Mersi Kurniati
Jurusan Fisika, Institut Pertanian Bogor, Bogor, Indonesia

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Penumbuhan Film Tipis Ti1-xCoxO2 Dengan Metode MOCVD Horasdia Saragih; Mersi Kurniati; Akhiruddin Maddu; Pepen Arifin; Moehamad Barmawi
Jurnal Matematika & Sains Vol 9, No 3 (2004)
Publisher : Institut Teknologi Bandung

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Abstract

The Ti1-xCoxO2 thin films have been successfully deposited on Silicon (Si) substrates by metalorganic chemical vapor deposition (MOCVD). The Ti1-xCoxO2 thin films with x = 0 is grown at deposition temperature of 450oC with argon and oxygen flow rate of 100 sccm and 60 sccm, respectively. The deposited film has a single orientation of (213)-anatase. The films consist of nanometer size of columnar grains. The growth rate was increased with increasing Co content and therefore the grains become larger. Generally, the crystal structure of films was affected by Co atom concentrations, however at temperature deposition of 450oC and argon flow rate of 70 sccm, the film has the initial structure of (213)-anatase and co-exist with (301)-anatase which is not dominant. The film thickness is about of 0,9 μm for an area of 3x3 cm2.
Pengaruh Temperatur Penumbuhan Terhadap Karakteristik Magnetik Film Tipis TiO2:Co yang ditumbuhkan dengan Metode Metalorganic Chemical Vapor Deposition (MOCVD) Horasdia Saragih; Pepen Arifin; Moehamad Barmawi; Mersi Kurniati
Jurnal Matematika & Sains Vol 9, No 4 (2004)
Publisher : Institut Teknologi Bandung

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Abstract

TiO2:Co thin films have been grown on p-type Si(100) substrates by MOCVD method. The films were grown at substrate temperature of 450 oC to 500 oC , and the temperature of precursor bubbler was kept constant at 50 oC with vapor pressure of 260 Torr. Flow rate of O2 and Ar are 60 sccm and 100 sccm, respectively. The crystal structure, grain shape and magnetic properties of the films depend significantly on the substrate temperature. The anatase-213 structure with columnar grain was formed for the films grown at temperatures of 400 oC and 450 oC. The arrangement of atoms at grain boundary is improved at growth temperature of 450 oC. Anatase-301 structure with cone grain shape as additional component appears at growth temperature of 500 oC. The TiCoO3 phase with 310 plane was found at growth temperature of 550 oC. The grains grow at direction of -45o from normal substrate. Films that grown at 450 oCand 500 oC exhibit soft magnetic properties with Hc of 100 Oe and 80 Oe; and Mr of 250 emu/cm3 and 220 emu/cm3, respectively. The hard magnetic properties of the films are shown for the films grown at 550 oC. The films were grown for 2 hours producing the films with thickness of about 0.7 to 0.9 μm.
Formulasi Minuman Kesehatan Ekstrak Jamur Tiram Putih (Pleurotus ostratus) Kaya β-Glukan . Masitoh; Leni Ariyanti; Fitrah Hadi Firdaus; Ade Irma; Erni Apriliana; . Irzaman; Mersi Kurniati; Maya Risanti
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 1 No. 2 (2015): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.1.2.96-100

Abstract

Situ Ilir Village located in Cibungbulang Subdistrict, Bogor District, West Java, which has the potential for substantial human resources for the more advanced, unfortunately majority of people's livelihood as traditional farmers. One of the potential contained in this village is oyster mushroom farm. The results of guidance and cooperation of the students of physics IPB like oyster mushroom production training has been carried out in this village, however the marketing less than the maximum. For example many young mushroom or fungus inadvertently severed by farmers to be not worth selling and discarded. By looking at this potential, then came the idea to create a health drink of the oyster mushroom. The aim of this community service are able to give the value of the oyster mushroom selling agricultural products, to increase public knowledge about the benefits of oyster mushrooms, and maximize human resources at Situ Ilir Village. The method used in this training are extension of oyster mushrooms, manufacture of health drinks, and β-glucan analysis using Fourier Transform Infrared (FTIR). This activity resulted in products processed from oyster mushroom as a health drink rich in β-glucan shown from the results of FTIR analysis, that can increase the sale value of the oyster mushroom and enhance the creativity of the human resources in the Situ Ilir Village, Cibungbulang Subdistrict, Bogor District, West Java.
Pengembangan Teknologi Proses Produksi Bionanokomposit Filler Biomassa Rotan Siti Nikmatin; Lisdar Idwan Sudirman; Mersi Kurniati
Jurnal Ilmu Pertanian Indonesia Vol. 19 No. 3 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Rattan biomass is a fiber waste from processing industry of rattan. Its abundant availability, as well as does not threaten the balance of food and feed, make it a potential source as raw material for composite filler of cellulose nanoparticles. To obtain a high cellulose content, it was inoculated with White rote fungi and Aspergillus niger. The experiments were conducted at inoculation time of 15, 21, and 30 days. The results showed that biomass of rattan extracted with White rote fungi and Aspergillus niger reached maximum cellulose content at the inoculation time of 21 days ie 76.47% cellulose, lignin 2.39%, and 20% moisture content. Cellulose has a monoclinic crystal structure, a =7.87; b=10.31; c=10.13 α= γ = 90, β=120. Nanoparticles were produced by disk mill-hummer mill method with variation milling time of  15, 30, and 45 minutes. Collision, friction, and heat for 30 minutes of milling could produce energy that was transferred to the particles and caused cavitation which resulted particles of 16.22-51.30 nm particle size. Production of test piece and prototype of nanocomposite using TSE and injection molding produced material which has 2 phases of crystal structure, namely monoclinic, and orthorhombic phases. The mechanical properties of impact strength was 67.769 J/m and hardness of 79.97 HRR. Thermal properties and density of bionanokomposit showed comparable values with synthetic composites.
Pembuatan Bibit Jamur Tiram Putih dengan Melibatkan Remaja di Desa Situ Ilir . Mursyidah; Lusia Anita Boru Sagala; Maya Risanti; . Irzaman; Mersi Kurniati
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 1 No. 2 (2015): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.1.2.81-87

Abstract

The community service activities to develop practical skill of teenager on seedling production of oyster mushroom (Pleurotus ostreatus) through counseling and training at Situ Ilir Village. This training was begin with counseling followed by training for seedling production of pure culture (F0), spread seeds (F1), and planting seeds (F2). The quality of this training was assured by comprehensive monitoring and evaluation. In each step of seedling production, variations of sterilization medium were used and was then analyzed using Fourier Transform Infrared Spectroscopy (FTIR) analysis. The characterization results using FTIR shows stretching vibration in mycelium for pure culture and planting seeds. The stretching vibration identify the presence of several functional of groups C-O, C-N, C=O, C-H, O-H, and β-D-glucan. The results of this training also shows that after several practice and intensive guidance the teenager were able to produce seeds of oyster mushroom (Pleurotus ostreatus) without supervision.