The HYMALAYAN project proposes the elaboration by an original process, in a single step and in a confined system, of in-situ-controlled nanocomposite layers. The nanocomposites are in the form of nanoparticles (NP) from 4 to 100 nm homogeneously distributed in a matrix, but not limited in the respective chemical compositions of nanoparticles and the matrix. The method combines nanoparticle jets under vacuum (NJV) and the physical vapor deposition (PVD). It leverages the flexibility of NJV developed at CEA/IRAMIS, which can be adapted to any method of synthesis of NP and that of PVD for the growth of any type of matrix. The hybridization of these two techniques is made possible by routing nanoparticles to the substrate by aerodynamic means, either immediately after their synthesis, or from a colloidal suspension . The simultaneous deposition of the particles and the matrix is achieved on the same face of the same substrate . The process is innovative in that it provides no limitation in the respective chemical compositions of nanoparticles and the matrix. The characterization of the layers is performed online during deposition by in situ ellipsometry. The source of nanoparticles can be achieved by a synthesis method in the gas phase (laser pyrolysis), which makes a process completely "by - safe design" since the synthesis of NP and the nanostructured material is made in a single step and in the same confined device. The project proposes three main issues that are process optimization, characterization (in situ and ex situ) of deposits and development of composites for industrial applications. The optimization of the process will be carried out under the responsibility of SOCRATES - Industry, in partnership with DEPHIS . Characterization of deposits will be driven by HORIBA Jobin-Yvon, who will provide spectroscopic ellipsometry in situ and ex- situ measurements by glow discharge spectrometry GD -OES and TOF- MS. The axis on the applications will aim to demonstrate the flexibility and performance of this innovative process on substrates with an area of about 10 x 10 cm2. This issue will have two components. The first, led by the company DECAYEUX Luxe will focus on the production of coatings of gold NP or other precious metal in a matrix of SiO2 on manufactures in the field of luxury objects. The objective is to obtain adherent and dense layers with aesthetic properties brought by specific optical properties of nanoparticles. The second component aims to improve the performance of silicon photovoltaic cells through the development of a material composed of doped silicon nanocrystals in a matrix of SiO2 and Si3N4. The realization of homogeneous, dense and adherent composite layers over a large area (10 x 10 cm2) with precise control of the concentration of nanoparticles in the matrix will be the final goal of the project. For this purpose, the structure of nanoscale layers will be analyzed under the responsibility of LERMPS, based in different synthesis conditions. This important aspect of the project will optimize the process to best suit the intended applications. Finally, Hymalayan will remain continuously open to other industrial applications by an active approach of dissemination of the process.