Ammonia sensing by silicon nanowires (SINWs) obtained through metal assisted electrochemical etching

Nath, P.; Sarkar, D.

doi:10.1016/j.matpr.2022.02.369

Cited by 3 publications

(4 citation statements)

References 26 publications

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“…No diffraction peaks of PANI can be identified, which can be associated with the formation of a thin and amorphous layer of PANI on the silicon [31,45] . All samples display a distinct peak at 69°, which corresponds to the <400> crystal orientation as the first reflection from <100> silicon (Figure 3b), indicating that MACE and subsequent polymerization of aniline do not affect the crystallinity of the silicon [16,46] …”

Section: Resultsmentioning

confidence: 99%

“…[31,45] All samples display a distinct peak at 69°, which corresponds to the < 400 > crystal orientation as the first reflection from < 100 > silicon (Figure 3b), indicating that MACE and subsequent polymerization of aniline do not affect the crystallinity of the silicon. [16,46] The Si 2p and N 1s high-resolution X-ray photoelectron spectroscopy (XPS) spectra of SiNW-PANI are displayed in Figure 3c-3d. The Si 2p spectra can be deconvoluted into four peaks.…”

Section: Resultsmentioning

confidence: 99%

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A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

Eldona

Hawari

Hamid

et al. 2022

Chemistry An Asian Journal

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Despite its high theoretical capacity, silicon anode has limited intrinsic conductivity and experiences significant volume changes during charge-discharge. To overcome these issues, facile metal-assisted chemical etching and in-situ polymerization of aniline are employed to produce a dense 1D polyaniline/silicon nanowire forest without noticeable agglomeration as a free-standing anode for lithium-ion batteries. This hybrid electrode possesses high cycling performance, delivering a stable capacity capped at 2 mAh cm À 2 for 346 cycles of charge-discharge. Maximum capacity of 2 mAh cm À 2 is also achievable at high-rate cell testing of 2 mA cm À 2 , which cannot be obtained by the anode with plain silicon wafer and silicon nanowire only. The introduction of polyaniline on the silicon nanowire is shown to reduce the solid electrolyte interface (SEI) resistance, stabilize the SEI layer, further alleviate the effect of volume changes, and boost the conductivity of the hybrid anode, resulting in the high electrochemical performance of the anode.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

Eldona

Hawari

Hamid

et al. 2022

Chemistry An Asian Journal

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“…However, it has been reported recently, device based on MOS capacitors possess low capacitance value in the accumulation region, this resulting in higher energy consumption and low speed for the devices based on MOS capacitors [4], [5]. Therefore, silicon nanowires (SiNWs) have received considerable attention from several research communities due to their electrical, optical and mechanical properties [6], [7].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, different SiNWs fabrication procedures have been developed such as chemical vapor deposition (CVD), vapour liquid solid (VLS), laser ablation, metal assisted chemical etching (MACE) methods [7]. Among them, MACE is one of the easiest methods to fabricate SiNWs because one can be able to control surface morphology, orientation and length of nanowires and many more.…”

Section: Introductionmentioning

confidence: 99%

FREQUENCY RESPONSE ON THE ELECTRICAL CHARACTERISTICS OF SiNWS BASED MOS CAPACITOR WITH HIGH-K MATERIAL

Zulu¹,

Budak²,

Yılmaz³

2022

RAP Conference Proceedings

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In this study we report the effect of different frequency on SiNWs based capacitor. The C-V and Gm/𝜔-V were carried at different frequency of 50 kHz to 1MHz. We found that the capacitance and conductance value decreased as the value of frequency increased and this was as a result of the distribution of interface trap charges in the dielectric layer. The effect of frequency on series resistance (Rs) and interface states density (Dit) were investigated. It was found that the Rs-V curves shifted toward the inversion region, while reducing in the accumulation region. The Dit value showed a decrease in the applied voltage frequency. After removing the effect of Rs from C-V and Gm/𝜔-V curves, we found that the capacitance value increased significantly compared to uncorrected one, while the corrected conductance-voltage (Gc/ω-V) had peaks between 0.26V and 2.03V. Moreover, the obtained Dit value was on the order of 10 10 eV -1 cm -2 .

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High-Performance Field-Effect Sensing of Ammonia Based on High-Density and Ultrathin Silicon Nanowire Channels

Yang,

Liao,

Wang

et al. 2024

ACS Sens.

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Ultrathin silicon nanowires (SiNWs), grown via a high-yield and lowcost catalytic approach, are ideal building blocks for the construction of highly sensitive field-effect transistor (FET) sensors. In this work, we demonstrate a high-density growth integration of an ultrathin SiNW array, with diameter down to D NW = 24 ± 3 nm and narrow NW-to-NW spacing of only 120 nm, fabricated via an in-plane solid− liquid−solid (IPSLS) approach. Junctionless bottom-gated SiNW FETs are successfully constructed, exhibiting a high on/off current ratio of >10 7 and a sharp subthreshold swing of 156 mV/dec These provide an excellent platform for realizing highperformance NH 3 sensing at room temperature, with a high response of 96.9% at 25 ppm and 38.6% at 2.5 ppm, rapid response time of 7.9 s for 5% response (or 85.8 s for 50% response), and superior selectivity against common volatile organic compound gases in ambient environments. Finally, the field-effect sensing mechanism is attributed to the Schottky barrier modulation by the adsorbed NH 3 molecules at the metal/SiNW interface, as confirmed through an epoxy-masked selective region comparative analysis. These results provide a solid basis for the ultrathin catalytic IPSLS-SiNWs to serve as advantageous one-dimensional (1D) channels for the scalable integration of various high-performance and flexible gas sensing applications.

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Ammonia sensing by silicon nanowires (SINWs) obtained through metal assisted electrochemical etching

Cited by 3 publications

References 26 publications

A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

FREQUENCY RESPONSE ON THE ELECTRICAL CHARACTERISTICS OF SiNWS BASED MOS CAPACITOR WITH HIGH-K MATERIAL

High-Performance Field-Effect Sensing of Ammonia Based on High-Density and Ultrathin Silicon Nanowire Channels

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