanotechnology refers to research and technology development at the atomic, molecular, and macromolecular scale, leading to the controlled manipulation and study of structures and devices with length scales in the 1-100 nanometers range. Objects at this scale, such as “nanoparticles,” take on novel properties and functions that differ markedly from those seen in the bulk scale. The small size, ...

2017
Wenjing Zhang Chengchen Xu Gen-Quan Yin Xian-En Zhang Qiangbin Wang Feng Li

Virus-based nanoparticles (VNPs) can serve as containers for inorganic nanomaterials with excellent physical and chemical properties. Incorporation of nanomaterials inside the inner cavity of VNPs has opened up lots of possibilities for imaging applications in the field of biology and medicine. Encapsulation of inorganic nanoparticles (NPs) in VNPs can achieve the labeling of VNPs with nanoprob...

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