Crumpled and Eccentric Nanospheres of Ti₃C₂T_x MXene by Aerosol Jet Printing on Heat Substrate

Abstract

2D MXene has attracted tremendous attention for developing high‐performance energy storage devices regarding its good metallicity and relatively large accessible surface area. However, the electrochemical performance of MXene‐related devices was hindered due to the pronounced self‐stacking characteristic of MXene. Herein, a convenient aerosol jet printing (AJP) process is developed for the synthesis of MXene nanospheres with crumpled and eccentric structures by modulating the migration and assembly of MXene nanosheets on heat substrate. The existing temperature gradient between the apex and the edge of the deposited droplet causes thermocapillary flows carrying MXene nanosheets toward the edge and the MXene nanosheets are further shaped and assembled along the droplet surface during the solvent evaporation. Interdigital microelectrodes of crumpled MXene nanospheres are tentatively developed for electrochemical performance characterization, a competitive areal capacitance performance is demonstrated in comparison with other MXene‐based devices. Importantly, this work highlights the great potential of the AJP technique for developing functional devices with fascinating hierarchical features as well as further extending applications in miniaturized and intelligent microelectronics.

3D Networks of Silver Nanorod–Nanoparticle Hybrids via Aerosol Jetting Printing for Flexible Electrode

“…AJP has been considered as a powerful additive manufacturing (AM) process with merits of small feature size (%10 μm), wide viscosity range (1-1000 cP), and various material applicability. [47,48] During the AJP process, the aerosol droplets loading with solutes generated via atomization are transferred to the nozzle and thereafter are confined in the sheath gas out of the nozzle, forming a similar microfluidic process for well-defined shaping the aerosol droplets on the substrate. [49] Meanwhile, the microscale aerosol droplets are expected to act as an optimal microreactor for mediating the formation of nanostructures, which has been verified in different aerosol processes reported previously.…”

Aerosol‐Jet Printed Sensors for Environmental, Safety, and Health Monitoring: A Review

“…AJP compatible MXene inks were first reported in 2019 [76] and the influence of temperature on the resistance characteristics of the printed patterns has recently been investigated. [77,78] Biological ink formulations are likewise a mainstay feature of AJP sensing development, where the printing of macromolecules (e.g., proteins, DNA) [27,79] is an active area of research with studies underway to optimize printing parameters. [80] Also of interest are those inks with thermoelectric properties where the thermal energy can be converted to electricity and vice versa, thus enabling a mechanism by which their integration can help to realize self-powered sensing devices.…”

Dual-response fluorescence sensing of H2PO4− and CO32− using AJP filter paper based on a pH-stable CdII-based luminescent metal–organic framework

“…The resulting aerosol stream is suspended into the print head using N 2 (160 sccm) carrier gas and sprayed onto the filter paper of the heating platform in N 2 (60 sccm) sheath gas. 43,44,56 The heating platform temperature is set to 60 °C; the nozzle diameter is 300 μm and the isolation height is about 8 mm; the print speed is fixed at 10 mm s −1 and the filter paper is printed on 25 times (Fig. 4a).…”

“…At present, it is widely used in the printing of sensors, integrated circuits and transparent conductive films. [38][39][40][41][42][43][44] Herein, a cadmium-based luminescent metal-organic framework (JXUST-32) was constructed by introducing 2,6-naphthalenedicarboxylic acid (H 2 NDC) and 4,7-bi(1H-imidazol-1-yl)benzo-[2,1,3]thiadiazole (BIBT) with π-conjugated and electrondeficient groups (Scheme 1). Interestingly, JXUST-32 enables naked-eye recognition of H 2 PO 4 − and CO…”