Nanomechanical Gas Sensing with Laser Treated 2D Nanomaterials

Abstract

which is reflected in the sheer number of review articles on the topic. [1-9] Detection of VOCs in exhaled breath has been particularly useful for the diagnosis of a broad range of diseases such as diabetes, liver and lung disorders, and different forms of cancer. [10] 2D nanomaterials such as graphene oxide (GO), molybdenum disulfide (MoS 2), and tungsten disulfide (WS 2) are viable candidates for use in chemical gas sensors due to their large specific surface area that can be tailored for analyte adsorption. 2D nanomaterials have been primarily used for the detection of toxic gasses and pollutants such as nitrogen dioxide (NO 2), hydrogen disulfide (H 2 S), carbon monoxide (CO), and carbon dioxide (CO 2), [1-3,11] while the detection of VOCs by these materials has been limited. GO, [12,13] MoS 2 , [14,15] and WS 2 [16,17] have all shown a response to water vapor or relative humidity changes. Without the aid of other compounds or dopants, graphene oxide has shown a response to ethanol [18,19] and toluene vapors. [20] Similarly, MoS 2 and WS 2 have shown a response to vapors of ethanol, acetone, hexane, toluene, and benzene. [21-23] In most of these reports, the sensing material is casted over a set of interdigitated electrodes to form a chemoresistive sensor. The interaction between analyte vapors and the sensing material (i.e., through

Synthesis of Two-Dimensional Plasmonic Molybdenum Oxide Nanomaterials by Femtosecond Laser Irradiation

“…The femtosecond laser is of great interest in nanomaterial fabrication thanks to the high electric field and tunable light polarization directions. − The high electric field can strip the electrons out of bulk materials to break chemical bonds and cause other interatomic interactions. As a result, the bulk materials can be dissociated into nanoparticles.…”

Electronic field effect detection of SARS-CoV-2 N-protein before the onset of symptoms

“…BN-GO gel FETs were fabricated in the same process as previously reported in Ref ( Novodchuk et al, 2020 ). and ( Mistry et al, 2020 ). In particular, a femtosecond laser ablation was used to fabricate h-BN quantum dots (BNQDs) from an h-BN solution in 50:50 DI water:ethanol.…”

Two‐Dimensional Nanomaterials for the Development of Efficient Gas Sensors: Recent Advances, Challenges, and Future Perspectives

“…[61] Synergistic combinations of metal oxides and 2D nanomaterials have demonstrated enhanced gas-sensing performance in many research studies and analyses. [62][63][64][65][66][67] Metal oxide-based semiconductor materials have been thoroughly observed. Gas response stability follows in post-transition metal oxides with a filled d 10 shell form oxides.…”