Functionalization and Characterization of Silicon Nanowires for Sensing Applications: A Review

Ahoulou, Samuel; Perret, Etienne; Nédélec, Jean-Marie

doi:10.3390/nano11040999

Cited by 34 publications

(26 citation statements)

References 126 publications

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“…This native oxide is of poor quality and is accompanied by many oxygen-derived defects. Moreover, native oxides are a contamination source by metallic impurities [ 79 ] and are poorly stable in aqueous media [ 80 ]. Native oxide can be easily removed by using either chemical reactants—such as buffer oxide etching (BOE) solution, diluted hydrofluoric acid (HF), HF vapor, and gaseous ammonia (NH 3 )—or by physical etching method including argon (Ar) plasma etching.…”

Section: Silicon Nanowire Propertiesmentioning

confidence: 99%

“…Native oxide can be easily removed by using either chemical reactants—such as buffer oxide etching (BOE) solution, diluted hydrofluoric acid (HF), HF vapor, and gaseous ammonia (NH 3 )—or by physical etching method including argon (Ar) plasma etching. Most of these methods provide hydrogenated surfaces that are an interesting starting point for further functionalization in the frame of sensor applications [ 79 , 81 ].…”

Section: Silicon Nanowire Propertiesmentioning

confidence: 99%

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Functional Devices from Bottom-Up Silicon Nanowires: A Review

et al. 2022

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This paper summarizes some of the essential aspects for the fabrication of functional devices from bottom-up silicon nanowires. In a first part, the different ways of exploiting nanowires in functional devices, from single nanowires to large assemblies of nanowires such as nanonets (two-dimensional arrays of randomly oriented nanowires), are briefly reviewed. Subsequently, the main properties of nanowires are discussed followed by those of nanonets that benefit from the large numbers of nanowires involved. After describing the main techniques used for the growth of nanowires, in the context of functional device fabrication, the different techniques used for nanowire manipulation are largely presented as they constitute one of the first fundamental steps that allows the nanowire positioning necessary to start the integration process. The advantages and disadvantages of each of these manipulation techniques are discussed. Then, the main families of nanowire-based transistors are presented; their most common integration routes and the electrical performance of the resulting devices are also presented and compared in order to highlight the relevance of these different geometries. Because they can be bottlenecks, the key technological elements necessary for the integration of silicon nanowires are detailed: the sintering technique, the importance of surface and interface engineering, and the key role of silicidation for good device performance. Finally the main application areas for these silicon nanowire devices are reviewed.

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Section: Silicon Nanowire Propertiesmentioning

confidence: 99%

Section: Silicon Nanowire Propertiesmentioning

confidence: 99%

Functional Devices from Bottom-Up Silicon Nanowires: A Review

et al. 2022

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“…In addition, micropatterned 1D, 2D, and 3D Si structures are attractive, label-free, and scalable sensing platforms, owing to their distinctive optical and/or electrical properties and high surface-to-volume ratio, which make them broadly interesting for biomedical applications in healthcare scenarios [ 2 , 3 , 4 ]. For example, Si pillars or nanowire field-effect transistors have been promisingly developed as potentiometric sensor devices for detecting a copious number of chemical and biological species, such as ions, DNA, proteins, and antibodies/antigens [ 5 , 6 , 7 ]. Other remarkable examples include the development of neural modulators [ 8 , 9 ], scaffolds [ 10 , 11 , 12 ], and implantable energy harvesters [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Degradation Study of Thin-Film Silicon Structures in a Cell Culture Medium

Wang

Tian

et al. 2022

Sensors

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Thin-film silicon (Si)-based transient electronics represents an emerging technology that enables spontaneous dissolution, absorption and, finally, physical disappearance in a controlled manner under physiological conditions, and has attracted increasing attention in pertinent clinical applications such as biomedical implants for on-body sensing, disease diagnostics, and therapeutics. The degradation behavior of thin-film Si materials and devices is critically dependent on the device structure as well as the environment. In this work, we experimentally investigated the dissolution of planar Si thin films and micropatterned Si pillar arrays in a cell culture medium, and systematically analyzed the evolution of their topographical, physical, and chemical properties during the hydrolysis. We discovered that the cell culture medium significantly accelerates the degradation process, and Si pillar arrays present more prominent degradation effects by creating rougher surfaces, complicating surface states, and decreasing the electrochemical impedance. Additionally, the dissolution process leads to greatly reduced mechanical strength. Finally, in vitro cell culture studies demonstrate desirable biocompatibility of corroded Si pillars. The results provide a guideline for the use of thin-film Si materials and devices as transient implants in biomedicine.

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“…Modern gas-sensing systems based on nanotechnology may enable reliable and continuous detection of different gaseous compounds to control atmospheric pollutants and protect human health [1][2][3][4][5]. With their quantum-mechanical properties, wide-bandgap semiconductor nanostructures can affect the characteristics of functional devices [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study of Gas-Sensing Properties of Titania Nanotubes for Health and Safety Applications

Galstyan

Poli

Comini

2021

The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry

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We studied the preparation and gas-sensing performance of a hybrid nanomaterial based on titania nanotubes and graphene derivatives. We fabricated the hybrid structure with tunable chemical-sensing properties, achieved by tailoring the structure and composition of graphene oxide and coupling it with titania nanotubes. The parameters of manufactured sensing structures were investigated for hydrogen and ammonia. Our experimental findings indicate that this research may demonstrate an efficient way to enhance the gas-sensing properties of metal oxide nanomaterials for health and safety applications.

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Functionalization and Characterization of Silicon Nanowires for Sensing Applications: A Review

Cited by 34 publications

References 126 publications

Functional Devices from Bottom-Up Silicon Nanowires: A Review

Functional Devices from Bottom-Up Silicon Nanowires: A Review

Degradation Study of Thin-Film Silicon Structures in a Cell Culture Medium

Study of Gas-Sensing Properties of Titania Nanotubes for Health and Safety Applications

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