Jizhen Zhang

Jizhen Zhang
Deakin University · Institute for Frontier Materials (IFM)

Doctor of Philosophy
2D nanomaterials synthesis and characterization, macro-structure assembling and control, in-situ synchrotron radiation.

About

62
Publications
19,604
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2,194
Citations
Citations since 2017
45 Research Items
2078 Citations
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800

Publications

Publications (62)
Article
MXenes, two-dimensional (2D) transition-metal carbides and nitrides with high electrical conductivity, show outstanding potential for energy storage applications. However, the aggregation and restacking of 2D MXene nanosheets seriously decrease the performance of MXene-based electrodes. Instead of using high-cost artificial templates, herein, we se...
Article
Various Janus structures-enabled physicochemical properties of biological materials inspire researchers to explore functional films with Janus characteristics in compositions and structures. It is highly desirable to explore such Janus functional films in simple, cost-effective and batch-production strategy. In this work, we present a natural sedim...
Article
Ti3C2Tx MXene is a promising active material for developing fiber-based devices due to its exceptional electrical conductivity and electrochemical capacitance. However, fabricating robust fibers with high MXene content remains challenging due to shortcomings such as low interfacial adhesion between sheets and shrinkage-induced sheet disorientation...
Article
Mechanically strong and electrically conducting fibers, particularly those with high specific capacitances, are promising fiber-shaped electrodes for fiber- and textile-based energy storage devices like fiber-shaped supercapacitors (FSCs). However, a high loading of fillers or bridging agents is commonly required to fabricate fiber electrodes with...
Article
Full-text available
Sensors, as one of the crucial components of wearable electronics, have attracted much attention due to their extensive application in healthcare, human–machine interfaces, electronic skins (E-skins), rehabilitation, and internet of things. However, there is still a challenge to fabricate flexible strain sensors with both good sensitivity and large...
Article
Wearable electronics demand energy storage devices with high energy density and fast charging‐discharging rates. Although various porous electrodes have been constructed, the effect of pore size on the capacitive performance of 2D nanomaterials has been rarely studied. Herein, flexible MXene foams with significantly different pore structures are fa...
Cover Page
Full-text available
In article number 2200114, we report a sequential bridging (SB) method of fortifying MXene, leading to dense, free-standing films of interconnected flakes, with significantly enhanced toughness and flexibility, without compromising electrical conductivity or electrochemical capacitance.
Article
Ti3C2Tx MXene (or “MXene” for simplicity) has gained noteworthy attention for its metal‐like electrical conductivity and high electrochemical capacitance – a unique blend of properties attractive towards a wide range of applications such as energy storage, healthcare monitoring and electromagnetic interference shielding. However, processing MXene a...
Article
MXene inks are promising candidates for fabricating conductive circuits and flexible devices. Here, MXene inks prepared from solvent mixtures demonstrate long-term stability which can be employed in commercial rollerball pens to write circuits on flexible substrates. Such circuits exhibit fast, accurate capacitive response for touch-board and water...
Article
Through material innovation, nanoscale structural design and hybrid manufacturing methods, great efforts have been made in developing high-performance energy storage systems. Two-dimensional (2D) nanomaterials, such as MXene, can be applied to such energy storage devices and give paly to their potential enormous advantages. In order to achieve bett...
Article
The liquid crystal (LC) phases of two-dimensional (2D) transition metal carbides/nitrides (MXenes) have enabled the production of their unique macro-architectures with an ordered microstructure and enhanced properties. However, LC phases in additive-free MXene dispersions are known to occur above relatively high sheet size and concentration thresho...
Article
Regenerated silk fibers typically fall short of silkworm cocoon fibers in mechanical properties due to reduced fiber crystal structure and alignment. One approach to address this has been to employ inorganic materials as reinforcing agents. The present study avoids the need for synthetic additives, demonstrating the first use of exfoliated silk nan...
Article
The exciting combination of high electrical conductivity, high specific capacitance and colloidal stability of two-dimensional Ti3C2Tx MXene (referred to as MXene) has shown great potential in a wide range of applications including wearable electronics, energy storage, sensors, and electromagnetic interference shielding. To realize its full potenti...
Article
Full-text available
Piezoelectric fluoropolymers convert mechanical energy to electricity and are ideal for sustainably providing power to electronic devices. To convert mechanical energy, a net polarization must be induced in the fluoropolymer, which is currently achieved via an energy-intensive electrical poling process. Eliminating this process will enable the low-...
Cover Page
Full-text available
Translating the excellent properties of two‐dimensional Ti3C2Tx MXene sheets into bulk architectures, both pure and composite, remains challenging due to several factors, including poor inter‐sheet connectivity, uncontrolled spacing and sheet‐misalignment In article number 2002043, Ken Aldren S. Usman, Jizhen Zhang, Joselito M. Razal, and co‐worker...
Article
Lithium (Li) metal is widely accepted as the most promising anode for next-generation batteries due to its highest theoretical capacity (3,860 mA h g⁻¹) and lowest electrochemical potential (−3.04 V versus standard hydrogen electrode). However, Li-metal anodes suffer from low Coulombic efficiency and safety issues, due to the high activity and unco...
Article
Superelastic aerogels with excellent electrical conductivity, reversible compressibility, and high durability hold great potential for varied emerging applications, ranging from wearable electronics to multifunctional scaffolds. In the present work, superelastic MXene/reduced graphene oxide (rGO) aerogels are fabricated by mixing MXene and GO flake...
Article
Tremendous efforts have been dedicated towards high-performance energy storage devices though material innovation, nanoscale structural design and hybrid fabrication approaches. A crucial technique to tune the properties of nanomaterials, such as MXene, is through introducing defects or heteroatom dopants. To improve the level of nitrogen dopant, a...
Article
The outstanding electrical conductivity and high specific capacitance of 2D Ti3C2Tx MXene have made them promising materials for a wide range of applications including wearable electronics, energy storage, sensors, and electromagnetic interference shielding. However, the fabrication of MXene architectures, both pure and composite, often results in...
Preprint
Full-text available
Piezoelectric fluoropolymers convert mechanical energy to electricity and are ideal for sustainably providing power to electronic devices. To convert mechanical energy, a net polarization must be induced in the fluoropolymer, which is currently achieved via an energy intensive electrical poling process. Eliminating this process will enable the low-...
Article
Low-molecular weight (LMW) silk was utilized as a LMW silk plasticizer for regenerated silk, generating weak physical crosslinks between high-molecular weight (HMW) silk chains in the amorphous regions of a mixed solution of HMW/LMW silk. The plasticization effect of LMW silk was investigated using mechanical testing, Raman spectroscopy, and wide-a...
Article
Full-text available
Textile devices have benefited from the discovery of new conductive materials and innovations in textile device design. These devices include textile‐based supercapacitors (TSCs), encompassing fiber, yarn, and fabric supercapacitors, which have demonstrated practical value in powering wearable devices. Recent review articles have highlighted the li...
Article
We demonstrate the first use of pure films of two dimensional (2D) transition metal carbides and nitrides (Ti 3 C 2 T x MXene) as a novel electrode material for electrogenerated chemiluminescence (ECL). The Ti 3 C 2 T x ...
Article
Full-text available
Free‐standing films that display high strength and high electrical conductivity are critical for flexible electronics, such as electromagnetic interference (EMI) shielding coatings and current collectors for batteries and supercapacitors. 2D Ti3C2Tx flakes are ideal candidates for making conductive films due to their high strength and metallic cond...
Article
Full-text available
In article number 2001093, Joselito M. Razal and co‐workers demonstrate that ordered domains of additive‐free Ti3C2Tx MXene liquid crystals can be processed into micrometer‐thin films that do not compromise mechanical properties for electrical conductivity, enabling the development of high‐performance devices and new applications.
Article
Electroactive yarns that are stretchable are desired for many electronic textile applications, including energy storage, soft robotics, and sensing. However, using current methods to produce these yarns, achieving high loadings of electroactive materials and simultaneously demonstrating stretchability is a critical challenge. Here, a one‐step bath...
Article
Anyone clicking on this link before March 10, 2020 will be taken directly to the final version of the article on ScienceDirect, which they are welcome to read or download. No sign up, registration or fees are required. https://authors.elsevier.com/a/1aRF6,3psrzpg1
Article
The discovery of liquid crystalline (LC) phases in dispersions of two-dimensional (2D) materials has enabled the development of macroscopically aligned three-dimensional (3D) macrostructures. Here, we report the first experimental observation of self-assembled LC phases in aqueous Ti3C2T x MXene inks without using LC additives, binders, or stabili...
Article
Full-text available
2D transition metal carbides and nitrides called "MXene" are recent exciting additions to the 2D nanomaterials family. The high electrical conductivity, specific capacitance, and hydrophilic nature of MXenes rival many other 2D nanosheets and have made MXenes excellent candidates for diverse applications including energy storage, electromagnetic sh...
Article
Highly conductive, strong and flexible fibers are important for the realization of many high technological applications including smart textiles, flexible electrodes, and fast-response sensors and actuators. Here, we report a facile one-step method to produce highly conducting poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) fi...
Article
In article number 1804732, Shayan Seyedin, Joselito M. Razal, and co‐workers make a class of flexible and highly conductive fibers from MXene and PEDOT:PSS that when fabricated into elastic energy storing devices demonstrate high performance even when stretched multiple times. This work provides a promising energy storage solution for powering mini...
Article
Fiber‐shaped supercapacitors (FSCs) are promising energy storage solutions for powering miniaturized or wearable electronics. However, the scalable fabrication of fiber electrodes with high electrical conductivity and excellent energy storage performance for use in FSCs remains a challenge. Here, an easily scalable one‐step wet‐spinning approach is...
Article
In article number 1802225, Joselito M. Razal and co‐workers fabricate MXene‐based yarn‐shaped supercapacitors via biscrolling, which show ultrahigh MXene loading, excellent flexibility, and superior energy storage performance. The biscrolled MXene yarns with outstanding specific capacitance and energy density can potentially provide the energy solu...
Article
Yarn‐shaped supercapacitors (YSCs) once integrated into fabrics provide promising energy storage solutions to the increasing demand of wearable and portable electronics. In such device format, however, it is a challenge to achieve outstanding electrochemical performance without compromising flexibility. Here, MXene‐based YSCs that exhibit both flex...
Article
The development of wearable devices such as smart watches, intelligent garments, and wearable health‐monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber‐based supercapacitors are emerging as a promising candidates for thi...
Article
The increasing developments in wearable electronics demand for compatible power sources such as yarn supercapacitors (YSCs) that can perform well in a limited footprint. MXene nanosheets, which are recently shown in the literature to have ultra-high volumetric capacitance are used here for the fabrication of YSCs in order to identify their potentia...
Article
In article number 1600396, Shayan Seyedin, Joselito M. Razal, and co-workers discuss recent exciting advances in the synthesis, solution processing, and applications of graphene oxide liquid crystals. Some perspectives on the challenges and opportunities of graphene oxide liquid crystals for novel architectures are discussed to provide insights for...
Article
Herein, we develop a spray deposition process for the production of flexible and conductive hollow graphene fiber (HGF). Firstly, graphene oxide suspension is spray-coated on silk fibers which work as template, followed by the reduction of GO into RGO using HI as the reductant. This simple method gets rid of the picky condition and complicated proc...
Article
Full-text available
Herein, we report a new templated method for fabricating arbitrary-shaped compressible nitrogen-doped graphene aerogel (GA). The as-prepared GA remains stable under a maximum compressive strain of 90% or after 50 compress/release cycles at a strain of 80%. The compressible nitrogen-doped GA is used as electrode to fabricate the all solid-state grap...
Article
The liquid crystalline behavior of graphene oxide (GO) has enabled the design of facile and effective solution processing methods for assembling highly ordered macroscopic graphene structures, further expanding the development of novel graphene-based devices. In this progress report, first the preparation of liquid crystalline graphene oxide (LCGO)...
Article
The determination of oxygeneous groups, conjugated area ratio and reduction efficiency of graphene oxide (GO) is a difficult task because of its heterogeneous structure. Herein, we describe a novel approach for the detailed understanding of the surface chemistry of GO using pyrene as a fluorescent probe via π-π stacking interaction.
Article
High-performance reduced graphene oxide/nickel foam (rGO/NF) composite electrodes for high-performance supercapacitors were prepared by flame-induced reduction of dry graphene oxide (GO) coated on nickel foam. Flame reduction of GO is a facile, feasible and cost-effective reduction technique, which is conducted without the need of any reductant. Mo...
Article
Full-text available
An improved method for mass production of good-quality graphene nanosheets (GNs) via ball milling pristine graphite with dry ice is presented. We also report the enhanced performance of these GNs as working electrode in lithium-ion batteries (LIBs). In this improved method, the decrease of necessary ball milling time from 48 to 24 h and the increas...
Chapter
This chapter gives an overview of chip-based capillary electrophoresis (CE). It includes the factors such as the substrate materials, fabrication technologies, surface modification methods, injection methods, detection techniques, and so on, which influence the performance of the chip-based CE. Moreover, the applications of the chip-based CE are al...
Article
In this study, electron transfer behavior of the graphene nanosheets attachment on glassy carbon electrode (GCE) via direct electrochemical reduction of graphene oxide (GO) is investigated for the first time. The graphene modified electrode was achieved by simply dipping the GCE in GO suspension, followed by cyclic voltammetric scanning in the pote...
Article
Full-text available
Herein, a new graphene/Cu nanoparticle composite was prepared via the in-situ reduction of GO in the presence of Cu nanoparticle and was then utilized as a sacrificing template for the formation of flexible and porous graphene capacitor electrode by the dissolution of the intercalated Cu nanoparticle in a mixed solution of FeCl3 and HCl. The porous...
Article
Full-text available
A portable lab-on-a-chip methodology to generate ionic liquid-functionalized carbon nanodots (CNDs) was developed via electrochemical oxidation of screen printed carbon electrode. The CNDs can be successfully applied for efficient cell imaging and solid-state electrochemiluminescence sensor fabrication on the paper-based chips.
Article
Niobium complex was successfully introduced into atom transfer radical polymerization (ATRP) system as a new kind of recyclable photocatalyst. The niobium complex acted as photocatalyst that could be activated by the photoredox reaction under visible light irradiation and ethyl 2-bromoisobutyrate (EBiB) was used as initiator. Successful ATRP polyme...
Article
Full-text available
A novel tri-block copolymer poly(oxopentanoate ethyl methacrylate)-block-poly(pyridyl disulfide ethyl acrylate)-block-poly(ethylene glycol acrylate) [poly(OEMA-b-PDEA-b-PEGA)], retaining active keto groups and pyridyl disulfide (PDS) side functionalities, was synthesized as a drug delivery vehicle using reversible addition-fragmentation chain trans...
Article
A recyclable solid-state photoinitiator based on the surface modified niobium hydroxide is prepared and successfully introduces into reversible addition–fragmentation chain transfer (RAFT) polymerization under visible light illumination. It is revealed by gel permeation chromatography analysis that well-defined polymers with controlled molecular we...
Article
The preparation of thermoresponsive drug carriers with a self-destruction property is presented. These drug carriers were fabricated by incorporation of drug molecules and thermoresponsive copolymer, poly(N-isopropylacrylamide-co-acrylamide), into silica nanoparticles in a one-pot preparation process. The enhanced drug release was primarily attribu...
Article
Full-text available
Graphene is a promising material for the preparation of graphene/polymer composites with enhanced electrical, mechanical, thermal, and gas barrier properties at extremely low loading ratio due to its unique structure. Not only do the properties of graphene and polymer complement each other, the new properties may also emerge due to the synergistic...
Article
In this article, the preparation of fluorescent nanohybrids with core–shell structure and metal-enhanced fluorescence (MEF) effect was presented. The fluorescent core–shell nanohybrids were prepared using silver nanoparticles (AgNPs) as cores and fluorophore tethered thermoresponsive copolymers with tunable lower critical solution temperature (LCST...
Article
The preparation of biodegradable and thermoresponsive enzyme-polymer bioconjugates with controllable enzymatic activity via reversible addition-fragmentation chain transfer (RAFT) polymerization and amidation conjugation reaction is presented. A new 2-merca-ptothiazoline ester functionalized RAFT agent with intra-disulfide linkage was synthesized a...
Article
The effect of surface functional groups of multi-wall carbon nanotube (MWCNT) in MWCNT-modified glassy carbon electrode (MWCNT/GCE) on the simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA) was studied. Pristine MWCNT (MWCNT-P), acid-treated MWCNT (MWCNT-T), carboxyl-containing MWCNT (MWCNT-COOH), and hydroxyl-containin...

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Projects

Projects (3)
Project
Unlock new processing methods through induced long-range ordering in MXene flakes
Project
To develop methods on tailoring the properties (mechanical integrity, electrical conductivity, electrochemical property, etc.) of transition metal-carbides/nitrides (MXenes).