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Freezing DNA for Controlling Bio/nano Interfaces and Catalysis
Juewen Liu
General Chemistry    2019, 5 (4): 190008-190008.   DOI: 10.21127/yaoyigc20190008
Abstract648)      PDF (196KB)(560)       Save
While most DNA-related reactions have been performed in solution, freezing has also been shown to offer interesting properties. DNA oligonucleotides are stretched and aligned in ice and the aligned DNA can quickly, tightly and in some cases densely adsorb on various nanomaterials. In addition, a few ribozymes and DNAzymes have better catalytic activities in ice than in solution. Some of these observations are related to the concentration of salt and DNA in the micropockets formed between ice crystals. With these interesting examples, future research can be devoted to detailed characterization of DNA in ice using in situ measurement methods, and finding their applications in biosensor development, catalysis and origin of life.
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Green Polymers toward Nanobiotechnology(I): Synthesis of Glycopolypeptides and Their Analogues
Zhao Wang, Ana Rute Neves, Filipe Olim, Helena Tomás, Shi Tang, Ruilong Sheng
General Chemistry    2019, 5 (3): 190010-190010.   DOI: 10.21127/yaoyigc20190010
Abstract335)      PDF (225KB)(392)       Save
Harnessing natural-based renewable molecular resources to construct functional synthetic green polymers is a promising research frontier at the interface of sustainable/green chemistry, polymer chemistry and nanobiotechnology. As natural glycoprotein mimics/analogues and biocompatible building blocks of nanobio- materials, synthetic functional glycopolypeptides and their structural/functional analogues have attracted great attentions in recent years. This mini-perspective article reviewed current synthetic strategies and methods of glycopolypeptides and their analogues. The pros and cons of the synthesis protocols were discussed, moreover, possible future perspectives in this field were also stated.
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Assembly-Induced Emission and Stability Enhancement of Cu Nanoparticles
Tingyao Zhou, Jinbin Liu
General Chemistry    2019, 5 (4): 190007-190007.   DOI: 10.21127/yaoyigc20190007
Abstract317)      PDF (227KB)(409)       Save
The exploitation of luminescent Cu nanoparticles (CuNPs) with excellent stability and bright emission is highly desired but still challenging. In this perspective, we concern the significance of aggregation-induced emission (AIE) effect for designing highly luminescent CuNPs, and highlight recent advances for enhancement of stability and emission of the CuNPs using self-assembly approach. Finally, we discuss perspectives and research directions for the fabrication of the highly luminescent assembled CuNPs in the future.
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Nanomaterials for the Adsorptive Removal of Antibiotics from Aqueous Solution: A Minireview
Jamiu. O. Eniola, Rajeev Kumar, M. A. Barakat
General Chemistry    DOI: 10.21127/yaoyigc20190018
Online available: 16 September 2019

Preparation of Dipalmitoyl Phosphatidycholine-Modified Chitosan Nanostructures and Its Application for Enhancing Chromium Adsorption
Ruochen Wang, Fan Yi, Yu Qiao, Gang Huang, Jun Zhu, Dannong He
General Chemistry    2019, 5 (4): 190004-190004.   DOI: 10.21127/yaoyigc20190004
Abstract294)      PDF (663KB)(324)       Save
Chitosan (CTS) nanospheres are successfully modified dipalmitoyl phosphatidycholine (DPPC) through by solvent removal. The physicochemical properties are characterized by dynamic light scattering (DLS), transmission electron microscope (TEM) and fourier transform infrared spectroscopy (FT-IR). Furthermore, the CTS-DPPC nanospheres are used as a novel biosorbent for the application in Cr(VI) absorption, and the effect of pH and additional anions on the Cr(VI) adsorption performance is evaluated. Additionally, CTS-DPPC nanofibers are produced by electrospinning to improve adsorption capacity. The results show that the order of Cr(VI) adsorption performance is CTS-DPPC nanofibers, CTS-DPPC nanospheres and CTS nanospheres, which suggests DPPC is helpful for CTS to remove metal ion. Moreover, X-ray photoelectron spectrophotometer (XPS) analyses indicate that both amino and hydroxyl groups of CTS-DPPC nanospheres are engaged in the adsorption.
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Role of Oxygen Defects on Photoelectrochemical Activity of ZnO Nanorods Grown on Transparent Conducting Oxide Thin Film
Hasmat Khan, Srikrishna Samanta, Malobi Seth, Sunirmal Jana
General Chemistry    2020, 6 (3): 190025-190025.   DOI: 10.21127/yaoyigc20190025
Abstract168)      PDF (1155KB)(291)       Save
ZnO nanorods (NRs) were grown onto ZnO seed layer deposited FTO glass substrate via hydrothermal technique at ~95 °C. The as-deposited samples were further heat-treated at ~400 °C in a furnace under air at-mosphere. With varying time, the kinetic study of the growth of ZnO towards NRs formation was also performed. To enhance oxygen defects such as oxygen vacancy in the NRs, the thermally cured samples were further heat-treated in 5% H2 gas atmosphere at ~350 °C. Morphological and microstructural analyses, estimation of oxygen vacancy in the samples were carried out by field emission scanning and transmission electron mi-croscopies and X-ray photoelectron spectroscopy, respectively. Moreover, the optical properties of the specimen were also characterized by photoluminescence spectral study. A co-relation was also made between the reduced gas treatment time and the photoelectrochemical (PEC) activity of the samples. The ZnO NRs synthesized by optimizing the time for the growth of NRs and the reduced gas treatment time exhibited sig-nificant improvement in PEC activity. This work could make an avenue for enhancing the PEC activity of other hierarchically structured metal oxide semiconductors.
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Optical and Magnetic Properties of Superparamagnetic Fe 3O 4 Colloidal Nanoparticles
B. K. Pandey, A. K. Shukla, R. K. Kotanala, J. Shah, and R. Gopala
General Chemistry    DOI: 10.21127/yaoyigc20200006
Online available: 04 June 2020

Crosslinked Polymer Nanoassemblies and Their Delivery Applications
Zhao Wang, Filipe Olim, Ana Rute Neves, Mariana Vieira, Jingjing Sun, Helena Tomás, and Ruilong Sheng
General Chemistry    2021, 7 (3): 210007-210007.   DOI: 10.21127/yaoyigc20210007
Abstract181)      PDF (690KB)(137)       Save
Chemical crosslinking technology was rapidly developed and utilized to prepare structurally fixed, stabilized and functionalized polymer nanoassemblies and nanoarchitectures by covalently reinforcing the interactions between the polymer chains. This perspective reviewed recent advances on the crosslinked polymer nanoassemblies and their applications, mainly in drug delivery. Moreover, possible future research outlooks in the field of Shell-crosslinked polymer nanoassemblies were also stated and discussed.
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Green Polymers toward Nanobiotechnology (II): Natural Polysaccharides and Their Derivatives towards Immunomodulation
Ruilong Sheng, Noora Barzkar, and Zhao Wang
General Chemistry    2022, 8 (1-2): 220001-220001.   DOI: 10.21127/yaoyigc20220001
Abstract145)      PDF (814KB)(93)       Save
Using renewable natural polymer resources to develop functional therapeutics and nanomedicine is a sustainable research area at the interface of multidisciplinary subjects such as green chemistry, polymer science and technology, nanobiomaterial and clinical medicine. It is disclosed that natural polysaccharides and their derivatives exhibited good biocompatibility, promising drug/gene delivery efficiency and immunomodulation capability, which have attracted tremendous attention in recent decades. This article reviewed up to date progresses of various natural polysaccharides and their derivatives as immunomodulators. The impact of molecular factors on immunomodulation-related features were stated, moreover, possible future outlooks on the natural polysaccharide-based immunomodulators were also discussed.
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