Article
Materials Science, Multidisciplinary
Jiyuan Wu, Reghan J. Hill
Summary: Electroacoustic characterization of Laponite-doped neutralized poly(acrylic acid-co-acrylamide) hydrogels was studied, showing that Laponite doping increased the electroacoustic signal and ionic conductivity but decreased the hydrogel storage modulus. Theoretical models were extended to estimate some parameters of Laponite-doped hydrogels.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Biophysics
Celia Ferrag, Shaopei Li, Keuna Jeon, Nesha May Andoy, Ruby May A. Sullan, Svetlana Mikhaylichenko, Kagan Kerman
Summary: Incorporating different shapes of silver nanoparticles (AgNPs) into a hydrogel matrix enhanced the mechanical properties of the hydrogels. While spherical and triangular AgNPs showed strong antimicrobial activity, hydrogels with rod AgNPs exhibited relatively lower antimicrobial activity.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Gbolahan Afuwape, Reghan J. Hill
Summary: This study investigates the dynamic mobility spectra of nanoemulsion drops in polyacrylamide hydrogels using electrokinetic sonic amplitude. The nanodrop radius in hydrogels is found to be similar to their nanoemulsion counterparts, with frequency-independent shear viscosity and shear modulus. The low-frequency plateau modulus systematically increases with the hexadecane volume fraction.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Runfang Fu, Siyuan Liu, Qianqian Shi, Yan Lu, Zijun Yong, Wenlong Cheng
Summary: This study demonstrates omnidirectional strain engineering of soft plasmene nanosheets using thermoresponsive hydrogels and temperature programming. This method allows for switching the properties of nanosheets between tensile and compressive strain conditions, enabling significant spectral shift and reversibly switchable surface enhanced Raman scattering enhancements.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xiaohui Meng, Yan Qiao, Changwoo Do, Wim Bras, Chunyong He, Yubin Ke, Thomas P. Russell, Dong Qiu
Summary: This research successfully achieved a hysteresis-free material by using a low-crosslink-density polyacrylamide hydrogel with hyperbranched silica nanoparticles. These resilient hydrogels exhibit fatigue-free characteristics under large deformations and can accurately detect dynamic deformations.
ADVANCED MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Hai Zhong, Huiyi Liang, Yanzi Yan, Lei Chen, Tianyu Zhao, Lixin Liu, Yongming Chen
Summary: Chronic inflammation is a major obstacle in refractory diabetic foot ulcers, with high levels of cfDNA playing a crucial role in inflammation. Using cationic hydrogels can significantly reduce cfDNA levels, eliminate inflammation, promote wound closure, and does not introduce systemic toxicity.
Article
Chemistry, Multidisciplinary
Vanessa F. C. Dartora, Julia Sapienza Passos, Blanca Osorio, Ruei-Chun Hung, Michael Nguyen, Aijun Wang, Alyssa Panitch
Summary: In this study, a cell-penetrating MK2 inhibitor peptide YARA was loaded into hollow thermo-responsive nanoparticles and further incorporated into chitosan hydrogels to improve the local delivery and anti-inflammatory activity of the drug for treating atopic dermatitis.
JOURNAL OF CONTROLLED RELEASE
(2023)
Article
Biochemistry & Molecular Biology
Shabnam Sheikhy, Ali Akbar Safekordi, Marjan Ghorbani, Khosro Adibkia, Hamed Hamishehkar
Summary: Researchers successfully modified cellulose, preparing a superdisintegrant with excellent performance for faster disintegration time and suitable drug release condition in prepared tablets. Experimental results indicate that the newly synthesized superdisintegrant has good biocompatibility.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Inorganic & Nuclear
Moeng G. Motitswe, Omolola E. Fayemi, Helen P. Drummond
Summary: The paper presents a cost-effective and environmentally friendly approach for synthesizing gold metal nanoparticles from banana peel extracts. The electrospinning method was utilized to produce stabilized nanofibers of polyacrylonitrile functionalized with green-synthesized gold. Characterization was conducted using spectroscopy and surface morphology techniques, confirming the potential use of the nanocomposite as electrochemical sensors.
JOURNAL OF CLUSTER SCIENCE
(2021)
Article
Chemistry, Physical
Nikita Das, Chandan Maity
Summary: To mimic the activity of natural enzymes, controlled reactivity of reactants or intermediates is necessary in aqueous media. Supramolecular hydrogels can provide an organized medium where reactants or intermediates can have specific orientations, similar to active sites of enzymes. The use of supramolecular hydrogels in catalysis and as nanoreactors allows for efficient chemical transformations in aqueous media.
Article
Polymer Science
Tingting Xu, Huanli Gao, Orlando J. J. Rojas, Hongqi Dai
Summary: In this study, a conductive hydrogel was synthesized using carboxymethyl chitosan and sodium carboxymethyl cellulose as biopolymers, and coupled with conductive polypyrrole through hydrogen bonding. The addition of sodium lignosulfonate facilitated the efficient adsorption and reduction of silver ions, resulting in the embedding of silver nanoparticles in the hydrogel network and improving the electro-catalytic efficiency of the system. The prepared silver nanoparticle-embedded conductive hydrogel electrode showed excellent electro-catalytic activity towards hydroquinone (HQ).
Article
Chemistry, Analytical
Zhiyang Tang, Ke Liu, Zhongqi Hao, Kun Liu, Wen Zhang, Qingzhou Li, Chenwei Zhu, Ji Chen, Xiangyou Li
Summary: This study explored the validity of nanoparticle enhanced MLIBS (NEMLIBS) and proposed a geometric constraint to improve the enhancement factor. Experimental results showed that higher laser energy, larger laser spot diameter, and pre-ablation of solid samples are beneficial for achieving a good enhancement factor. Overall, the practicality of NEMLIBS was discussed through comparisons with traditional MLIBS technology.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Review
Chemistry, Multidisciplinary
Pedro Lavrador, Marco R. Esteves, Vitor M. Gaspar, Joao F. Mano
Summary: Recent advances in the design of stimuli-responsive nanocomposite hydrogels have expanded their potential for operating as advanced systems in various biomedical applications, benefitting from tailored single or multi-responsiveness. The combination of hydrogels and nanoparticles showcases an intrinsic ability to react to external or internal/physiological stimuli, developing intelligent systems with application-oriented features.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xiang-Dong Tian, Yun Zhang
Summary: In this study, we developed an air-water interface mediated co-assembly strategy to prepare flexible 2D superlattices of Au octahedra with tunable orientations. The self-assembly of Au octahedra into different orientations (face-up, edge-up, and vertex-up) was controlled by the surface wettability of the nanoparticles. The SERS performance of the 2D superlattices was studied, and the vertex-up orientation showed the highest enhancement performance and uniformity.
Article
Chemistry, Multidisciplinary
Taeha Lee, Changheon Kim, Jiyeon Kim, Jung Bae Seong, Youngjeon Lee, Seokbeom Roh, Da Yeon Cheong, Wonseok Lee, Jinsung Park, Yoochan Hong, Gyudo Lee
Summary: This study demonstrates a hydrogel complex containing polyaniline nanoparticles, which can be used as a pH sensor and for cancer cell metabolite detection. The complex exhibits rapid chemical reactions and stability, showing potential as a disposable patch-type wearable biosensing platform.