نتایج جستجو برای: polyacrylamide hydrogel

تعداد نتایج: 31763  

Journal: :Journal of the American Chemical Society 2004
Anjal C Sharma Tushar Jana Rasu Kesavamoorthy Lianjun Shi Mohamed A Virji David N Finegold Sanford A Asher

We developed a new sensing motif for the detection and quantification of creatinine, which is an important small molecule marker of renal dysfunction. This novel sensor motif is based on our intelligent polymerized crystalline colloidal array (IPCCA) materials, in which a three-dimensional crystalline colloidal array (CCA) of monodisperse, highly charged polystyrene latex particles are polymeri...

2004
Rebecca A. Zangmeister Michael J. Tarlov

Advances in microchip design, coupled with novel bioassays have led to advances in the field of genetic diagnostics. Microfluidic devices offer analytical advantages for samples of low concentration and small sample volume due to directed, efficient mass transport of analytes through microfluidic networks. Although significant advances have been made in genetic assays using micro-arrays, there ...

Journal: :Biosensors & bioelectronics 2010
Mariana S Fernandes Nuno S Dias Alexandre F Silva Jivago S Nunes Senentxu Lanceros-Méndez José H Correia Paulo M Mendes

Wearable devices are used to record several physiological signals, providing unobtrusive and continuous monitoring. These systems are of particular interest for applications such as ambient-assisted living (AAL), which deals with the use of technologies, like brain-computer interface (BCI). The main challenge in these applications is to develop new wearable solutions for acquisition of electroe...

Journal: :ACS central science 2023

Encoded combinatorial library technologies have dramatically expanded the chemical space for screening but are usually only analyzed by affinity selection binding. It would be highly advantageous to reformat outputs ”one-bead-one-compound” solid-phase libraries, unlocking activity-based and cellular capabilities. Here, we describe hydrogel-encapsulated magnetic beads that enable such a transfor...

Journal: :Biomacromolecules 2010
Andrew G Lee Christopher P Arena David J Beebe Sean P Palecek

The mass transport of solutes through hydrogels is an important design consideration in materials used for tissue engineering, drug delivery, and protein arrays used to quantify protein concentration and activity. We investigated the use of poly(ethylene glycol) (PEG) as a porogen to enhance diffusion of macromolecules into the interior of polyacrylamide and PEG hydrogel posts photopatterned wi...

Journal: :Soft matter 2015
Hussain Haider Can Hui Yang Wen Jiang Zheng Jian Hai Yang Mei Xiang Wang Sen Yang Miklós Zrínyi Yoshihito Osada Zhigang Suo Qiqing Zhang Jinxiong Zhou Yong Mei Chen

Most existing magnetic hydrogels are weak and brittle. The development of strong and tough magnetic hydrogels would extend their applications into uncultivated areas, such as in actuators for soft machines and guided catheters for magnetic navigation systems, which is still a big challenge. Here a facile and versatile approach to fabricating highly stretchable, exceptionally tough and notch-ins...

Journal: :Analytical chemistry 2015
Andreas Lesch Fernando Cortés-Salazar Véronique Amstutz Philippe Tacchini Hubert H Girault

Polyacrylamide (PA) based hydrogels are used in several applications including polyacrylamide gel electrophoresis and sensing devices. Homogeneous and compact PA films can be prepared based on chemical or photopolymerization processes. However, the accurate and reproducible coating of substrates with nanohydrogel patterns is challenging due to the in situ polymerization and deposition requireme...

2009
Robert A. Barry Robert F. Shepherd Jennifer N. Hanson Ralph G. Nuzzo Pierre Wiltzius Jennifer A. Lewis

The ability to pattern soft materials at the microscale is critical for several emerging technologies, including tissue-engineering scaffolds, photonic crystals, sensors, and self-healing materials. Hydrogels are an important class of soft materials that can be fabricated in the form of 3D microperiodic structures by colloidal templating or interference lithography. However, neither approach al...

2016
Jingda Tang Jianyu Li Joost J. Vlassak Zhigang Suo John A. Paulson

Rapid advances are taking place to develop hydrogels of high stretchability and toughness, but fatigue fracture has not been studied for any hydrogels. This negligence hinders the development of hydrogels and their applications. Herewe initiate a study of fatigue fracture of hydrogels.We choose polyacrylamide hydrogel as a model material. To place fatigue fracture in context, we apply monotonic...

2014
Xudong Zhang Jinfang Wu Qiming Zhao Dongsheng Mao Xin Lu

Polyacrylamide hydrogel (PAAG), a polymer of the acrylamide monomer, was once thought to be a safe and biocompatible soft tissue filler. It has been widely used in cosmetic procedures, such as breast augmentation and facial contouring, for more than 10 years. However, a number of studies have reported complications of PAAG injection for breast augmentation, including induration of breast tissue...

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