Creation and Luminescence of a Single Silver Nanoparticle on Si(111) Investigated by Scanning Tunneling Microscopy

Abstract

We have investigated the fabrication of a single silver nanoparticle (AgNP) on Si(111) at room temperature using scanning tunneling microscopy (STM), and the luminescence of individual AgNP has been studied by means of STM light emission (STM-LE) spectroscopy. Using the field evaporation method, we succeeded in creating two types of nanostructures, i.e., AgNP and the nanohole formed by the elimination of Si atoms, on the Si substrate. It was found that two different nanostructures can be created selectively by using the appropriate electric field. STM-LE spectra of AgNP and the Si substrate exhibit the broad peak appearing in the visible light region. The peak intensity increases as increasing the AgNP size, accompanying a slight shift of the peak position. Furthermore, the theoretical calculation based on the finite-difference time-domain (FDTD) method has been used to get an insight into the STM-LE from a single AgNP on the Si substrate.

Erasable Superconductivity in Topological Insulator Bi2Se3 Induced by Voltage Pulse

“…[ 20–22 ] In general, the atomic emission process is strongly dependent on the evaporation field for different atoms, where Ag has a relatively lower evaporation field in comparison with Cu and Au. [ 18,23,24 ] On the other hand, even though Ti has a much lower evaporation field than Ag, the intercalation of Ti in Bi 2 Se 3 probably would not induce SC as in Ag x Bi 2 Se 3 . [ 19 ] Of course, the real atomic emission process can be more complicated and more detailed studies are further needed.…”

Optical trapping of optical nanoparticles: Fundamentals and applications

“…That is an issue that should be considered in any sensing experiment. It has been revealed of special importance in thermal sensing experiments 24,141 . Chemical changes in the particle environment can cause changes in their optical properties that can be erroneous attributed to temperature fluctuations.…”

“…SPE studies on ONPs allow to achieve not only nanometric spatial resolutions, but also reliable calibrations of ONPs as sensors. When the analyzed optical signal comes from many ONPs, any variation in the detected optical signal may be caused not only by changes in their environment but also by the interaction between ONPs 23,24 . In other words, when the optical signal generated by many ONPs is analyzed, bias mechanisms may interfere to the extent of reducing the reliability of the sensor.…”

Thermally and photoinduced structural and chemical changes of a silver nanocube array on Au(111)

“…[1][2][3] So far, various metals and shapes of NPs have been used to fabricate NP arrays. For example, NP arrays made of gold (AuNP) [4][5][6][7] and silver (AgNP) [8][9][10][11][12][13] are representative and have been extensively studied. The key factors in the determination of the physical and chemical properties of metal NP arrays are their shape, size and arrangement.…”