In situ loading of Ag nanocontacts onto silica nanospheres: a SERS platform for ultrasensitive detection

Polypropylene nanocomposites containing silica nanospheres based on the sol-gel methods were produced viain situpolymerization using a rac-Et(Ind)2ZrCl2/methylaluminoxane (MAO) system. Two different routes were used depending on the interaction between the silica nanoparticles with the catalytic system. In route 1 the nanoparticles were added together with the catalytic system (rac-Et(Ind)2ZrCl2)/(MAO) directly into the reactor, and in route 2 the metallocene rac-Et(Ind)2ZrCl2was supported on silica nanospheres pretreated with (MAO). SEM images show that when the nanospheres were added by both routes, they were replicated in the final polymer particle morphology; this phenomenon was more pronounced for PP obtained by route 2. The polypropylene (PP) nanocomposites obtained by both routes had a slightly higher percent crystallinities and crystallinity temperatures than pure PP. Transmission electron microscopy (TEM) images show that the nanospheres were well dispersed into the polypropylene matrix, particularly in the nanocomposites obtained by the support system (route 2).

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In situ enzymatic silver enhancement based on functionalized graphene oxide and layer-by-layer assembled gold nanoparticles for ultrasensitive detection of thrombin

Biosensors and Bioelectronics ◽

10.1016/j.bios.2012.04.046 ◽

2012 ◽

Vol 38 (1) ◽

pp. 50-54 ◽

Cited By ~ 29

Author(s):

Yan Wang ◽

Ruo Yuan ◽

Yaqin Chai ◽

Yali Yuan ◽

Lijuan Bai

Keyword(s):

Gold Nanoparticles ◽

Graphene Oxide ◽

Ultrasensitive Detection ◽

Layer By Layer ◽

Functionalized Graphene ◽

Silver Enhancement ◽

Functionalized Graphene Oxide

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Synthesis of Surface-Modified Oil-Soluble Silica Nanospheres and Investigation of their Tribological Behavior

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.266.30 ◽

2011 ◽

Vol 266 ◽

pp. 30-33 ◽

Cited By ~ 2

Author(s):

Xiao Hong Li ◽

Jing Jing Huang ◽

Tian Cong Cai ◽

Zhi Jun Zhang

Keyword(s):

Electron Microscope ◽

Tribological Behavior ◽

Engine Oil ◽

Silica Nanospheres ◽

Covalent Bonds ◽

Transmission Electron ◽

Soluble Silica ◽

Promising Application ◽

Surface Modified

Silica nanospheres with good dispersibility in oily solvents were prepared using a facile in-situ surface-modification route. The microstructure of resultant surface-capped silica nanospheres was analyzed with a transmission electron microscope. The tribological behavior of the silica nanospheres as additive in engine oil SE 15W/40 was evaluated using a four-ball machine; and the morphology and composition of the worn steel surfaces were analyzed using a scanning electron microscope equipped with an energy dispersive X-ray analysis attachment. It was found that organic modifier hexamethyldisilazane (HMDS) was combined with nano-SiO2 by covalent bonds, resulting in varied surface properties and improved dispersibility of the nanoparticles in many organic mediums. Besides, oil-soluble silica nanospheres as additive in the engine oil had excellent friction-reducing and antiwear abilities, showing promising application prospect.

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In Situ Electrodeposited Synthesis of Electrochemiluminescent Ag Nanoclusters as Signal Probe for Ultrasensitive Detection of Cyclin-D1 from Cancer Cells

Analytical Chemistry ◽

10.1021/acs.analchem.7b01154 ◽

2017 ◽

Vol 89 (12) ◽

pp. 6787-6793 ◽

Cited By ~ 34

Author(s):

Ying Zhou ◽

Maoxin Chen ◽

Ying Zhuo ◽

Yaqin Chai ◽

Wenju Xu ◽

...

Keyword(s):

Cyclin D1 ◽

Cancer Cells ◽

Ultrasensitive Detection ◽

Signal Probe ◽

Ag Nanoclusters

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DNA-templated in situ growth of silver nanoparticles on mesoporous silica nanospheres for smart intracellular GSH-controlled release

Chemical Communications ◽

10.1039/c5cc00557d ◽

2015 ◽

Vol 51 (30) ◽

pp. 6544-6547 ◽

Cited By ~ 23

Author(s):

Changhui Liu ◽

Zhihe Qing ◽

Jing Zheng ◽

Li Deng ◽

Cheng Ma ◽

...

Keyword(s):

Silver Nanoparticles ◽

Controlled Release ◽

Mesoporous Silica ◽

In Situ Growth ◽

Silica Nanospheres ◽

Mesoporous Silica Nanospheres

AgNPs are prepared in situ by the DNA-templated process as tunable gatekeepers for mesoporous silica nanocontainers for smart intracellular GSH-controlled release.

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