Site-selective growth of Ag nanoparticles controlled by localized surface plasmon resonance of nanobowl arrays

Abstract

Hexagonal Ag nanoparticle arrays are exclusively grown on top of the interstices of Au nanobowl arrays.

Self-organized and self-assembled TiO2 nanosheets and nanobowls on TiO2 nanocavities by electrochemical anodization and their properties

“…The diameter and thickness were about 76 nm and 74 nm, respectively; and the separation distance between nanobowls of around 30 nm. Likewise, our TiO 2 -nb had shorter dimensions (thickness and diameter) than another published in literature [9][10][11][12][13][14][15][16][17]. Additionally, in figures 2(b) and (d), it can be seen the top of the nanocavities (TiO 2 -nc) as some little black circles, like pores, between the spaces of the nanosheets and nanobowls.…”

“…Because of their excellent physical, optical and chemical properties, nanobowls are used in the field of the nanophotonics and photoelectrochemistry, in applications such as sieves for selecting particles, as nanocontainers or as light trappings [11,12]. Typically, nanobowls are synthesized by a colloidal crystal template, a facile solid state dewetting, microwave heating, atomic layer deposition or template-sol-gel processes [10][11][12][13][14][15][16][17]. Nonetheless, nanobowls are usually fabricated in larger dimensions, closed to 500 nm of outer diameter, and having a high manufacturing cost [12][13][14][15][16][17].…”

Manipulation and Applications of Hotspots in Nanostructured Surfaces and Thin Films

“…The detailed preparation process of large-scale ordered PS colloid sphere arrays is reported in our previous works [ 9 , 13 , 17 , 18 ]. Then, the size, nanogaps, and surface morphology of the as-prepared PS colloid sphere arrays is modified by physical and chemical method, which serves as a template [ 29 , 30 , 37 , 38 , 39 , 53 ]. Finally, various materials, including metal, metal oxides, polymers, and so on, are deposited on the ordered PS colloid sphere array templates by physical vapor deposition technique (for example, pulsed laser deposition, magnetron sputtering, thermal evaporation, e-beam evaporation), which make the nanostructured surfaces and thin films more functional.…”

“…Various nanostructured surfaces and thin films can be achieved by the combination of NSL and physical vapor deposition, such as periodic nanocaps [ 14 , 15 , 16 , 17 , 18 ], nanotriangles [ 19 , 20 , 21 , 22 ], nanobowls [ 23 , 24 , 25 ], nanorings [ 26 , 27 , 28 ], nanopillars [ 29 , 30 ], nanocones [ 31 , 32 , 33 ], and other complex nanostructured surfaces and thin films, including nanohoneycomb, bridged knobby units, nanoparticle cluster-in-bowl arrays, and so on [ 2 , 25 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. These architectural designs of nanostructured surfaces and thin films can be obtained by controlling a series of deposition processes (the deposition time, angle, distance, and so on), PS colloid sphere etching, transfer, and their combination steps, which manipulate the formation, distribution, and evolution of hotspots and have significant implications in broad applications [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 …”

SERS Immunosensor of Array Units Surrounded by Particles: A Platform for Auxiliary Diagnosis of Hepatocellular Carcinoma

“…However, these studies mainly focused on the detection process of markers, and lack of exploration for the optimization of substrate structure performance, but the substrate with excellent performance was also crucial for detection. In previous studies, our research group has done a lot of research on the distribution of local surface plasmon resonance (LSPR) and hot spots by preparing nanospheres [ 35 ], nanobowls [ 36 ], nanorods [ 22 ], and others arrays structure, and was able to conclude that suitable plasmon coupling played a key role in improving SERS signal.…”