Article
Chemistry, Analytical
Antoine Dowek, Florent Voisin, Laetitia Le, Celine Tan, J. M. Mallet, Florent Carn, Eric Caudron
Summary: This study focuses on the improvement and control of SERS analysis by optimizing the aggregation/self-assembly of AuNPs using quaternized chitosan. The results show that the use of polyelectrolyte chains can stabilize neutral AuNPs aggregates, leading to significant enhancement of Raman signal. The stable and sensitive measurements of epinephrine at low concentrations were achieved, and the signal remained stable in complex media such as isotonic sodium chloride and glucose.
Review
Chemistry, Physical
Rituraj Borah, A. G. Karthick Raj, Antony Charles Minja, Sammy W. Verbruggen
Summary: The synthesis and self-assembly of functional nanoparticles have attracted significant attention in recent years. The self-organization of nanoparticles into ordered structures is important for creating functional interfaces and enhancing their properties. This review provides an overview of recent developments in nanoparticle self-assembly and discusses their applications. Different techniques for obtaining these nanostructures and their impact on performance are also discussed.
Article
Chemistry, Multidisciplinary
Siham Atifi, Mehr-Negar Mirvakili, Cyan A. Williams, Melanie M. Bay, Silvia Vignolini, Wadood Y. Hamad
Summary: Cellulose nanocrystals (CNCs) are functional materials with distinct properties that can be used in the fabrication of photonic, optoelectronic, and functional hybrid materials. By using electrophoretic deposition (EPD)-induced self-assembly, photonic films with long-range chirality can be produced on conductive, rigid, or flexible substrates within a few minutes.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Michal Szuwarzynski, Lukasz Mazur, Mariusz Borkowski, Krzysztof Mackosz, Konrad Gizynski, Tomasz Mazur
Summary: Polymer stamping is a reliable and cost-effective method for producing charged patterned surfaces. The stability of the charge is limited, but by using polyelectrolytes as the stamping medium, the stability can be increased. This method allows for the production of high-resolution microstructures. Overall, this technique has a significant impact and is given a rating of 7 out of 10.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Peng Ding, Lusha Chen, Cheng Wei, Wenjuan Zhou, Chendan Li, Jiahua Wang, Mingwei Wang, Xuhong Guo, Martien A. Cohen Stuart, Junyou Wang
Summary: A novel strategy for preparing stable coacervate nanoparticles, termed electrostatic assembly directed polymerization (EADP), is proposed in this study. The nanoparticles exhibit high salt stability and scalability, with tunable size and properties, allowing for scaled-up production.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Henrik Siegel, Alessio J. Sprockel, Matthew S. Schwenger, Jesse M. Steenhoff, Iske Achterhuis, Wiebe M. de Vos, Martin F. Haase
Summary: Ultrafiltration membranes are crucial for producing freshwater in a water-scarce world. A recent method called solvent transfer induced phase separation (STrIPS) has been used to create porous membranes. This study investigates the dynamics of hollow fiber structure evolution during STrIPS and demonstrates the separation performance of the resulting membrane in ultrafiltration.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Florencia A. Gulotta, Veronica Paz Zanini, Beatriz A. Lopez de Mishima, Debora M. Martino, Omar E. Linarez Perez, Nancy F. Ferreyra
Summary: In this study, self-assembled structures of gold nanoparticles were built using a new polyelectrolyte. The optical and electrochemical properties of the structure were explored for potential sensor applications. Surface plasmon resonance and atomic force microscopy revealed the distribution and electromagnetic coupling of the AuNPs in different polymer forms.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Jiadi Jiang, Er-Qiang Chen, Shuang Yang
Summary: This study investigates the self-assembly process of incorporating oppositely charged polyelectrolytes into a block copolymer system, predicting phase behavior through self-consistent field theory considering the ion pairing effect. The results show that the pairing between oppositely charged blocks drives microphase separation, while pairing between charged monomers and counterions competes and suppresses this phenomenon. The addition of salt shields polymer charges, hindering microphase separation.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Engineering, Environmental
Jing Yang, Di Zhao, Decui Yao, Yige Wang, Huanrong Li
Summary: Supramolecular self-assembly induced by lanthanide ions (Ln(3+)) was used to create functional luminescent materials with fast self-healing and good mechanical performance, showing promising applications in smart sensors. The materials exhibit reversibly responsive fluorochromic properties and high stretchability, providing new insights for the development of e-skin and smart optical devices.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Dong Hyup Kim, Ahram Suh, Geonhyeong Park, Dong Ki Yoon, So Youn Kim
Summary: Nanoscratch-directed self-assembly (DSA) is introduced as a simple and scalable strategy to achieve highly aligned block copolymer (BCP) nanopatterns over a large area, allowing versatile nanofabrication for various functional nanomaterials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ksenia Maleeva, Daler Dadadzhanov, Alena Palekhova, Ilia Kaliya, Anton Tkach, Alexander Baranov, Kirill Bogdanov
Summary: We have developed a self-assembled plasmonic film consisting of 20 nm gold nanoparticles and a protective polymer matrix, which enables detection of SERS signals in various environments, pH ranging from 3 to 9, and high temperature up to 150 degrees C. This SERS substrate serves as a sensing platform with retained enhancement characteristics when transferred from stationary spectroscopy to microfluidic systems, and it can be reused and quickly respond to changes in analytes. Our SERS-based sensor has demonstrated clear visibility for real analytes, even at a concentration as low as 10(-5) M.
Article
Polymer Science
Christos Gioldasis, Apostolos Gkamas, Othonas A. Moultos, Costas Hristos Vlahos
Summary: In this study, the chemical feedback between building blocks in the templated polymerization of diblock copolymers and their consecutive micellization was investigated using coarse-grained molecular dynamics simulations. The simulation results were in agreement with experimental findings, showing that templated micellization forms more spherical micelles with a smaller radius of gyration compared to traditional two-step micellization. Molecular simulation offers advantages over traditional kinetic models by allowing for a detailed study of heterogeneous polymerization in the presence of oppositely charged templates and accounting for the incompatibility between reacted species, which has a significant influence on the reaction process.
Article
Biophysics
Han-Wen Cheng, Shan Yan, Guojun Shang, Shan Wang, Chuan-Jian Zhong
Summary: Harnessing the interparticle spatial properties of surface assembly of nanoparticles on flexible substrates for highly-sensitive strain sensors is a rapidly emerging area of research, with promising potential for wearable applications. The 3D structural tunability of interparticle spatial properties at both molecular and nanoscale levels in SANs is transformative for designing intriguing strain sensors. The controllability of nanoparticle size, shape, and composition, along with tunability of electrical properties through interparticle spatial properties, highlight the design advancements of SAN-derived strain sensors for wearable biosensors and bioelectronics.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Jianpeng Liu, Shan Jiang, Wennan Xiong, Chen Zhu, Kan Li, YongAn Huang
Summary: A novel assembly strategy utilizing kirigami design and self-healing materials is proposed for conformal integration of electronics on complex curvilinear surfaces, allowing non-stretchable materials to wrap around curved surfaces and maintain electrical conductivity for functional materials. The transformation from planar kirigami sheets to spherical surfaces is demonstrated and the strategy shows potential applications through examples like a conformal heater and a wind sensing system.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Applied
Zhe Xiao, Lin-Hao Liu, Teng Liu, Dan Yang, Xiang Jia, Yu-Kun Du, Shuo-Qi Li, Wen-Jiu Yang, Yong-Ming Xi, Rong-Chang Zeng
Summary: Polyelectrolyte-coated magnesium alloy was prepared using layer-by-layer assembly with poly(allylamine hydro-chloride) (PAH) and sodium alginate (ALG). The influence of genipin as a crosslinking agent on the coatings' microscopic features and corrosion resistance was examined. The results showed that the crosslinked coating exhibited improved anticorrosive property and enhanced cytocompatibility, suggesting that crosslinking treatment could improve the performance of LbL assembled multilayer coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
